Greening Historic Rehabilitation Projects

Transcription

1 National Park Service U.S. Department of the Interior Technical Preservation Services Greening Historic Rehabilitation Projects Liz Petrella, LEED, AP Technical Preservation Services National Park Service Washington, DC

2 Technical Preservation Services Technical Preservation Services

3 Tax Credits 20% tax credit for the certified rehabilitation of certified historic structures Statistics: 40,384 projects certified $73.8 billion investment In 2014: - $5.98 billion private construction dollars leveraged

4 Secretary of the Interior s Standards 4 Treatment Standards Preservation Rehabilitation Restoration Reconstruction

5 Rehabilitation Rehabilitation acknowledges the need to alter or add to a historic property to meet continuing or changing uses while retaining the property's historic character. Oella Mill, Oella, MD

6 Rehabilitation Standards Apply to all properties, all building types, sizes, uses, materials Apply to exteriors AND interiors Apply to the building site and environment, landscape, attached and adjacent new construction All 10 Standards must be met to comply with regulations Before After The Sorrento Apartments Washington, DC

7 10 Standards - 3 Basic Principles 1. Retain and repair historic materials, features, spaces 2. Retain historic character, even if use changes 3. Design compatible, reversible additions, alterations

8 Meeting the Standards Retain distinctive features & craftsmanship Mabel Tainter Theater, Menomonie, WI

9 Meeting the Standards Retain historic spaces like corridors, parlors, or auditoriums.

10 Meeting the Standards Repair rather than replace; replace to match Howe Farm Creamery Building, VT

11 Meeting the Standards Retain historic character, even when use changes. American Tobacco Power Plant (The Lucky Strike Building) Richmond, VA

12 Meeting the Standards Design Compatible Additions New addition

13 Principles of Sustainability Optimize Operational and Maintenance Practices Optimize Site Potential Protect and Conserve Water Optimize Material and Product Selection Enhance Indoor Environmental Quality Optimize Energy Use

14 Whole Building Design Guide Web-based portal with access to building-related guidance from a whole building perspective. Comprehensive site provides guidance on design, project management and maintenance Also includes guidance on historic preservation

15 NPS Preservation Brief 3 Addresses: Inherently sustainable features Energy Audits Improving Energy Efficiency Insulation

16 Weatherizing Historic Properties

17 Interpreting the Standards Bulletins

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20 Illustrated Guidelines for Rehabilitating Historic Buildings Developed to aid property owners, developers and Federal managers apply the Standards Unlike the Standards, Guidelines are not codified as program requirements Recommended and Not Recommended format

21 Illustrated Guidelines for Rehabilitating Historic Buildings

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25 Applying the Standards Identify the resource(s) Determine significance Understand context Examine for integrity Get specific Identify primary and secondary features and spaces Evaluate specific treatments G. G. Green Block, Woodbury, NJ

26 Standard 9 Evaluating New Features Green Roofs, Geothermal, Solar, Wind New additions, exterior alterations, or related new construction shall not destroy historic materials, features, and spatial relationships that characterize the property. The new work shall be differentiated from the old and will be compatible with the historic materials, features, size, scale and proportion, and massing to protect the integrity of the property and its environment. Standard 10 New additions and adjacent or related new construction shall be undertaken in such a manner, that if removed in the future, the essential form and integrity of the historic property and its environment would be unimpaired. [reversibility*]

27 Rehabilitation and Sustainability Issues 1700 Highpoint Avenue, Richmond, VA LEED Platinum

28 Planning & Maintenance Recommended: Integrated sustainability team-should include preservation professional Analyze condition of inherently-sustainable features Undertake regular maintenance, repair durable historic materials

29 Planning & Maintenance Not Recommended: Delaying maintenance which may result in loss of fabric Removing durable historic materials and replace w/more sustainable materials

30 Windows Recommended: Maintain windows on a regular basis, repair when deteriorated Make weather tight w/ caulk, weather stripping Install storm windows When necessary, install compatible, energy efficient replacement windows Maintain and repair existing transoms and shutters Historic industrial window retrofitted for double-glazing Historic storm windows

31 Windows Not Recommended Maintaining insensitive changes- insertion of vents/fans Blocking in existing windows or cutting openings for HVAC

32 Windows Recommended Historic windows were protected over time by storm windows Replacing storm windows rather than the historic windows - they were in good condition - in this 1925 hotel. This action saved hundreds of original windows, as well as energy. Greysolon Hotel, Duluth, MN Assessing storm window options

33 Weatherization & Insulation Recommended Use tools such as energy audits and energy modeling Develop weatherization plan Not Recommended Installing insulation that results in a wall that is too thick and alters the relationship of the wall to the historic trim and windows

34 Weatherization & Insulation Recommended: Eliminate air infiltration first Insulate in unfinished spaces, attics, basements

35 HVAC & Air Circulation Recommended Retaining functioning and efficient systems; installing new efficient systems w/in normal cycles and that retain historic character Commissioning systems and regularly examining efficiency Supplementing with programmable thermostats, fans, vents [where appropriate]

36 HVAC & Air Circulation Recommended Installing systems appropriate to the historic character Not Recommended Installing systems that change character or damage historic fabric Incompatible duct installation Compatible duct installation in an industrial interior Sensitively installed (and hidden) duct system

37 Solar Technology Recommended Installing a solar device in a compatible location on site, or on a non-historic building or addition Installing low-profile devices to minimize visibility Low-profile solar panels installed on a large flat roof Free-standing solar panels in an industrial setting

38 Solar Technology Not Recommended Placing solar devices in highly visible locations where they will negatively impact the historic building and site

39 Ground-mounted Array

40 Solar Technology Orientation, scale and angle of panels matters!

41 Solar Technology Recommended Constructing physical mock-ups to determine visibility of solar panels prior to installation. Mock-ups should be photographed from near and far. Exercise demonstrated solar panels would not be visible when installed

42 Solar: Inappropriate Installation Solar panels on historic building clearly visible from public right of way; installation does not meet the Standards.

43 Solar: Appropriate Installation Solar panel angles and locations adjusted to comply with the Standards.

44 Solar Panels & Compatibility Limit visibility Most successful on flat roofs behind parapets Set back from perimeter of roof Do not destroy or obscure historic fabric when panels are installed

45 Roofs - Green Recommended: Install green roofs on flat roofed buildings to limit visibility Ensure historic building can accommodate added weight of green roof Ensure roof is water tight and drainage systems functional Select appropriately scaled vegetation

46 Roofs - Cool Recommended: Install cool roofs on flat roofed buildings to limit visibility; white paint on gabled roofs is problematic Ensure historic roof features such as skylights - are not adversely affected. Images credited to underdown.files.workpress.com

47 Site Features & Water Efficiency Recommendations: Respect cultural landscapes and character-defining site features When compatible, add bioswales, rain gardens, rain barrels, collection tanks and cisterns to enhance stormwater management

48 New Wind Turbines on Site Most appropriate: At agricultural, industrial or utilitarian sites Where there is precedent for turbines In areas with limited visibility Located remotely from historic resources When properly scaled to limit prominence

49 Advice for Sustainable Historic Rehabilitation Projects

50 1. Decide to go green at the beginning of the project. Don t add LEED or other green certifications after the project has begun.

51 2. Identify the results desired from the project, not particular treatments or credits.

52 1. Decide to go green at the beginning of the project. Don t add LEED or other green certifications after the project has begun. 2. Identify the results desired from the project, not particular treatments or credits. 3. Assemble an experienced project team. Preservation Consultants

53 4. Educate contractors and subcontractors concerning various program requirements.

54 5. Select a building that is conducive to achieving your desired results.

55 6. Utilize the expertise of consultants, SHPO and NPS staff to find innovative solutions to conflicts. 7. Begin application processes early and take advantage of preliminary review when necessary.

56 8. 8. Make decisions based upon specific building characteristics by utilizing energy audits and models to evaluate costs vs. benefit.

57 9. Do your homework to understand the inherent green design features of the building and use them to your advantage.

58 10. Be flexible and willing to negotiate Fort Baker San Francisco, CA

59 National Park Service U.S. Department of the Interior Technical Preservation Services Greening Historic Rehabilitation Projects Liz Petrella