Image Wrong – Combustible debris under this deck ignited and led to the destruction of the deck. Publication Date Mon, 09/01/2008 - 12:00
Image Wrong – Combustible materials near a deck can ignite the deck and the home. Publication Date Mon, 09/01/2008 - 12:00
Image Right – Fully enclosed, fire-resistant deck reduces risk of deck ignition. Publication Date Sat, 12/01/2012 - 12:00
Image Right – To make decks more fire-resistant, enclose the bottom of the deck with a non-flammable skirt, and surround the deck with a non-flammable surface like pavers. Publication Date Mon, 09/01/2008 - 12:00
Image Heavy timber deck construction uses slow burning thick timbers to reduce the flammability of the deck. Publication Date Tue, 04/20/2021 - 12:00
Image Right – Deck flashing protects the deck-to-wall connection from water and burning embers. Publication Date Mon, 09/01/2008 - 12:00
Image Reduce the wildfire risks to decks by using closely spaced, heavy lumber decking and metal railings. Publication Date Mon, 09/01/2008 - 12:00
Image Heavy timber deck construction uses slow burning thick timbers to reduce the flammability of the deck. Publication Date Tue, 04/20/2021 - 12:00
Image Seal the roof deck as follows: Sweep roof decking, tape seams, and cover underlayment or roofing felt as shown. Publication Date Wed, 12/01/2010 - 12:00
Image These wildfire-resistant decks have a solid decking surface, metal railings, and the underside timber supports are covered with flame-resistant fiber cement board; also the decking is set back from the vegetated slope. Publication Date Tue, 04/20/2021 - 12:00
Image Ventilation air inlets ≥ 2 ft. above grade or roof deck in Climate Zones 1-3 or ≥ 4 ft. above grade or roof deck in Climate Zones 4-8 and not obstructed
Image Wrong - The decks of this home suffered considerable hurricane damage. Publication Date Mon, 08/01/2011 - 12:00
Image Right - The porch and deck of this coastal home survived a hurricane. Publication Date Mon, 08/01/2011 - 12:00
Image Heavy metal flashing protects the deck timbers and separates them from the wall at the wall-deck connection which is vulnerable to both ember entrapment and water damage. Publication Date Tue, 04/20/2021 - 12:00
Image Wrong – The step flashing is not the required height above the roof deck Publication Date Tue, 02/01/2011 - 12:00
Image Right – The step flashing is the correct height above the roof deck Publication Date Tue, 02/01/2011 - 12:00
Image Wrong – This deck is constructed with metal railings and the wooden supports are covered with fire-resistant stucco; however, the exposed wooden beams on the underside of the deck still pose a significant fire hazard. Publication Date Fri, 01/01/2010 - 12:00
Image Right – All penetrations through the roof decking are sealed with paint-on flashing. Publication Date Mon, 09/30/2019 - 12:00
Image Insulating the exterior and garage-side faces of the garage plaza deck can reduce thermal bridging. If the garage is heated or partially heated, the spray foam on the garage side of the plaza deck should extend to perimeter of garage. Publication Date Tue, 09/17/2024 - 12:00
Image Insulating the exterior and garage-side faces of the plaza deck can reduce thermal bridging. If the garage is heated or partially heated, the faced batt insulation on the garage side of the plaza deck should extend to perimeter of garage. Publication Date Tue, 09/17/2024 - 12:00
Image Three locations and methods for installing a roof deck radiant barrier in new construction Publication Date Mon, 06/01/2009 - 12:00
Image Apply roof underlayment over roof deck and up the sidewall over housewrap Publication Date Mon, 04/23/2012 - 12:00
Image The attic is insulated along the underside of the roof deck with 8 inches of open-cell spray foam.
Image Right - The wall top plates are sealed with foam before installing insulation on the ceiling deck.
Image Spray foam insulates and air-seals the ceiling deck and top plates of this vented attic. Publication Date Fri, 02/01/2013 - 12:00
Image Install self-sealing bituminous membrane or equivalent at all valleys and roof deck penetrations Publication Date Tue, 02/01/2011 - 12:00
Image Wood decks that extend over vegetated slopes are very vulnerable to ignition by approaching wildfires. Publication Date Sat, 12/01/2012 - 12:00
Image Attic ventilation can reduce the likelihood of ice dam formation by cooling the roof deck. Publication Date Tue, 01/01/2013 - 12:00
Image Insulating both exterior and garage-side faces of plaza deck can reduce thermal bridging. If garage is heated or partially heated, hybrid spray foam/batt insulation on garage side of plaza deck should extend to the perimeter of the garage. Publication Date Tue, 09/17/2024 - 12:00
Image Install shingle starter strip then kick-out diverter; attach to roof deck but not sidewall Publication Date Wed, 09/01/2010 - 12:00
Image Wrong - Roof deck sheathing nails missed the trusses, potentially weakening the roof in high winds. Publication Date Sun, 03/07/2021 - 12:00
Image Right – Wind baffle installation maintains necessary code clearance between baffle and roof deck Publication Date Fri, 10/28/2011 - 12:00
Image Porches and decks appear to be structurally sound after a hurricane despite damage to other portions of the houses. Publication Date Mon, 08/01/2011 - 12:00
Image Ventilation inlet is not near any exhaust outlets/contamination sources and is at least 2 ft. above the roof deck
Image This roof was insulated above the roof deck with 5.5 inches (R-38.5) of closed-cell spray foam.
Image Ventilation inlet is too close to exhaust outlets and does not extend at least 2 ft. above the roof deck
Image Right – This second-story deck also serves as a deep overhang to protect the entry door from weather Publication Date Fri, 12/31/2021 - 12:00
Image Right - Closed-cell spray foam covers the ceiling and joists to insulate and air-seal the ceiling deck.
Image Right – To make decks more resistant to fires, for floor joists and beams, use heavy fire-retardant-treated timbers, concrete, or steel framing; for decking and stair treads, use treated wood, brick, or concrete pavers; and for railings, use treated wood, Publication Date Mon, 09/01/2008 - 12:00
Image Right - Use flood-damage-resistant materials for decks and portions of the house below the design flood elevation. Publication Date Tue, 01/01/2019 - 12:00
Image The components of a roof include the rafter framing or trusses, purlins, plywood roof decking, underlayment, and the roof covering. Publication Date Tue, 01/01/2019 - 12:00
Image Right - A lattice of 1X4 furring strips provides a ventilation gap between the decking and metal roofing for this shed roof. Publication Date Sun, 05/16/2021 - 12:00
Image Spray foam insulation was installed on the underside of the roof deck and on gable end attic walls to create an unvented attic Publication Date Fri, 10/15/2021 - 12:00
Image A deck or other attached structure located at the top of a slope with vegetation underneath is at high risk of ignition during a wildfire Publication Date Tue, 04/20/2021 - 12:00
Image Right – Spray foam insulation is sprayed on the underside of the roof deck to provide a conditioned space in this low attic for the HVAC ducts. Publication Date Fri, 12/31/2021 - 12:00
Image In the attic, all of the top plate seams are sealed with canned spray foam before covering the ceiling deck with blown fiberglass.
Image Right - This shed roof is constructed with 1X4 furring strips installed over the decking and underlayment for ventilation beneath the metal roofing. Publication Date Sun, 05/16/2021 - 12:00
Image Step 1. Apply roof underlayment over roof deck and up the sidewall over the rigid foam insulation Publication Date Wed, 09/01/2010 - 12:00
Image Wrong – Roof underlayment is not fully adhered and roof deck seams are not sealed so roof is susceptible to high-wind events
Image Right – Roof underlayment is fully adhered and roof deck seams are sealed so roof is resistant to high-wind events
Image Right – Roof underlayment is fully adhered and roof deck seams are sealed so roof is resistant to high-wind events
Image Right - The underside of the attic roof deck is insulated with open-cell spray foam to provide an insulated space for HVAC equipment. Publication Date Fri, 01/01/2010 - 12:00
Image 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 Publication Date Wed, 06/01/2005 - 12:00
Image Fully enclosing the area under the deck increases its resistance to wildfire by minimizing the space where embers can lodge. Publication Date Tue, 04/20/2021 - 12:00
Image Wrong – Conventional wood deck risks ignition from embers falling on the surface or from unmaintained vegetation burning below. Publication Date Sat, 12/01/2012 - 12:00
Image Baffles allow ventilation under roof decking while keeping wind from blowing insulation back from the edges of an attic. Publication Date Thu, 09/01/2011 - 12:00
Image IECC Climate Zone 1A: Unvented Attic with Spray foam at Roof Deck, 2x6 Wall-CMU Wall, Elevated Slab Publication Date Thu, 01/11/2024 - 12:00
Image Low-slope roof assemblies constructed of two deck sheathing layers sandwiching rigid foam, and topped with mechanically fastened membrane
Image IECC Climate Zone 2A: Unvented Attic with Spray Foam at Roof Deck, 2x6 Wall/CMU Wall, Elevated Slab Publication Date Wed, 10/18/2023 - 12:00
Image IECC Climate Zone 2A: Unvented Attic with Spray Foam at Roof Deck, 2x6 Wall/CMU Wall, Elevated Slab Publication Date Wed, 10/18/2023 - 12:00
Image A patio and wall constructed of noncombustible concrete, stone, or brick helps to deflect heat and protect the deck and house from approaching wildfires. Publication Date Tue, 04/20/2021 - 12:00
Image Detail of an unvented cathedralized attic showing air-impermeable spray foam insulation plus batt insulation installed on the underside of the roof deck.
Image 2021 IECC Climate Zone 2A: Unvented Attic with Spray Foam at Roof Deck, 2x6 Wall-CMU Wall, Elevated Slab Publication Date Thu, 01/11/2024 - 12:00
Image Baffles provide an air space over the insulation to guide ventilation air from the soffit vents up along the underside of the roof deck Publication Date Thu, 06/28/2012 - 12:00
Image 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.
Image Continuous load path failure due to improper connections between the roof decking and roof framing resulting from hurricane force winds. Publication Date Mon, 08/01/2011 - 12:00
Image Sloped roof with cavity spray foam insulation sprayed on underside of roof deck and covered with sprayed-on thermal or ignition barrier coating. Publication Date Fri, 05/01/2015 - 12:00
Image Right – The roof membrane is fully adhered and deck seams are sealed so the membrane will not flutter and fail due to negative pressure from high winds
Image Right – Closed-cell polyurethane foam is sprayed on the underside of the roof deck to provide structural connections and seal seams in the sheathing to increase wind resistance
Image A roof drain is installed in an existing flat roof retrofitted with above-deck rigid foam insulation that is integrated with new air and water control layers Publication Date Thu, 09/10/2015 - 12:00
Image This builder applied an air-sealing layer of spray foam along the underside of the roof deck and the inside of the walls before filling the wall cavities with blown cellulose.
Image 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.
Image 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. Publication Date Thu, 09/01/2011 - 12:00
Image 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 Publication Date Tue, 02/01/2011 - 12:00
Image 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 Publication Date Fri, 05/01/2015 - 12:00
Image Wrong - Roof is missing metal drip edge to cover the edge of OSB roof decking, roof underlayment should be trimmed back, and asphalt shingles are poorly installed. Publication Date Mon, 09/28/2020 - 12:00
Image Unvented roof assembly at rake retrofitted with spray foam installed along the underside of the roof deck and extended to the rake edge to insulate and air seal the attic Publication Date Mon, 07/01/2013 - 12:00
Image Right - Metal drip edge on this south Florida CMU home protects the top of the fascia and edge of the roof deck from water, wind-blown rain and embers, and insects. Publication Date Tue, 06/01/2021 - 12:00
Image The unvented attic is insulated along the underside of the roof deck with 7 inches (R-49) of closed-cell spray foam, providing vaulted ceilings and a conditioned knee wall space for ducting.
Image 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 Publication Date Sat, 10/01/2011 - 12:00
Image 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.
Image Wrong – If roof membrane is not fully adhered, it can flutter and fail due to negative pressure from wind above and positive pressure from air leakage through roof deck below
Image Right - This new sealed attic has 5.5 inches (R-20) of spray foam insulation along the underside of the roof deck providing a conditioned attic space for the heating and cooling ducts.
Image Right – Metal flashing is installed between the deck boards and house wall with the top of the flashing extending up behind the siding and the bottom of the flashing extending out and down over the ledger board Publication Date Fri, 03/01/2019 - 12:00
Image This attic was insulated with 5 inches of closed-cell spray foam on the underside of the roof deck plus 6.5 inches of blown fiberglass covered with sheetrock as a firebreak for a total R-58 roof assembly insulation value.
Image 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. Publication Date Mon, 10/30/2006 - 12:00
Image Right – Spray foam air seals and insulates the walls including the walls behind the fireplace and covers the underside of the roof deck of this mixed-dry climate home to provide an insulated attic space for HVAC ducts. Publication Date Thu, 09/30/2021 - 12:00
Image Heated or partially heated garages with podium decks should be thermally isolated from both ambient exterior space and interior conditioned space by insulating the interior of the garage walls and ceiling and extending the insulation below grade. Publication Date Tue, 09/17/2024 - 12:00
Image 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. Publication Date Tue, 02/01/2011 - 12:00
