Showing results 401 - 500 of 578
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Roof dormer is braced with steel connectors and strapping to increase its resistance to uplift
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Roof-mounted solar panels shade the roof below them (left), significantly reducing the roof’s surface temperature (thermal image on the right - yellow region under the panels is cooler than the red and white region on the exposed portion of the roof)
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Roofing membrane is installed over polyisocyanurate rigid foam insulation and insulation cover board that has been cut to fit around locations for blocking for the PV system rack
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Roofing nails should be driven in straight and flush, not overdriven, underdriven, or angled
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Roofing paper protects the top of the new plywood parapet while the base of the parapet is air sealed with spray foam and fibrous insulation is installed in the rafter cavities in this flat roof retrofit
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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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Self-adhering bituminous membrane covers the entire roof of this cold climate home, a practice common under metal roofs and also on complicated roofs
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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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Side by side comparisons of standard roofing colors (top row) and cool colors (bottom row) shows that solar reflectance (R) can be reduced significantly using special coatings with almost no change to the color
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Side view showing air-sealing and rigid foam insulation is installed over existing wall and ceiling under a room above, then covered with new gypsum board.
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Side view showing how the existing garage wall and ceiling are air-sealed prior to installing rigid foam insulation on the garage side of the shared wall of an existing home.
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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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Soffits can be secured by caulking to the wall, sealing between each soffit panel and the wall channel, and screwing the wall channel to the soffit panels.
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Solar panels can be hooked up to batteries to provide emergency power during outages and to help meet daily power needs after the sun goes down
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Some builders use cantilevered trusses to get full height insulation over the exterior wall.
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Sources of heat gain in a house include solar gains, infiltration, conduction through walls and roof, occupants, and internal equipment
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Sources of heat gain in a house include solar gains, infiltration, conduction through walls and roof, occupants, and internal equipment
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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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Spray foam insulation is applied along the underside of the roof deck to provide a conditioned and non-vented attic space for ducts and air handlers.
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Spray foam insulation was installed on the underside of the roof deck and on gable end attic walls to create an unvented attic
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Step 1. Apply roof underlayment over roof deck and up the sidewall over the rigid foam insulation
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Step 2. Install shingle starter strip then kick-out diverter as first piece of step flashing.
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Step 3. Place the first shingle and the next section of sidewall flashing over upper edge of diverter
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Step 4. Install remaining sidewall flashing, appropriate counter flashing, and shingles
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Step 5. Apply self-adhesive flashing over top edge of the wall flashing, diverter, and rigid foam insulation
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Step and kick-out flashing at all roof-wall intersections extending ≥ 4 in. on wall surface above roof deck and integrated with drainage plane above
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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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Strips of roofing membrane are used to flash around a skylight on a flat roof retrofit
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Strong wind passing over a sloped roof cause positive pressure on windward side and negative pressure on leeward side and at vortices above windward eave
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The asymmetrical design of this home offers a large uninterrupted south-facing roof plane for solar photovoltaic and solar thermal panels.
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The attic is sealed and insulated along the underside of the roof deck with 5.5 inches of polyurethane spray foam, providing conditioned space for the HVAC system.
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The base of the plywood parapet is air sealed with spray foam and fibrous insulation is installed in the rafter cavities in this flat roof retrofit
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The blocking for a new PV roof-mounting system is integrated with new rigid foam and the air and water control layers installed over an existing flat roof
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The blocking is completely flashed with roofing membrane before the PV rack hardware is attached on a flat 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 components of a roof include the rafter framing or trusses, purlins, plywood roof decking, underlayment, and the roof covering.
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The cool shingles on the right have been coated with a ceramic coating to reflect near-infrared radiation, resulting in a cooler roof as shown by these thermal images (red and yellow are hotter, green and blue are cooler).
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The diverter should be adequately sized to direct all of the water away from the wall and into the gutter.
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The entire roof of the home is covered with an ice-and-water shield to help protect against moisture damage.
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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 dark tile roof on this home (top photo) was covered with a light -colored coating on day 6 (middle photo), resulting in a significant reduction in attic temperature and cooling energy consumption (bottom)
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The existing flat roof before removal of membrane shows lack of slope allowing water to pool on the surface
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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 geometry of this roof encouraged drifting of snow leading to heavy accumulation between the gables
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The green framing is lumber that was pressure treated with borate to increase its resistance to termites, mold, and moisture
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The icicles and the bare spot along the left roof ridge indicate that heat from the second-story room may be heating the underside of the roof deck, melting the snow and likely leading to ice dam formation.
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The mechanical curb for a skylight is integrated with the water management and air control layers on a flat roof retrofitted to include new above-deck rigid foam insulation
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The open-web roof and floor joists, laminated beams, and I-beams reduce raw lumber use and increase load-bearing capacity, while resisting shrinking, twisting, splitting, and warping.
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The OSB roof decking product comes with an adhered radiant foil barrier which helps to prevent heat transfer in or out of the vented attic, while R-13 unfaced fiberglass fills the advanced-framed 2x6 walls.
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The photovoltaic panels sit in a waterproof plastic tray that was installed directly on the roofing underlayment, then surrounded with roofing shingles.
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The polyethylene ceiling vapor barrier is sealed to form an air barrier around the exhaust fan in this very cold climate location (≥ CZ 6).
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The retrofitted flat roof has PV panels and walking mats installed over the roofing membrane
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The roof trusses and all other framing in this hot-humid climate home is treated with borate for mold and termite resistance.
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The simple gable roof is constructed at an unusual 6.55 pitch that allows exactly four and a half sheets of 4-foot- wide coated, taped roof sheathing to be installed as the roof deck with enough space at the peak for a continuous ridge vent.
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The standard asphalt shingle roof on this Florida home readily absorbs solar energy, allowing it to heat up to 140°F (60°C) as shown in the thermal image on the right
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The thermal boundary for a gable roof can be located at either a) the flat ceiling with a vented attic or b) the roof line for an unvented attic
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The varied roof pitches offer multiple options for solar panel placement regardless of home orientation for these production homes in Colorado.
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The ventilation space in this vented over-roof keeps the roof cool to prevent ice dams over the unvented attic
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The white TPO membrane roof on the row house on the right performs extremely well at reflecting solar energy and maintaining cool surface temperatures while the black EPDM membrane roof on the left heats up rapidly in the sunlight
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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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There are three potential locations for an attic radiant barrier – adhered to the underside of the roof decking, hanging from the rafters, or on the ceiling insulation
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These snow guards help to keep snow from sliding off the roof and injuring people below.
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This chimney was not adequately attached to the structure and fell away during an earthquake
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This finished retrofit installation of radiant barrier in attic shows the air spaces at the soffit and ridge to promote attic ventilation
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This home has heat loss through the roof, leading to ice dam formation and structural issues during winter months.
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This home uses light-colored standard paints and finishes on siding and roofing materials to reduce cooling loads without adding material cost.
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This home was designed with continuous roof vents and few roof penetrations, allowing more room for the solar shingles that integrate with the asphalt shingles installed to meet IBHS Fortified Roof criteria for increased resistance to high winds and rain
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This home’s south-facing roof provides adequate space for both a solar electric system and solar thermal hot water system.
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This house design in the Hot-Humid climate uses a slab foundation, masonry walls, and an Exterior Insulation Finish System (EIFS) cladding.
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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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This roof was constructed to meet the IBHS Fortified Roof standard by sealing the decking seams with flashing tape, installing synthetic roof underlayment secured with metal drip edge and nailed every six inches, and using self-adhered starter shingles.
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This roof was insulated above the roof deck with 5.5 inches (R-38.5) of closed-cell spray foam.
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This search for metal roofing products on the CRRC Rated Roof Products Directory highlights the initial and 3-year aged SRI values for each product
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This simplified decision tree can help a homeowner or contractor assess how appropriate a cool roof or wall will be for a particular home
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Three inches of closed-cell spray foam (R-19) and 7.5 inches (R-28) of open-cell spray foam was installed below the roof sheathing in this cathedral ceiling.
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Three locations and methods for installing a roof deck radiant barrier in new construction
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To keep water out, flashing should be integrated with the house wrap, siding, and shingles or roof tiles.
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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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