Showing results 201 - 300 of 578
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Gable end vents allow in wind-driven rain because pressures that develop between the outside surface of the wall and the inside of the attic are sufficient to drive water uphill several inches.
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Gutters and downspouts direct rainwater down and away from buildings to keep building walls and foundations drier
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Heat loss through the roof of a home in a cold climate zone leads to snow melting to form ice dams.
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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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Horizontal furring strips are installed over a taped smart membrane that serves as an air and vapor barrier and holds in insulation; the furring strips will provide a nailing surface for tongue-and-groove wood porch ceiling cladding.
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Ice dams form when warmth from the attic causes roof snow to melt and flow to roof eaves where it refreezes at the colder overhang and forms a buildup of ice causing more snowmelt to puddle where it can wick back through shingles and leak into the attic
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Ice dams formed by melting of snow on roofs can affect roofs, walls, ceilings, siding, and insulation.
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IECC Climate Zone 2A: Unvented Attic with Spray Foam at Roof Deck, 2x6 Wall/CMU Wall, Elevated Slab
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IECC Climate Zone 2A: Unvented Attic with Spray Foam at Roof Deck, 2x6 Wall/CMU Wall, Elevated Slab
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If a cool room is directly under an attic or roof, having lighter colored roofing (home on left) will reduce heat gain to the space as compared to darker roofing (home on right) because the temperature of the roof will be lower (see thermal image)
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If snow level is estimated to exceed roof load limits, snow removal may be needed; hire professionals
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Improper flashing can allow rain water into walls, causing significant damage
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Improvised deflectors that are improperly integrated into the wall flashing and gutter are rarely sized to handle the volume of water that can run off the roof in a large downpour and they may contribute to water entry into the wall.
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In 2009 IECC CZ 5 and higher, install self-sealing bituminous membrane or equivalent over sheathing at eaves from the edge of the roof line to > 2 ft. up roof deck from the interior plane of the exterior wall.
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In high wind zones, if roof tiles are fastened with screws or nails, consider using clips on tiles at the corners, ridges, hips, and perimeters.
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In high-flood-risk areas, install a roof hatch or openable skylight, min. 20x24 inches or 821 in.2 to serve as a means to access the roof for refuge
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Install a rigid air barrier to separate the porch attic from the conditioned space.
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Install birdstop at the eave in tile roofs to minimize the accumulation of debris, a fire hazard, at the roof edge.
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Install extra support and blocking if needed around the opening for a roof hatch or skylight that is wider than the rafter spacing
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Install self-sealing bituminous membrane or equivalent at all valleys and roof deck penetrations
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Install shingle starter strip then kick-out diverter; attach to roof deck but not sidewall
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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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Installation of the Self-Sealing Bituminous Membrane in Relation to the Drip Edge and Roof Underlayment
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Insulating sheathing is extended up to the roof rafters and sealed around the framing with spray foam as part of this exterior wall retrofit
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Integrate pre-formed vent pipe flashing, shingle-fashion, with roofing underlayment and shingles
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Kickout diverter flashing keeps bulk water from the roof from overflowing the gutter and continuously wetting the siding material.
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Lack of insulation over the top plate can lead to ice dam formation on a low sloped roof.
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Limited attic access may make it necessary to use a bore scope when inspecting for missing air barriers and insulation in existing buildings.
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Loss of the fascia cover in high winds exposes the vinyl soffit to entry by wind-driven rain.
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Low-slope roof assemblies constructed of two deck sheathing layers sandwiching rigid foam, and topped with mechanically fastened membrane
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Metal birdstop is installed at the eaves of a tile roof to keep out birds, bats, rodents, and flying insects
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Metal cap flashing is installed over the roof parapet and extends down over the roofing membrane
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Metal straps tie the roof rafters to the top plate for additional resistance to severe storms.
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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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New roofs are not immune to moss, which can spread quickly under favorable conditions like constant shade and low roof pitch.
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On top of the ice-and-water shield, the builder installed horizontal beams that were raised 6 inches off the deck to allow room for spray foam insulation.
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Open-web floor joists provide space for ducts between the floors of a two-story home.
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Place first shingle and next section of sidewall flashing over upper edge of diverter
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Plan view (from above) showing how the existing garage wall gypsum board is cut away to air-seal the shared wall before adding rigid foam insulation on the garage and exterior walls of the home.
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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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Poor installation can result in the loss of tile roofing in high wind regions, regardless of whether the tiles are attached with mortar, screws, nails, or foam adhesive.
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Power production from the Integrated solar shingles helps cut electric bills to $71 a month for this home in North Carolina.
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Provide flashing and sealing integrated with the air and water control layers for vents and other roof penetrations
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Provide structural supports that soffit panels can be nailed to at no less than 12 inches apart.
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Radiant barrier sheeting can be stapled to the underside of the rafters or along the inside edge of the rafters
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Raised heel or energy trusses allow even the corners of the attic to be well insulated; this helps to prevent ice dams in winter and keeps rooms cooler in summer.
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Recommended tile and mortar placement for extruded concrete flat tile roofing system
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Research by the Florida Solar Energy Center showed that light-colored and reflective roofs reduced cooling energy consumption by 18%-26%, reduced peak energy demand for cooling by 28%-35%, and reduced attic temperatures by 20°F.
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Retrofit an existing roof by installing rigid foam above the roof deck with a ventilation space between the rigid foam and the new roof sheathing plus new moisture and air control layers and cavity insulation in the roof rafters.