MARIE REED COMMUNITY LEARNING CENTER ROOFING & WATERPROOFING REPLACEMENT

Project Owner: D.C. Public Schools

• Seal Engineering, Inc. provided the roofing and waterproofing design services as part of the project team for this comprehensive building renovation project
• Extensive on-site surveys of the exterior and interior elements supplemented the existing condition background information – in order to provide a sound basis for the redesign effort
• Design elements included increased insulation to meet the current energy code and revision to the existing drainage arrangement to meet the desire for positive drainage and to alleviate extensive existing ponding
• Work included reflective cool roofing, inverted/ plaza/ accessible roofing; foundation waterproofing design, and interior air/ moisture barrier separations between the pool and other conditioned spaces

USDA TOBACCO BUILDING GREEN ROOF REPLACEMENT & FACADE REPAIRS

Project Owner:  U.S. Department of Agriculture (USDA)

• Seal Engineering Inc. served as Prime Designer in this Design-Build procured roof replacement project
• Work included replacement of a failing conventional roofing system for the circa 1931 structure with an inverted roof assembly covered by extensive vegetation
• Performed structural analysis to verify load-carrying capacity of the roof deck and associated structural framing for increased vegetative roof and ballast loads
• Repairs were designed for the supporting concrete deck, including infill of abandoned penetrations as well as selective replacement of steel support beams
• Design and construction included repair of damaged brick masonry facade element and stone cornice
• Provided construction phase services

U.S. NAVAL ACADEMY CHAPEL DOME RESTORATION

Project Owner:  U.S. Navy

• Performed field work to investigate leaks and deficiencies in the Chapel flat roofs and copper-clad dome
• Designed the selective replacement and maintenance/ repair for the copper dome and replacement for the Chapel flat roofs
• Designed a through-wall flashing system for the granite and terra cotta masonry parapets lining the Chapel roof perimeter to resolve persistent leak/ deterioration issues
• The design team included: Seal Engineering, Inc., RLF Architecture, Bell Architects, and Silman Associates

U.S. CUSTOM HOUSE ROOF REPLACEMENT

Project Owner:  General Services Administration, NCR

• Seal Engineering, Inc. performed a roofing and cornice built-in gutter system survey for the existing building and prepared drawings and technical specifications for rehabilitating the built-in gutter, performing short-term repairs on the main roof, and repairing/ replacing sloped metal penthouse roofs
• Seal Engineering, Inc. then prepared an in-depth design development report and drawings and technical specifications for the replacement of the flat roofing system on the main roof
• Provided construction phase services

THURGOOD MARSHALL FEDERAL JUDICIARY BUILDING ROOF REPLACEMENT

Project Owner:  Architect of The Capitol (AoC)

• Seal Engineering, Inc. prepared drawings and specifications for replacement of the 4th, 6th, 7th & 8th-floor roofs
• The main roofs were replaced with fully reinforced, hot-applied rubberized asphalt PRMA roofing systems
• The penthouse roofs and 8th-floor built-in gutters were replaced with 2-ply torched on modified bitumen roofing/ waterproofing systems
• Provided construction phase services

SHEPPARD PRATT WEINBURG BUILDING ROOF REPLACEMENT

Project Owner:  Sheppard Pratt Health Systems (SPHS)

• Seal Engineering, Inc.’s initial work at the Weinberg Building consisted of an assessment of a 5-year old slate roof installation on the Weinberg Building
• Together with a team consisting of an Architect and Structural Engineers, Seal Engineering, Inc., provided the Owner with litigation support to resolve deficiencies found in the roofing system and supporting structural system installations
• Provided design documents for replacement roof elements from the structural deck up, including installation of barriers to complete separation of exterior and interior conditioned spaces
• Assisted Owner in the solicitation of proposals from general contractors, reviewed construction bids, including subcontractor bid and qualification as well as participated in pre-award interviews
• Provided extensive on-site inspection services during the reconstruction to document conditions uncovered in the work and to provide the Owner with assurances that the new construction work was being installed in accordance with the drawings and specifications

RAYBURN HOUSE OFFICE BUILDING ROOF REPLACEMENT

Project Owner:  Architect of the Capitol (AoC)

• Seal Engineering, Inc., has been providing services to AoC under a variety of contracts for over 15 years
• As part of a multi-disciplinary team, participated in a study to evaluate options to replace the roof
• Options included conventional roofing, vegetative roofing, cool roofing, and building integrated photovoltaic roofing
• The final roof design package included Cool Roofing with Energy Star-rated surface with the option for installation of building integrated photovoltaic solar collection system
• Provided AoC with construction phase services including shop drawing review, attendance at progress meetings, and on-call construction inspections

PENTAGON WEDGES 3-5 SLATE ROOF REPLACEMENT

Project Owner:  U.S. Department of Defense

• Seal Engineering, Inc., was responsible for the design of the slate roofing reconstruction, including built-in and hanging gutters and associated sheet metal flashing and trim, and served as a technical consultant for the CM team
• The project consisted of removing slate shingles, sheathing, sleepers, and roofing membrane down to the structural concrete deck
• Prepared the deck surface and installed rubberized asphalt sheet membrane, sleepers, sheathing, felt underlayment, and a mix of salvaged and new slate shingles
• The project also included installation of copper/slate ridge vent assemblies, fall protection systems, and periodic firebreaks
• The original budget of $12.2 million was increased by approximately $100,000 to allow for concealed localized substrate issues
• Seal Engineering, Inc. also provided the design of the slate and flat roof repair for the entire building in the early 1990s, partial replacement design following 9/11, and development of RFP criteria for replacing flat & slate roofs under a five-year term contract from FY 2005 – FY 2009 and a one-year MACC contract for FY 2010

PENTAGON EMERGENCY ROOF REPAIRS

Project Owner:  U.S. Department of Defense

• This project included reconstruction of slate and built-up roofing systems damaged by the terrorist attack on September 11, 2001
• Slate roofing systems on Corridor 3, portions of Corridors 4 and 5, and the A-Ring roof between Corridors 4 and 5 were stripped down to the structural concrete deck, and reconstructed with a new rubberized asphalt sheet membrane course, treated wood decking/ sleeper system, and salvaged/ new unfading green slate
• Ridge and eave ventilation systems firebreaks and fall protection systems were incorporated into the design
• Flat roofing systems on A, B, C, and D Rings were replaced between Corridors 3 and 4, as well as B Ring roof between Corridors 4 and 5, and a portion of the light court roof between the A and B Rings between Corridors 4 and 5.  Fall protection systems were incorporated into the design
• National Roofing Contractors Association provided over $400,000 in donations of labor and materials towards the roof repair
• The project was a design-build effort

NEW ZEALAND EMBASSY ROOF REPAIR/ REPLACEMENT

Project Owner:  New Zealand Embassy

• In 2010 & 2015 Seal Engineering, Inc., provided maintenance and repair design, bidding, and construction phase services for the Embassy’s flat and steep-sloped roof systems
• In 2016, Seal Engineering, Inc. prepared construction documents for the replacement of both the flat and steep-sloped roof systems
• Part of the 2016 project included assessment of roof-related fall hazards and recommendations for a fall protection program
• The Embassy’s intent is to wrap the roof replacement and fall protection work into an upcoming comprehensive building renovation

NATIONAL BUILDING MUSEUM ROOF REPAIRS

Project Owner:  General Services Administration (GSA)

• Seal Engineering, Inc. performed a survey of the flat-locked-and-soldered and batten seam copper roofing systems and related built-in gutter systems for this circa 1887 government building
• The flat-locked-and-soldered copper roofing system required a full replacement due to design/ installation deficiencies and widespread trapped moisture; however, the roof replacement was removed from the project scope due to funding limitations
• Prepared maintenance and repair design to correct identified deficiencies in the batten seam copper roofing systems and gutters that were resulting in leaks to the exterior and damage to the brick masonry facade
• Identified deficiencies in the batten seam copper roofing systems and gutters that were resulting in leaks to the exterior and damage to the brick masonry facade
• Developed design for new snow guard system for the steep-sloped roofs
• Construction phase services including submittal review and spot inspections were provided
• This building is listed on the National Register of Historic Places

NATIONAL ACADEMY OF SCIENCES ROOF RESTORATION

Project Owner:  National Academy of Sciences

• Seal Engineering Inc. provided roofing design as part of the project team for this full building renovation and addition
• Work included maintenance and repair design for the historic copper roofing; flat roof replacement for the existing roofs; and roof design for infill structures
• Performed post-design services to include on-call inspection services
• This building is listed on the National Register of Historic Places

Project Owner:  U.S. National Park Service

• The Lincoln Memorial project included roof replacement on the main roof and penthouse roof, and restoration of three monumental skylights (circa 1917)
• The Jefferson Memorial project included roof replacement on two circular flat roof sections, and extensive metal wall panel/flashing installation
• Both projects featured reinforced, hot-applied rubberized asphalt roofing membranes installed in PRMA configurations.
• The Lincoln Memorial featured removable slate pavers on pedestals, while the Jefferson memorial featured custom-manufactured, radiused precast concrete pavers, to recreate the original roof appearance
• The Lincoln Memorial project won an NRCA Gold Circle Award for Innovation in 1996

Project Owner: General Services Administration (GSA)

• Seal Engineering, Inc. performed a survey of the various flat roofing systems, steep-sloped clay tile roof, and built-in gutter systems
• An existing conditions report, complete with analysis and recommendations to GSA for repair/ replacement, was provided
• Provided design for replacing flat roof systems, clay tile roofing system, and built-in gutter
• Replacement design drawings were produced of the existing roofing systems and repair to the built-in gutter systems
• A key design feature included replacing the exiting barrel-shaped roof tiles with tiles to match the original Greek profiles
• This building is listed on the National Register of Historic Places

Project Owner: The Lauren Condominium Owner’s Association

• Seal Engineering, Inc. has been providing The Lauren Condominium with consulting services since 1993.  In that time, several projects to perform maintenance and repair on the roof have been completed.
• In 2001, it was apparent that it was no longer practical to prolong the life of the existing roofing system.  Additionally, the Association had expressed its desire to expand the deck area surrounding the existing rooftop pool.
• Seal Engineering, Inc., in conjunction with Fyffe Landscape Architecture, designed the replacement roof and expanded rooftop space for residents.
• Subsequent to the roof terrace expansion, Seal Engineering, Inc. provided engineering service for the rooftop lobby expansion.
• Since the completion of construction in 2002, the residents of The Lauren have enjoyed their leak-free roofs.

Project Owner: General Services Administration (GSA)

• Seal Engineering, Inc., served as Prime Designer in this Design-Build procured roof replacement project
• Performed review of existing architectural and structural drawings as well as organized field test cuts to determine existing conditions
• Developed schematic design for a roof replacement to meet GSA objectives for a highly insulated inverted roof membrane assembly installation
• Performed structural analysis to verify the load-carrying capacity of the roof deck for increased ballast loads and provided a summary evaluation of Building Code requirements for wind design together with manufacturer recommendations for the GSA decision-making process
• Provided submittal review and construction phase inspection and consultation services

Project Owner:  General Services Administration (GSA-NCR)

• Seal Engineering Inc. surveyed and prepared a comprehensive assessment of the existing flat and sloped metal roofing systems, the built-up roofing system, and the built-in gutters for this historic federal office building
• Prepared design drawings and technical specifications for replacement of the standing seam copper, the flat-lock-and-soldered seam copper, and the built-up roofing systems
• The design included replacing the built-in gutters and fascia
• Provided post-design services including submittal and shop drawing review

Project Owner: Architect of the Capitol (AoC)

• Seal Engineering, Inc., provided an existing condition assessment report with recommendations for the Architect of the Capitol in association with KCCT Architects
• Additionally, four roof replacement options were provided to the AOC for review and selection with base-line data provided for each option
• Base-line data included material recommendations, code review/wind design analysis, drainage calculations, insulation R-value and taper design, drainage retention/detention and water runoff calculations for vegetative roofs, and data provided on weight impact, SRI, and solar emittance
• Construction Documents were developed which separated the work into several options giving the AoC flexibility on what work was to be done and with the ability to defer work as desired
• Ultimately, the skylights and roof were replaced with a ballasted, hot-rubberized asphalt IRMA with extensive solar arrays installed at the paver ballast areas on the main roof
• Seal Engineering, Inc. provided the construction phase services including submittal reviews, RFI responses,  and on-call site inspections with observation reports

Project Owner: McInturff Architects

• Seal Engineering, Inc. provided 3rd-party roofing and waterproofing consulting to McInturff Architects for the new construction for an office building renovation and addition
• Design phase services included preliminary recommendations for roofing systems, insulation, and foundation waterproofing layout repair at the initial concept phase
• Follow-on reviews occurred at key project milestones
• Provided redline comments and sketch details to convey work needed at critical interface areas
• Construction administration services included a review of product data, shop drawings, and samples for roof specification sections as well as attending design and construction meetings and providing information to the Architect regarding applicable Contractor RFIs
• Construction phase QA/QC services included on-call site inspections to provide the Architect with a reasonable level of assurance that the work was being installed in accordance with the Drawings and Specifications

Project Owner: U.S. Department of Justice (DOJ)

• Seal Engineering, Inc. worked as part of a design-build team to develop a design for reinforcing the existing large, historic terracotta Antefixae snow guards around the eaves of the clay tile roofs
• The primary driver for the project was life safety concerns associated with the Antefixae falling to the terraces and sidewalks below due to heavy/ deep snow accumulation
• In order to strengthen the Antefixae tails and address failures related to heavy/ deep snow accumulation, destructive testing and materials engineering were utilized to develop an adhered carbon fiber design
• A series of prototype repairs were made to the Antefixae and each was tested to simulate the calculated snow loads
• The final design was verified through the testing process consisting of an adhered carbon fiber reinforcement that was applied to each Antefixae
• Seal Engineering, Inc. provided the design, drawings, and details for the execution of the Antefixae repairs and provided periodic site inspections during construction
• Seal Engineering, Inc. also visited the factory repair facility to verify the reinforcement application

Project Owner: General Services Administration (GSA)

• The project included salvage/ reinstallation of mission tile roofing, replacement of wood stringers and nailers, and replacement of metal trim/ flashings and built-in gutter liners
• Seal Engineering, Inc. provided construction phase inspection services including submittal review, RFI responses, and periodic inspections

Project Owner:  Corcoran Gallery of Art, Washington, DC

• Seal Engineering, Inc. was selected as part of the team hired to develop a program for restoration of the roofing and extensive skylight systems
• The team, including historic preservationists, mechanical engineers, structural engineers, and roofing specialists (Seal Engineering, Inc.), analyzed the existing conditions and presented findings to the Owner with options for the repair and restoration of the existing systems
• In addition to looking at the materials and systems, the study included analysis of the construction process and phasing for each alternative to allow the project to proceed while the building was occupied and in full operation
• Final working drawings prepared by the team included replacement of the skylight system (a design-build effort), modification to the interior flat roof system structure to facilitate ease of future maintenance, replacement of flat roofing systems, replacement of all copper roofing systems (batten seam, flat seam and standing seam), upgrading and repair of structural supports, and modification of mechanical systems
• Seal Engineering, Inc., being responsible for all roofing elements, worked closely with other team members, including the design-build skylight contractor, to ensure seamless integration of roof replacements with adjacent detailing (structural repair, skylight installation, mechanical installations, and interface between roofing systems)

Project Owner: General Services Administration (GSA)

• Seal Engineering, Inc. provided the survey, investigation, and design services for the replacement of the existing roofing systems as part of a partial building renovation
• The investigation revealed that all roofing systems on all roof levels for this building, including the courtyard, would require replacement as part of the building renovation
• In coordination with the Prime Architect and Owner, a suitable roofing system design selection was made that provided sustainable systems to include both vegetative and Cool Roofing options
• The courtyard area included replacement of waterproofing system down to structure with a new hot-applied reinforced rubberized asphalt membrane, modification of the drainage system, addition of an overflow drainage system, and the addition of walkways for vegetative roof maintenance

Project Owner: General Services Administration (GSA)

• Seal Engineering, Inc. prepared the design for the replacement of flat roofing systems and balcony waterproofing systems and repair of slate and tile roofing systems
• Provided contract compliance inspection services during construction
• Prepared the design for waterproofing replacement at three of the building’s courtyard entrances

Project Owner:  American University

• Seal Engineering, Inc. served as Prime Designer in this Design-Bid-Build procured roof replacement project
• Performed review of existing architectural and structural drawings as well as performed field survey and took test cuts to determine existing conditions
• Developed design for a roof replacement to meet objectives for a vegetative, inverted roof membrane assembly installation
• Performed structural analysis to verify the load-carrying capacity of the roof deck and associated structural framing for increased vegetative roof and ballast loads
• Provided submittal review and construction phase inspection and consultation service

Project Owner:  Seventh-day Adventist Church

• Seal Engineering, Inc. was selected for the design of the roofing and façade components for this full-building renovation project
• Existing conditions inspection was performed to determine the extent of repairs needed to eliminate sources of existing damage throughout the building
• The final roofing scope of work included designing roof system replacement for 4 of 10 roof sections and maintenance and repair for the remaining roof sections
• Maintenance and repair of the façade was designed and included curtain wall modifications, selected glazing and sealant joint replacement, repointing and through-wall flashing replacement
• Provided flashing and interface consulting for new Atrium Skylight to roofing and curtain wall systems
• Provided construction phase services including submittal review and periodic site inspections to ensure contract compliance