Showing results 1 - 70 of 70
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A strip of OSB sheathing is installed along the perimeter when retrofitting a flat roof with a parapet
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Builders in hot climates may uses a radiant barrier product that comes adhered to the underside of the roof sheathing to reduce solar heat gain into the home.
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Closed-cell foam is sprayed into roof cavities along the masonry parapet wall to form a continuous air barrier between the wall and the sheathing of the flat roof
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Closed-cell spray foam fills the roof joist cavities forming an air barrier between the masonry parapet wall and the roof sheathing
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Composition shingle roofing system showing sheathing and hot-mopped underlayment
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Flat roof with cavity spray foam plus loose-fill insulation and gypsum board thermal barrier.
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High winds pulled the asphalt shingles and sheathing panels off this coastal home, although storm shutters protected the windows
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Install the house wrap. Cut house wrap to fit over diverter and tape top of cut wrap
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Integrate pre-formed vent pipe flashing, shingle-fashion, with roofing underlayment and shingles
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Missing step flashing and kickout flashing caused rotting of wall and roof sheathing, fascia, framing, and plywood cover below the eave at this complicated roof juncture.
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Nailing and ridge ventilation for roof sheathing used as a structural diaphragm in high-wind and seismic hazard areas.
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New coated OSB roof sheathing is installed over the existing sheathing of the flat roof and taped at the seams to provide a continuous air barrier
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Polyisocyanurate rigid foam insulation is installed in multiple layers with staggered, taped seams over the flat roof
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Retrofit an existing roof by installing rigid foam, new moisture and air control layers, new sheathing, and new cladding plus cavity insulation in the roof rafters to create an unvented attic
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Right - A continuous load path connects the roof and wall framing to the foundation.
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Right - Here, air control is established by taping the seams of the plywood panel sheathing. The roof sheathing is also trimmed flush with the wall sheathing to allow a simple and airtight connection between the roof and wall assemblies
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Right - Raised-heel trusses increase the roof height above the eaves allowing more space for insulation above exterior wall top plates; exterior wall sheathing extends up to keep wind from soffit vents from disrupting insulation.
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Right - The air control membrane installed over the roof sheathing is continuous. It connects to the air control of the wall around the entire perimeter without interruption. The roof overhangs have been cut off to make this connection continuous
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Right - These roof insulation panels are installed in multiple layers with joints offset both vertically and horizontally. The plywood nail base fastened to the roof framing holds the insulation layers together snuggly thus minimizing gaps
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Right – Battens are installed above the cork insulation to provide a ventilating layer between the insulation and the roof sheathing and cladding.
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Right – Battens were installed above the cork insulation to provide a ventilating layer between the insulation and the roof sheathing on this “hot roof” design.
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Right – If drip edge flashing is installed over fully adhered roof membrane at eaves, use flashing cement to seal the upper edge of the flashing
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Right – Install asphalt shingles over a starter strip set in an 8-inch strip of flashing cement
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Right – Retrofit Specification for installing roof sheathing an 18-inch gable end overhang
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Right – Start asphalt shingle installation with a starter strip set in an 8-inch strip of flashing cement
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Right – Taping the roof sheathing seams can greatly decrease the likelihood of water infiltration into a home in the event of a hurricane.
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Right – Under metal roofing, sheathing is protected by metal edging over a fully adhered membrane and a slip sheet of loose laid building paper
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Right-Wall-insulating sheathing is extended up to roof rafters and sealed around the framing with spray foam
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Seal the roof deck as follows: Sweep roof decking, tape seams, and cover underlayment or roofing felt as shown.
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Sheathing is removed from a flat roof to retrofit with air sealing, insulation, and water control layers
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Sleepers (tapered wood furring strips) are installed over the existing board sheathing to slope the new sheathing toward the drain in this flat roof retrofit
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Sloped roof with cavity spray foam insulation sprayed on underside of roof deck and covered with sprayed-on thermal or ignition barrier coating.
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Sloped roof with cavity spray foam insulation, strapping, and gypsum board thermal barrier
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Spray foam adhesive provides an extra water resistant layer to the joints and seams on the inside of attics.
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Strengthen an existing roof by applying two-part spray-applied polyurethane foam adhesive to all sheathing and framing joints from the underside of the roof
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The builder installed 1.5 inches of soy-based spray foam on the outside of the walls over the OSB sheathing, then kept a ¾ inch gap between the foam and the brick veneer siding to allow moisture vapor from the bricks to dissipate.
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The existing 2x8 roof rafters were topped with OSB; two layers of 2-inch rigid foam; plywood; ice and water shield at rakes, eaves, and valleys; underlayment; and fiberglass shingles, plus 6 inches of open-cell foam under the decking.
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The existing sheathing boards are removed near the perimeter of the flat roof and pressure-treated plywood is installed at the vertical face of the parapet
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The retrofitted flat roof has PV panels and walking mats installed over the roofing membrane
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The wood blocking for future PV panel installation extends above the surface of the top layer of polyisocyanurate rigid foam insulation installed as part of a flat roof retrofit
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This roof is hurricane proofed with a coated insulated OSB deck sheathing that is caulked and taped at all seams with a water-resistant tape, then fully covered with a peel-and-stick membrane, and asphalt shingles.
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To reduce the risk of condensation on the interior of the roof sheathing in cold weather, the ratio of exterior (above-deck) insulation must be increased as a percent of total attic insulation as outside temperature decreases
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Unvented roof assembly at eave retrofitted with rigid foam, spray foam, and taped top edge of existing house wrap or building paper
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Unvented roof assembly at rake retrofitted with a filler piece and taped top edge of existing house wrap or building paper to seal the top of wall-to-roof transition
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When installing fasteners in roof sheathing, common mistakes include using the wrong size fasteners, missing the framing members, overdriving nails, and using too many or too few fasteners.
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Wind path and uplift force for a gabled roof, a hip roof, and a pyramidal (another variant of a hip) roof design
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Wrong - Roof deck sheathing nails missed the trusses, potentially weakening the roof in high winds.
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Wrong – The flashing of the roof-wall juncture was installed above the roof shingles instead of below the roof shingles; also no kickout flashing was installed.