https://www.hpef.us/news daily 0.75 2025-09-09 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1484275243288-IUFDU7ZWYQ7LUR917IV7/Aldenhammering.jpg News https://www.hpef.us/news/hpef-offers-free-online-programs-for-2025-2026ag monthly 0.5 2025-09-09 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/ff5ec83f-902e-4147-8a2f-09b50ef74edc/www.hpef.us+%28Medium+Banner+%28US%29+%28Landscape%29%29+%283%29.png News - HPEF Offers Free Online Programs for 2025-2026 - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.hpef.us/news/in-support-of-our-colleagues-in-the-federal-government monthly 0.5 2025-03-18 https://www.hpef.us/news/windows-through-time-exhibition-donated-to-the-national-building-museum-and-the-national-building-arts-centerag monthly 0.5 2024-11-18 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/580e4881-8f76-44fd-8169-6a5c68bc8d9c/PXL_20231207_145841191.jpg News - Windows through Time exhibition donated to the National Building Museum and the National Building Arts Center - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.hpef.us/news/preserving-the-recent-past-4-prp4-conference-march-19-22-2025ag monthly 0.5 2024-05-16 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/8b973d9e-df5b-4b37-b389-ab767f5f9063/HPEF+-+PRP4+Website+Banner.png News - Preserving the Recent Past 4 (PRP4) Conference - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.hpef.us/news/save-the-date-cement-age-concrete-nationag monthly 0.5 2024-04-25 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/3bbdc2e8-82f8-4dfd-8c92-f5450d5b1bb3/8b28efea-2e30-862b-2806-f02cf744e0a3.png News - Save-the-Date: Cement Age / Concrete Nation - Make it stand out Save the Date October 4-6, 2024 200 years have now passed since the introduction of artificial Portland cement in 1824. No other building material since the Industrial Revolution has so transformed the built environment, ushering in the modern age. As the main ingredient in concrete, cement is the most widely used substance on Earth after water. It is also recognized as the third largest carbon dioxide emitter in the world. The technology and use of concrete in engineering and architecture have evolved greatly from its introduction in the 3rd century BCE by Roman engineers to its reemergence in the 19th century and prominence as the signature material of modern architecture and the development of 20th century cities. With over a century of building, modern concrete ‘heritage’ is now a critical topic of interest for design and preservation professionals alike. Cement Age / Concrete Nation will offer an in-depth study of the origins of modern concrete heritage, its conservation issues and methods, and current demands for sustainability and ecological transition. Philadelphia, with its rich collection of 20th century concrete architecture and infrastructure, and its proximity to the Lehigh Valley, birthplace of American artificial cement in 1871, provides a unique setting for the celebration of this milestone in building technology. The conference will be relevant to those interested in technical and construction history, 19th and 20th century architecture and engineering, and the conservation of concrete and related cementitious construction materials. https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1ce0adc9-6737-4690-91f5-15a874494256/IMI.png News - Save-the-Date: Cement Age / Concrete Nation https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/9f1fe86a-cda9-47ec-a91d-177a904faf13/APT+DVC.jpg News - Save-the-Date: Cement Age / Concrete Nation https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/8f1b64d0-0358-4242-925b-476501b477d8/Weitzman+UPenn.png News - Save-the-Date: Cement Age / Concrete Nation https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/787074e8-55e7-46dd-a859-45ba7a29f23e/HPEF-for+email.png News - Save-the-Date: Cement Age / Concrete Nation https://www.hpef.us/news/spring-2024-call-for-proposals-pid-and-pitag monthly 0.5 2024-03-27 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1711566644161-6C4T0V7CJ8ZH2ABKE74S/Orange+and+Purple+Playful+Corporate+Event+Instagram+Post.png News - Spring 2024 Call for Proposals: PiD and PiT https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1711566653275-3NAZKI6PXNJSHTPXBEW8/HPEF_PiT.png News - Spring 2024 Call for Proposals: PiD and PiT https://www.hpef.us/news/partners-in-training-now-open-winter-2023ag monthly 0.5 2023-09-19 https://www.hpef.us/news/new-preservation-brief-quizag monthly 0.5 2020-11-10 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1605033732240-FOWGDM2S6904L421BNNA/PreservationBrief17-small.png News - New Preservation Brief Quiz https://www.hpef.us/news/preserving-the-recent-past-3-conference-los-angeles-march-1316-2019ag monthly 0.5 2020-02-17 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1555394745240-P66MKR0YF60W1U4KKDJ6/PRP3-82.jpeg News - Preserving the Recent Past 3 Conference - Los Angeles - March 13–16, 2019 https://www.hpef.us/news/2016/11/3/3r4btzt5ak735xsy36c9kwc4oetq44 monthly 0.5 2016-11-21 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1478182959055-C3LZGMBEYU4CNJQS48AJ/HPEF-UIUC-Schweikher+House+documentation-2016-1.jpeg News - Architecture Students Document the Historic Schweikher House University of Illinois students document the historic Schweikher House with HPEF support. https://www.hpef.us/news/eames-house-habs-level-documentation-project-on-library-of-congress-websiteag monthly 0.5 2016-11-21 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479737153318-6JED1RRKE45K7WW5WD0Y/image-asset.jpeg News - Eames House HABS-Level Documentation Project on Library of Congress website https://www.hpef.us/news/aipr2lbv1djsvfijubcg8ati6knfkjag monthly 0.5 2016-11-21 https://www.hpef.us/news/lee-h-nelson-papers-presentation-and-exhibitionag monthly 0.5 2016-11-21 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479736553808-YELTTSLGONQD0C7O3FQP/image-asset.jpeg News - Lee H. Nelson Papers Presentation and Exhibition https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479736473057-EXEV70MFMWMYU8H1GT72/image-asset.jpeg News - Lee H. Nelson Papers Presentation and Exhibition https://www.hpef.us/news/hpef-co-sponsors-craft-skills-development-summitag monthly 0.5 2016-11-21 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479737299363-IHYDHQ9883XPNJ0VNCQC/image-asset.jpeg News - HPEF Co-Sponsors Craft Skills Development Summit Delegates at the Preservation Craft Skills Summit. (Photo credit: © J. Bryan Blundell) https://www.hpef.us/news/hpef-co-sponsors-workshop-in-preserving-historic-religious-architectureag monthly 0.5 2016-11-21 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479737441735-ZDZBL09F0AOJNRVHR77G/image-asset.png News - HPEF Co-Sponsors Workshop in Preserving Historic Religious Architecture https://www.hpef.us/news/12th-international-congress-on-the-deterioration-and-conservation-of-stoneag monthly 0.5 2016-11-21 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479737668211-Q25I09JKVDEJP20TDWAM/image-asset.jpeg News - 12th International Congress on the Deterioration and Conservation of Stone Norman Weiss with students who received a scholarship to attend the 12th Stone Conference https://www.hpef.us/events daily 0.75 2025-09-09 https://www.hpef.us/events/preservation-trades-supporting-apprenticeship-programsag monthly 0.5 2026-02-19 https://www.hpef.us/events/partners-in-training-spotlight-on-historic-hawaii-foundationag monthly 0.5 2025-10-23 https://www.hpef.us/events/partners-in-documentation-spotlight-on-miller-house-projectag monthly 0.5 2026-02-09 https://www.hpef.us/events/preserving-the-recent-past-researching-and-advocating-for-postmodernismag monthly 0.5 2025-09-30 https://www.hpef.us/partners-in-training daily 0.75 2026-03-22 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1451948768186-P7KS626M8GZQ8ESSARRW/IMG_0028+%281%29.JPG PIT Overview https://www.hpef.us/windows daily 0.75 2017-03-29 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1484274805853-8BKXEO1ZNL2OSXE5T810/publication+banner.JPG Windows https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1451945704715-P25OGEYSF1Z5EMDD9IYK/image-asset.jpeg Windows https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1451945748040-VCTTPGTNO8ZPLFKVCNQV/image-asset.jpeg Windows 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https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1451932130703-OPKYFY783A1VYMESNDTJ/tumblr_mqvsd7ij1c1rkz363o1_1280.jpg Mission Norman Weiss with students who received a scholarship to attend the 12th Stone Conference. https://www.hpef.us/new-page-2 daily 0.75 2023-06-20 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1484274467752-H4B1ZMMYJBDWJVAI9QZ8/publication+banner.JPG Interiors https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1451939912154-MDYY4BF7F351RK4YKR30/interiors-white-thumb-150x150.jpg Interiors https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1451940480407-V2ETHNJ30837K62YC5Y3/image-asset.jpeg Interiors https://www.hpef.us/home daily 1.0 2026-02-19 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1555387625401-14087PXO49LVK0PFJ1JM/2012-06-08%252Bat%252B14-08-26.jpg Home 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https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1451968881385-JH2992DM9XDOXXL0Q5GF/Prof+Wolbers+lectures+on+chemistry+of+cleaning+in+workshop-detail.jpg Conferences Overview https://www.hpef.us/contact daily 0.75 2023-05-08 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1484275034759-W2Q1VJXLMA4ASW4ACNRT/saw.jpg Contact https://www.hpef.us/publications daily 0.75 2016-01-04 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1484274212638-2X0RSXBPOB6KU4HIC01H/publication+banner.JPG Publication Overview https://www.hpef.us/partners daily 0.75 2019-04-16 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1452019508345-583Z5G58F1CCRRUYNZO6/saw.jpg Partners https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1451934517089-YWA87HOWTO12OBN31Z9V/nps-arrowhead.jpg Partners https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1451934205472-ELVMOFOUZT28GT0BJY4S/APTI.png 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https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479742597805-WOTJW66YVFEMVP8ZXTCX/2015-HPEF-PiT-Historic+Ithaca-lookingatvendortables.jpg PIT Recipients https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479742599504-SEZOPI73OJRJUK8OXWXC/2015-HPEF-PiT-Historic+Ithaca-Virginia+Searl+keynote+on+Sage+Hall+balustrades.jpg PIT Recipients https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479743957475-J63GV8VNUF6HKK5SUTS7/2014-HPEF-PIT-LCC-adobe-preservation-1.JPG PIT Recipients https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479743979169-JOGFTJ1HDG3PT10GN38Q/2014-HPEF-PIT-LCC-adobe-preservation-2.jpg PIT Recipients https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479743985488-6KLL4G9LE18NEQ6IQ2LF/2014-HPEF-PIT-LCC-adobe-preservation-3.JPG PIT Recipients https://www.hpef.us/pit-guidelines daily 0.75 2026-03-22 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1451948968144-YUT27CDA9CEICNXUWZJ4/IMG_0028+%281%29.JPG PIT Guidelines https://www.hpef.us/conferences-craftskills daily 0.75 2016-01-05 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1451966920698-PJUR1WBS8G1VOMQCWZES/image-asset.jpeg Craft Skills Development Summit Delegates at the Preservation Craft Skills Summit (Photo credit: © J. Bryan Blundell) https://www.hpef.us/historic-windows/windows-through-time/submission-information daily 0.75 2023-05-12 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331187284-FIS7AE6E4C6XN43J6O9X/florida.jpg Submission Information florida https://www.hpef.us/carpenter-rule-books-1 daily 0.75 2016-11-29 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331160899-5P2VIBB3ILODR0DO860C/rule-book-cover.jpg Carpenter Rule Books rule book cover https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331160382-ZUZ4B5PG6PSATKHMVLM3/Rules-of-Work-Boston-1800-p20.jpg Carpenter Rule Books Rules-of-Work-Boston-1800-p20 https://www.hpef.us/historic-windows daily 0.75 2017-04-16 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331162106-B1BS6GZBK3S7K8F8RH9N/window-pair.jpg Historic Windows window-pair https://www.hpef.us/historic-windows/windows-through-time daily 0.75 2016-11-29 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331168385-VW3UTO9ARL8FWNZ094DE/manomet-mill-windows.jpg Windows Through Time Exhibit manomet-mill-windows https://www.hpef.us/historic-windows/windows-through-time/early-18th-century-residential-casement-window daily 0.75 2016-11-29 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331171720-UFEDZ6YLW6AY5HR6YZUQ/early-18th-century-residential-casement-frame.jpg Eighteenth Century early-18th-century-residential-casement-frame https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331171396-Y6J8AXFKLEJVWE5GRIGX/early-18th-century-residential-casement-sash.jpg Eighteenth Century early-18th-century-residential-casement-sash https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331169086-0TO3W3S5C83JX4ZMOAW7/1740-exterior-wood-shutter.jpg Eighteenth Century 1740-exterior-wood-shutter https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331170805-QFV710378D22XKYKIBG9/deshler-morris-house-habs-boucher.jpg Eighteenth Century Deshler-Morris House in Germantown, Pennsylvania https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331170086-LSCHK38X490LFKH0VGRO/1760-georgian-style-residential-window.jpg Eighteenth Century 1760-georgian-style-residential-window https://www.hpef.us/carpenter-rule-books/carpenter-rule-and-price-book-resources daily 0.75 2016-11-29 https://www.hpef.us/special-projects daily 0.75 2017-10-20 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1480392481863-YEV8PVFBAFK7FXWFPBH7/carpenterrulebook.png Projects Overview https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1485452313356-BECJAJRM5C3FXVC9P7T4/image-asset.jpeg Projects Overview https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1508523548253-56P0L40L7G3W369HKC0G/Fred+Prozzillo+in+workshop+cleaning+exercise.jpg Projects Overview https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331162901-DL8BY7CJRQACLRB9B03C/SoHo-Cast_Iron_Walking_Tour-1.png Projects Overview SoHo-Cast_Iron_Walking_Tour https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331201688-56MILUNI9OCUALAYLAYR/pb37.jpg Projects Overview Preservation Brief 37 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331163453-WYHOSIBFNF1ODW1LYDML/rule-book-cover.jpg Projects Overview rule book cover https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1480399382529-CED3F2O2CP6QTWX5F1DE/image-asset.jpeg Projects Overview https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331163330-2C9WJT64SNP1XN11L16A/BTHL-DFPA.jpg Projects Overview Building Technology Heritage Library https://www.hpef.us/carpenter-rule-books/carpenter-rule-book-collection daily 0.75 2020-11-11 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331201603-KKC7U6NX5N5EO3UVCQZX/1774-Carpenters-title-page.jpg Carpenter Rule Book Collection Carpenter-Rule-Book-HABS-unedited https://www.hpef.us/publications/preserving-the-recent-past-publications/soaring-or-crashing daily 0.75 2017-04-19 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1492380771209-L16G0HPDPISWU15QUWBO/Figure+1-Kingdome+under+construction-1975.jpg Soaring or Crashing? - The Challenges of Preserving Thin-Shell Concrete Structures Figure 1. Kingdome under construction, 1975. King County Archive. The structure was imploded in 2000 when replaced by Safeco Field. https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1492620138080-OFDUMPVQQYH12UJVEYL0/image-asset.jpeg Soaring or Crashing? - The Challenges of Preserving Thin-Shell Concrete Structures Figure 3. Rivergate Convention Center under construction, April 1968. The Convention Center was demolished in 1995. Photo by Nick DeWolf. https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1492385274481-2I4730H76G12XSXC0QEH/image-asset.jpeg Soaring or Crashing? - The Challenges of Preserving Thin-Shell Concrete Structures Figure 5. Structural diagrams for Arch, Vault, and Shell Structures. (a) beam bending: compressive and tensile stresses develop in top and bottom; (b) compressive stresses in arch; (c) plate bending (bending in one direction only shown); (d) meridional (along latitude lines) compressive stresses in domes; (e) beam supporting plate (after Billington (18)); (f) barrel-vaulted shell, showing development of bending stresses through the overall depth of the vault, compressive stresses perpendicular to vault axis, and edge-stiffening beam (after Billington (19)) https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1492385979490-RUB6H1XEN6SXEOJLKDEM/image-asset.png Soaring or Crashing? - The Challenges of Preserving Thin-Shell Concrete Structures Figure 6. Kingdome, Seattle, Washington, 1975. Concrete placement in Shell Roof. This photograph shows the real difficulties of concrete placement on a steeply and variably sloping roof. A very stiff concrete is being used, difficult to consolidate properly in the best of conditions. Photograph courtesy of Seattle Times. https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1492394845974-3K0H76CIRI0GRM628ZR8/image-asset.png Soaring or Crashing? - The Challenges of Preserving Thin-Shell Concrete Structures Figure 7. The Kingdome, Seattle, Washington, 1986, after completion of the roofing repairs. Exterior insulation has been used around the perimeter to eliminate ponding. Photograph courtesy of Seattle Times. https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1492380078266-MMMBQ1T7OLVABY2Y2YHG/image-asset.jpeg Soaring or Crashing? - The Challenges of Preserving Thin-Shell Concrete Structures Figure 8. Assembly Hall (now State Farm Center), University of Illinois at Urbana-Champaign https://www.hpef.us/historic-windows/windows-through-time/19th-century daily 0.75 2016-11-29 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331172986-DCV7FRNTQ1HILTUAM6L0/1820-high-federal-style-residential.jpg Nineteenth Century 1820-high-federal-style-residential https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331176482-CO6SRDSQG1381KS1FD16/Kirk-Boott-House.jpg Nineteenth Century Kirk Boott House, Lowell, Massachusetts https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331171685-ATFD9JAUZCLGCKVDF30S/1820-concealed-interior-window-shutter.jpg Nineteenth Century 1820-concealed-interior-window-shutter https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331173328-S1M0WVP11PMBJLFRXMFX/1830-vernacular-federal-style-residential.jpg Nineteenth Century 1830-vernacular-federal-style-residential https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1480449112342-IO9ZT02X4T7KZ1DXD6QT/Boott-Mills.jpg Nineteenth Century Boott Cotton Mills’ Boarding House, Lowell, Massachusetts https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331173703-5OIHKNPSVF8UDNWVH300/1840-greek-revvival-commercial-building.jpg Nineteenth Century 1840-greek-revvival-commercial-building https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331174405-A540OLKLLCT7POKXG8EX/1850s-italianate-commercial.jpg Nineteenth Century 1850s-italianate-commercial https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331174715-VZQN1R07GQ3YOBKB8HGY/1860-italianate-residential1.jpg Nineteenth Century 1860-italianate-residential1 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331175922-2GYVHTCXECJM6FLZPZ49/1870-industrial-window3.jpg Nineteenth Century 1870-industrial-window3 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331176083-5679JZDXBD8CBXPDO3YB/Boott-Mills-2006.jpg Nineteenth Century Boott Cotton Mill in Lowell, Massachusetts, 2006 https://www.hpef.us/historic-windows/windows-through-time/muntin-profiles daily 0.75 2016-11-29 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331193982-DAM25RNVVEGZX2D4K02G/muntin-profiles-6301.jpg Muntin Profiles muntin-profiles-630 https://www.hpef.us/publications/preserving-the-recent-past-publications/preserving-a-prototype daily 0.75 2017-05-03 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1492621590576-KDW2O3ZRRJVCN5B3INBQ/image-asset.png Preserving a Prototype: Buckminster Fuller’s Dymaxion House Figure 1. A cross-section of the Dymaxion House illustrates the mast-hung double wire-wheel structure. Drawing courtesy of Henry Ford Museum & Greenfield Village. https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331180984-INX9F8OLM1F8QUDT2HEH/figure-2.jpg Preserving a Prototype: Buckminster Fuller’s Dymaxion House Figure 2. As constructed by William Graham in 1948, the "Wichita House" was a hybrid version of the Dymaxion House. Photograph courtesy of the William Graham family and Henry Ford Museum & Greenfield Village. https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1492622465082-SH9W36HFWQIINZV6BP77/image-asset.png Preserving a Prototype: Buckminster Fuller’s Dymaxion House Figure 3. Potential home buyers and a salesman, posing in front of the first complete prototype inside the factory, are featured on the cover of the Beech Aircraft employee newsletter of 22 March 1946. Photograph courtesy of Raytheon Corporation. https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1492623141123-S586PUQLJFFP6LK7QT2Y/image-asset.jpeg Preserving a Prototype: Buckminster Fuller’s Dymaxion House Figure 4. Prior to the disassembly of the house in 1992, the building was uninhabited and had become infested with raccoons and snakes. Photograph courtesy of the William Graham family and Henry Ford Museum & Greenfield Village. https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331181383-WXVGCPGS39S5X738VQUI/figure-5.jpg Preserving a Prototype: Buckminster Fuller’s Dymaxion House Figure 5. "Outer Z Ring" components, which constitute the building's floor structure, are racked in preparation for placement in a furnace which will heat treat them for improved corrosion resistance. Photograph courtesy of the William Graham family and Henry Ford Museum & Greenfield Village. https://www.hpef.us/conferences/cast-iron-symposium daily 0.75 2016-11-21 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331194498-LWZLUQPS1S8UQTNBLNIH/capital.jpg Cast Iron Symposium capital https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331195006-4NRSTQWRZ3077D5JZDJI/remster_9-cast-iron.jpg Cast Iron Symposium remster_9-cast-iron https://www.hpef.us/historic-windows/windows-through-time/20th-century daily 0.75 2016-11-29 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331176894-247AR6BVLC40H8UXOZSK/1905-hollow-core-metal-window.jpg Twentieth Century 1905-hollow-core-metal-window https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331178183-1JJR33JKGVE281THP3DX/1911-industrial-steel-window1.jpg Twentieth Century 1911-industrial-steel-window1 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331178531-G1IVHKSDS7GAKQAERDVR/1915-arts-and-crafts-residential1.jpg Twentieth Century 1915-arts-and-crafts-residential1 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331178920-R70RGK404EBRGHA5BII5/1920-residential.jpg Twentieth Century 1920-residential https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331180688-EP9UWH5Q4KJQG8O91JFV/rollscreen-sample-window.jpg Twentieth Century rollscreen-sample-window https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331179293-812G1W4LBR4KTUJY50Y2/1930-residential-casement1.jpg Twentieth Century 1930-residential-casement1 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1480450259695-R5YSN1688AQCNYXYQ6WV/image-asset.png Twentieth Century https://www.hpef.us/publications/walking-tours daily 0.75 2025-08-04 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479331209225-OQ1E0PDL24YJ2ES54JF5/8.469broome-SoHo-HPEF.jpeg Walking Tours 8.469broome-SoHo-HPEF https://www.hpef.us/take-me-out-to-the-ballpark daily 0.75 2017-04-21 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479745058670-AV1RKXLMNCOIRKIQ30B8/brewer-01.jpg Take Me out to the Ballpark Birmingham baseball fans fill Rickwood Field, opening day, 18 August 1910. (Historic postcard, author’s collection) https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479745277459-VR940L8SPHS8VUT96EGX/image-asset.jpeg Take Me out to the Ballpark A capacity crowd fills Rickwood Field in 1929. (Glynn West) https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479745412227-LX8ORO3FQDI3U1N6F28P/image-asset.jpeg Take Me out to the Ballpark Rickwood Field’s distinctive front entry (Bill Chapman) https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479746006678-IQI1OVNST81X8M7V6TGT/image-asset.jpeg Take Me out to the Ballpark Barons ballplayers and fans pose in front of Rickwood’s distinctive entrance, 1930. (Chuck Stewart) https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479745743963-WQF8K5HN23JB1ZZS2PX7/image-asset.jpeg Take Me out to the Ballpark Seventeen-year-old Black Baron Willie Mays, with Rickwood right field in backgound, 1948 (T.H. Hayes Collection, Memphis Shelby Public Library) https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479746377349-J32Z3YV8FOP4117KSAJ7/image-asset.jpeg Take Me out to the Ballpark Birmingham A’s Reggie Jackson at Rickwood Field, 1967 (Buddy Coker) https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479746416230-8E1TEKKINOLW3S4JIN56/image-asset.jpeg Take Me out to the Ballpark Rickwood Classic action, Barons versus Montgomery, 2005 (Christopher Frey) https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479746457876-6RFMMRKNILD386PR6MYG/image-asset.jpeg Take Me out to the Ballpark Middle school students visiting Rickwood Field as part of their Civil Rights study (Friends of Rickwood) https://www.hpef.us/windows-conference-series daily 0.75 2016-11-21 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479761382637-3T1DTDW8EP7WQ5Q90AGK/image-asset.jpeg Windows Conference Series https://www.hpef.us/interiors-conference-series-1-1 daily 0.75 2024-07-10 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/c8388490-0fdb-4549-889b-a5e45e89e490/HPEF%2B-%2BPRP4%2BWebsite%2BBanner.jpg Preserving the Recent Past Conference Series - Make it stand out Celebrating the thirtieth anniversary of the groundbreaking Preserving the Recent Past conference series and the founding of Docomomo-US, PRP4 will provide a new forum to share the latest strategies for identifying, protecting, and conserving significant structures and sites from the post-World War II era. For more information, please visit www.preservingtherecentpast.org. https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479759965085-Z1ORJY24V2XFBCYQ51VA/image-asset.jpeg Preserving the Recent Past Conference Series https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1490818862548-3U4BOYEURQDAI8C7VGUV/image-asset.jpeg Preserving the Recent Past Conference Series https://www.hpef.us/board-of-directors daily 0.75 2025-06-30 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1484274913747-062XQGTBXS5JXSCOBP3K/saw.jpg Board of Directors https://www.hpef.us/building-codes-conference-series daily 0.75 2016-11-21 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479758872505-Z3F8QYR8VYVT772G7VEQ/image-asset.png Building Codes Conference Series Petaluma Silk Mill-Photo by Sassymonkeymedia-Flickr https://www.hpef.us/new-page-4 daily 0.75 2017-01-17 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479756054461-9TV04SGODHZ6W86ZJKTU/image-asset.jpeg 12th Stone Conference Scholarships https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479756131519-LB46JQO3XJ1QKM6VMR9W/image-asset.gif 12th Stone Conference Scholarships https://www.hpef.us/12th-stone-conference-tours daily 0.75 2017-01-17 https://www.hpef.us/interiors-conference-series daily 0.75 2017-03-29 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479759308217-YUK2NEI52VOOCOGUHIPZ/image-asset.png Interiors Conference Series National Building Museum-Photo by JosephA-Flickr https://www.hpef.us/12th-stone-conference-program daily 0.75 2017-01-17 https://www.hpef.us/interiors-conference-series-1 daily 0.75 2017-03-29 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479759558851-XCGFHNLW5R3L5JRCGDE0/image-asset.jpeg Preserve and Play The 1929 men’s swimming pool on the thirteenth floor at the Medinah Athletic Club in Chicago with its lounge, grotto, and spectator seating (Scimitar) https://www.hpef.us/roofing-conference daily 0.75 2016-11-21 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479760342288-CRKTP3R37ZXOWGHQH1WF/image-asset.png Roofing Conference St. George's Chapel - Photo by Durkee, Brown, Viveiros, and Werenfels Architects https://www.hpef.us/the-analysis-and-restoration-of-the-wpa-outbuildings-in-the-wissahickon-valley daily 0.75 2017-04-21 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479747874209-CDMOEKPQZX3CY2P9HGXJ/cowing-012.jpg The Analysis and Restoration of the WPA Outbuildings in the Wissahickon Valley Figure 1. Enjoying the Wissahickon circa 1900 (Francis B. Brandt, The Wissahickon Valley: Within the City of Philadelphia. Philadelphia, Pennsylvania: Corn Exchange National Bank, 1927) https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479748197681-TUQGEAOD79U27PWM0OI5/image-asset.jpeg The Analysis and Restoration of the WPA Outbuildings in the Wissahickon Valley Figure 2. “Hot Dog Stand Menace Looms in the Wissahickon” (Philadelphia Inquirer, 11 November 1937. Reprinted with permission from Urban Archives, Philadelphia, Pennsylvania) https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479748283119-5V0FCW6DJZ88FZ3RCACX/image-asset.jpeg The Analysis and Restoration of the WPA Outbuildings in the Wissahickon Valley Figure 3. Allen’s Lane Shelter, original WPA documentation photograph, 1938 (Fairmount Park Commission Archives, Philadelphia, Pennsylvania). https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479748462083-EV1W2GXRL7PCBT3OPZ4Y/cowing-04.jpg The Analysis and Restoration of the WPA Outbuildings in the Wissahickon Valley Figure 4. The Lincoln Drive Shelter (“The New Bicycle Concession Building” Evening Bulletin, 25 June 1940. Circulating collection, Wissahickon Valley, Free Library Prints and Pictures Room, Philadelphia, Pennsylvania. Reprinted with permission from Urban Archives, Philadelphia, Pennsylvania). https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479748500725-3RRUYIAJHIZX5FI1QNUC/image-asset.jpeg The Analysis and Restoration of the WPA Outbuildings in the Wissahickon Valley Figure 5. Allen’s Lane guard shelter, 1996 (K. Cowing). https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479748684563-CECP0VYH4CDOYSHOMN0C/cowing-062.jpg The Analysis and Restoration of the WPA Outbuildings in the Wissahickon Valley Figure 6. Allen’s Lane guard shelter volunteers, 1997 (Ed Stainton). https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479748743190-YYPWMZ7BE9CQXXLZJGD0/image-asset.jpeg The Analysis and Restoration of the WPA Outbuildings in the Wissahickon Valley Figure 7. Allen’s Lane guard shelter, 2005 (K. Cowing). https://www.hpef.us/tax-incentives-conference-series daily 0.75 2017-03-29 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479760922794-8U9QN242UFY72CDWFAIY/image-asset.jpeg Tax Incentives Conference Series https://www.hpef.us/new-page-3 daily 0.75 2016-11-21 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479754305496-B63228ETLJ3VA95S6ML8/Low-Library-2.jpg 12th Stone Conference Low Library, Columbia University https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1479754556079-I688PB5YYOFORJYZA6RX/image-asset.jpeg 12th Stone Conference https://www.hpef.us/lee-nelson-papers daily 0.75 2016-11-29 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1480391286245-FOLG2O2IULXSBDTLNW4W/image-asset.jpeg Lee Nelson Papers https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1480391414892-2EQ4JH8I3QYTMXFXX728/image-asset.jpeg Lee Nelson Papers Lee Nelson examines Aquia Creek sandstone at the quarry that supplied stone for the White House. https://www.hpef.us/pid-projects daily 0.75 2022-01-22 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1486058415333-34HBFFQ7US9HUVTPOZND/Schweikher+House-HPEF-UIUC-documentation+project-04-detail2.jpg PID Projects https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1487267342454-3HS2TQ9Q4Q3VXPCLVK59/image-asset.png PID Projects https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1634589940473-V9RMK3LG30C7QILTWX5N/WatzekHouse-HarleyCowan.png PID Projects - Make it stand out Watzek House, 2021. Photo by Harley Cowan. https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1634592398398-VQ29CEOGFPY6RE4L9MVB/2021-10-Watzek-House_HABS-02.jpg PID Projects https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1634592419821-V7I7ZAPEYS72DROBK308/2021-10-Watzek-House_HABS-01.jpg PID Projects https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1634592446659-APQN39P5DFFBBPOYRHFQ/2021-10-Watzek-House_HABS-03.jpg PID Projects https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1634592475984-IOO04646ACI8FBIHHI5R/2021-04-Watzek+House-east+lawn-HABS+class+photography-09.jpg PID Projects https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1634592496918-97DTJBUYL3HC8RRIB25P/2021-10-Watzek-House_HABS-05.jpg PID Projects https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1634592525228-O0A40AJN6W6DVO0VQVQD/2021-10-Watzek-House_HABS-04.jpg PID Projects https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1487266691499-4I98TDW5FU2LTJHWKVAG/image-asset.jpeg PID Projects https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1486059864445-C0U7W5SSZNEZWQOPYC96/HPEF-UIUC-Schweikher+House+documentation-2016-1.jpeg PID Projects https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1486059864268-N5YOMQNDCP3XHRU84V3R/HPEF-UIUC-Schweikher+House+documentation-2016-2.jpeg PID Projects https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1486059866731-NYDJXYXW0GYNNK5X2CFC/HPEF-UIUC-Schweikher+House+documentation-2016-3.jpeg PID Projects https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1486059866672-RMTPMIR6KK4FKC66R9Q1/HPEF-UIUC-Schweikher+House+documentation-2016-5.jpeg PID Projects https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1486059934597-ZFP4LW4RN6GPWTV32V2Y/Schweikher+House-HPEF-UIUC-documentation+project-13.JPG PID Projects https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1486059973020-VNGBF6I4ZVE1G28LTE24/Schweikher+House-HPEF-UIUC-documentation+project-08.JPG PID Projects https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1486052809126-UEZ5F12E27O3MVX2C9S6/HPEF-Eames+House+Documentation+Project-2013-01.JPG PID Projects https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1486052828966-TRS5DIXQ22QRXI66UBFT/HPEF-Eames+House+Documentation+Project-2013-02.JPG PID Projects https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1486052853657-DUWRZ7DLW5SY0AQUCO0J/HPEF-Eames+House+Documentation+Project-2013-05.JPG PID Projects https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1486052877751-L78IEB6IZ0U4OO4UKXEG/HPEF-Eames+House+Documentation+Project-2013-08.JPG PID Projects https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1486052862864-T8YY0ONOIYITZUDJW1NU/HPEF-Eames+House+Documentation+Project-2013-06.JPG PID Projects https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1486052893070-YGI39CEL3LPPHILFSIQD/HPEF-Eames+House+Documentation+Project-2013-12.JPG PID Projects https://www.hpef.us/donate daily 0.75 2017-03-27 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1484274913747-062XQGTBXS5JXSCOBP3K/saw.jpg Donate https://www.hpef.us/pb43-historic-structure-reports daily 0.75 2025-09-23 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1503943649295-HB1C0MMT0YD4Z6BN6SG5/43-cornice.jpg Preservation Brief 43 Historic Structure Reports https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1519599420443-Q50HOP7CXONJI4NELR4Z/logo_ces_black.jpg Preservation Brief 43 Historic Structure Reports https://www.hpef.us/masonry-cleaning-colloquium-videos daily 0.75 2018-02-02 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1509303098209-PG0T2ATKXBFSV7Y362HY/5442603525_6c9f7f8fac_o.jpg Cleaning Masonry Buildings Colloquium Videos https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1508524440218-RMWJL0N5RQNN2YX4OVP6/Judy+Jacob+in+workshop+cleaning+exercise.jpg Cleaning Masonry Buildings Colloquium Videos https://www.hpef.us/aiaces-pb44-awnings-on-historic-buildings daily 0.75 2025-09-23 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1519605360492-CJ4ZV2C7CVUOM9PW3X1V/awning.jpg Preservation Brief 44 The Use of Awnings on Historic Buildings https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1519604370807-T9Z97IM3K6MCJNCSPJWT/logo_ces_black.jpg Preservation Brief 44 The Use of Awnings on Historic Buildings https://www.hpef.us/aiaces-pb45-preserving-historic-porches daily 0.75 2025-09-23 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1523744588507-ZY5KAGLX4SKNC34I31LX/HPEFPB045-Porches-headerimage.png Preservation Brief 45 Preserving Historic Wood Porches Indiana Historical Society, Jay Small Postcard Collection, Standard Cottage, 1886, Bethany Park, Indiana, Collection No. P0391, image © 2003. https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1519604370807-T9Z97IM3K6MCJNCSPJWT/logo_ces_black.jpg Preservation Brief 45 Preserving Historic Wood Porches https://www.hpef.us/aiaces-pb46-preserving-historic-gas-stations daily 0.75 2025-09-23 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1525410337759-OYM98O7OCMRX25Y5SZYC/29262v.jpg Preservation Brief 46 The Preservation and Reuse of Historic Gas Stations The Lyda Hill Texas Collection of Photographs in Carol M. Highsmith's America Project, Library of Congress, Prints and Photographs Division. https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1519604370807-T9Z97IM3K6MCJNCSPJWT/logo_ces_black.jpg Preservation Brief 46 The Preservation and Reuse of Historic Gas Stations https://www.hpef.us/aiaces-pb11-rehabilitating-historic-storefronts daily 0.75 2025-09-23 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1528155989267-51F717ZAEYWBSBA8BCOQ/067206pr-Dubuque+Seed+Company+Warehouse-Dubuque-IA.jpg Preservation Brief 11 Rehabilitating Historic Storefronts Illinois Central Railroad Freight Depot, Dubuque, Iowa. Library of Congress, Prints & Photographs Division, HABS, Reproduction number, IOWA,31-DUBU,13-G--8. https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1519604370807-T9Z97IM3K6MCJNCSPJWT/logo_ces_black.jpg Preservation Brief 11 Rehabilitating Historic Storefronts https://www.hpef.us/pit-application daily 0.75 2026-03-22 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1451948968144-YUT27CDA9CEICNXUWZJ4/IMG_0028+%281%29.JPG PIT Application https://www.hpef.us/aiaces-pb47-maintaining-historic-buildings daily 0.75 2025-09-23 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1572184087922-D3POIJ9YX15PGB9OLWY1/8a29080u.jpg Preservation Brief 47 Maintaining the Exteriors of Small and Medium Size Historic Buildings Spanish-American farmer painting window frames on his house. Chamisal, New Mexico, 1940. Russell Lee, Farm Security Administration - Office of War Information Photograph Collection (Library of Congress Prints and Photographs). https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1519604370807-T9Z97IM3K6MCJNCSPJWT/logo_ces_black.jpg Preservation Brief 47 Maintaining the Exteriors of Small and Medium Size Historic Buildings https://www.hpef.us/aiaces-pb42-historic-cast-stone daily 0.75 2025-12-29 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1572189188119-MS2714OJDBPR4OMDRV7A/detail-onandaga-cut-cast-stone-catalog-1925.png Preservation Brief 42 The Maintenance, Repair and Replacement of Cast Stone Detail of plaster mould making from Onondaga Litholite Company catalog, 1925, from APT Building Technology Heritage Library. https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1519604370807-T9Z97IM3K6MCJNCSPJWT/logo_ces_black.jpg Preservation Brief 42 The Maintenance, Repair and Replacement of Cast Stone https://www.hpef.us/aiaces-pb39-controlling-unwanted-moisture daily 0.75 2025-09-23 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1572724736707-97CTF3GQP3YNYE2ZIWBE/deteriorated-bricks-HABS-Southern-Pacific-Railroad-Carlin-Shops.png Preservation Brief 39 Holding the Line: Controlling Unwanted Moisture in Historic Buildings Interior detail, Engine Stores Building, Southern Pacific Railroad Carlin Shops, Southern Pacific Railroad, Carlin Shops, Engine Stores Building, Elko County, NV. Library of Congress, Prints & Photographs Division, HABS, Reproduction number HAER, NEV,4-CARL,1A--18. https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1519604370807-T9Z97IM3K6MCJNCSPJWT/logo_ces_black.jpg Preservation Brief 39 Holding the Line: Controlling Unwanted Moisture in Historic Buildings https://www.hpef.us/aiaces-pb35-architectural-investigation daily 0.75 2025-09-23 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1573972926645-2HEHUFHAS6SG8Q8A29IP/JML_0046.JPG Preservation Brief 35 Understanding Old Buildings: The Process of Architectural Investigation Inspecting a girder at the Pennypacker Barn during the 2019 Timber Framers Guild Workshop on Nondestructive Testing of Timber, Montgomery County, Pennsylvania. The workshop was sponsored in part by HPEF. https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1519604370807-T9Z97IM3K6MCJNCSPJWT/logo_ces_black.jpg Preservation Brief 35 Understanding Old Buildings: The Process of Architectural Investigation https://www.hpef.us/aiaces-pb15-preserving-historic-concrete daily 0.75 2025-09-23 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1600657190554-RWR5BK877LCNCY0VEQU1/103446pv.jpg Preservation Brief 15 Preservation of Historic Concrete Detail of Concrete Construction - M. E. Smith Building, Omaha, NE, Library of Congress, Prints & Photographs Division, HABS, Reproduction number HABS NEB,28-OMAH,3--10. https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1519604370807-T9Z97IM3K6MCJNCSPJWT/logo_ces_black.jpg Preservation Brief 15 Preservation of Historic Concrete https://www.hpef.us/aiaces-pb17-preserving-architectural-character daily 0.75 2025-09-23 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1600658681470-0HBOAMHBI5BS3WE7IE9O/HABS-National-Portrait-Gallery.png Preservation Brief 17 Preserving Architectural Character Patent Office Building (National Portrait Gallery), Washington, DC, Library of Congress, Prints & Photographs Division, HABS, Reproduction number HABS DC,WASH,503--20. https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1519604370807-T9Z97IM3K6MCJNCSPJWT/logo_ces_black.jpg Preservation Brief 17 Preserving Architectural Character https://www.hpef.us/aiaces-pb27-maintenance-repair-cast-iron daily 0.75 2025-09-23 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1604327829136-KH0UAUZFU8TXR225ZHWG/Hart-Block-cast-iron-facade-Louisville-KY-HABS.jpg Preservation Brief 27 Maintenance and Repair of Cast Iron 1884 cast iron facade, Hart Block, Louisville, Kentucky, 1981, Library of Congress, Prints & Photographs Division, HABS, Reproduction number HABS KY,56-LOUVI,10G--6 (CT). https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1519604370807-T9Z97IM3K6MCJNCSPJWT/logo_ces_black.jpg Preservation Brief 27 Maintenance and Repair of Cast Iron https://www.hpef.us/partners-in-documentation daily 0.75 2026-03-22 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1634593270409-3X0XIF5TKPWXT6BM20X2/Watzek-window.jpg PID Overview https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1642872879377-ERDK30K02IKPWV450HEU/070948pv.jpg PID Overview - Make it stand out A 1934 HABS team documenting the Kentucky School for the Blind. Library of Congress Prints and Photographs Division. https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1642873289144-GUT0XLNF53B82X9421JB/HPEF-UIUC-Schweikher+House+documentation-2016-3-crop.jpeg PID Overview - Make it stand out University of Illinois team documents the Schwiekher House in Schaumburg, Illinois, in 2017. https://www.hpef.us/pid-guidelines daily 0.75 2026-03-22 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1642871356398-KF7WD2CC45FFHBE3WM5V/WatzekDocumentation.jpg PID Guidelines https://www.hpef.us/pid-application daily 0.75 2026-03-22 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1642870882232-DRFYCY32SPYXET9ZSGYJ/PIDapplication-Eames-House-Documentation.jpg PID Application https://www.hpef.us/staff daily 0.75 2025-07-02 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1484274913747-062XQGTBXS5JXSCOBP3K/saw.jpg Staff https://www.hpef.us/positionswith-program-manager-listing-not-live daily 0.75 2023-04-26 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1484274913747-062XQGTBXS5JXSCOBP3K/saw.jpg Positions-with program manager listing - not live https://www.hpef.us/test daily 0.75 2023-05-15 https://www.hpef.us/preservation-brief-aia-continuing-ed daily 0.75 2025-12-29 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/41fa903f-cc03-4586-a280-3d587e7a8b69/PB37.png Preservation Brief - AIA Continuing Ed Preservation Brief 37 https://www.hpef.us/home-alt-bedford daily 0.75 2025-05-12 https://images.squarespace-cdn.com/content/v1/52a74d9ae4b0253945d2aee9/1390500612440-PGQSIY8KL9F7T5VIXQLO/chambers-2.jpg Home Alt A better world Starts with a choice Contact Us https://images.squarespace-cdn.com/content/v1/52a74d9ae4b0253945d2aee9/1390500503574-5BAPXZO9U06UV61P49UO/chambers1.jpg Home Alt Sustainability Starts with you Join Us https://images.squarespace-cdn.com/content/v1/52a74d9ae4b0253945d2aee9/1390500933384-LII4SRIPHFYOUFX0UCXC/chambers-4.jpg Home Alt A better world Starts with a choice Join Us https://images.squarespace-cdn.com/content/v1/52a74d9ae4b0253945d2aee9/1390504287124-HQ8GNX1JCE22V047MSQ9/chambers-8.jpg Home Alt Preserve Nature Join Us https://www.hpef.us/preservation-brief-aia-continuing-ed-old-version daily 0.75 2025-09-23 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/41fa903f-cc03-4586-a280-3d587e7a8b69/PB37.png Old- Preservation Brief - AIA Continuing Ed (Old Version) Preservation Brief 37 https://www.hpef.us/preservation-brief-11-rehabilitating-historic-storefronts-copy daily 0.75 2025-09-23 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1528155989267-51F717ZAEYWBSBA8BCOQ/067206pr-Dubuque+Seed+Company+Warehouse-Dubuque-IA.jpg Preservation Brief 11 Rehabilitating Historic Storefronts (Copy) Illinois Central Railroad Freight Depot, Dubuque, Iowa. Library of Congress, Prints & Photographs Division, HABS, Reproduction number, IOWA,31-DUBU,13-G--8. https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/1519604370807-T9Z97IM3K6MCJNCSPJWT/logo_ces_black.jpg Preservation Brief 11 Rehabilitating Historic Storefronts (Copy) https://www.hpef.us/in-tribute daily 0.75 2026-04-02 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/95d9a18b-a239-4b0f-87d4-0e4b3f204791/Chuck+Fisher_1989.png In Tribute - Charles Elbert Fisher III 1947-2025 https://images.squarespace-cdn.com/content/v1/568aa164c647ad510a0856fc/e1819c09-19d4-4397-b588-be2900c1282c/Chuck+Fisher_PRP3.png In Tribute - The Chuck Fisher Scholarship Supporting professional development for emerging preservation professionals with an interest in historic trades.