Image The double walls form a 12-inch cavity that was sheathed with a coated OSB then coated with 3 inches of closed-cell spray foam; they will be filled with 9 inches of blown fiberglass.
Image Right - Open-cell polyurethane spray foam to R-28 on underside of roof turns new attic into conditioned space for HVAC.
Image Wrong - Foil air barrier was ripped to install wiring; foil should be replaced with a solid air barrier and wiring hole should be caulked. Publication Date Sat, 04/10/2021 - 12:00
Image Heated recirculation plenum spaces can be installed in parking garages in cold climates to prevent pipes from freezing and warm the floor of occupied space directly above the garage. Publication Date Sat, 09/14/2024 - 12:00
Image The basement is constructed with precast concrete walls lined with R-21.3 foil-faced rigid foam while an R-10 layer of XPS rigid foam covers the ground under the slab.
Image Cut fiber board with a red V-groove tool and a gray shiplap tool to create mitered corners and a shiplapped edge for duct sections
Image Right - The energy recovery ventilator ducts supply filtered outside air to multiple locations in the home and continuously exhaust stale air to provide clean, balanced ventilation.
Image Right – Furring strips were installed to provide a 3/8-inch drainage plane over the rigid foam and under the fiber cement lap siding. Publication Date Mon, 09/30/2019 - 12:00
Image Step 5. Install sheathing tape flashing over the duct or pipe and wood blocking on either side for later attachment of trim.
Image Step 6. Install vent hood trim block, metal cap flashing; seal top edge of flashing with sheathing tape.
Image Right – This builder installs 1 inch of XPS rigid foam on the exterior of the 2x6 walls then covers the foam with ½-inch plywood sheathing, which serves as a nailing surface for siding and trim. Publication Date Thu, 09/30/2021 - 12:00
Image This assembly can be used to thermally isolate heated or partially heated garages with slab foundations from the exterior in multifamily row houses/townhouses in IECC Climate Zones 3 and higher. Publication Date Sat, 09/14/2024 - 12:00
Image 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
Image Right - This foil-faced polyisocyanurate rigid foam is installed on an existing exterior wall and the seams are taped so the rigid foam can serve as a water control layer
Image The basement walls’ interior framing is set in 3 inches from the concrete to allow space for closed-cell foam that is sprayed directly on the concrete, then blown cellulose is added to fill the wall cavity.
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 Masonry wall interior retrofit with fluid-applied water control layer, mineral wool rigid foam, and wood or metal stud service cavity (climate zones 1-4 only) Publication Date Fri, 08/13/2021 - 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 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 This home’s exterior walls consist of two 2x4 walls; the R-49 double wall cavity is filled with 2 inches of closed-cell spray foam plus dense-packed cellulose.
Image The exterior of the home is wrapped in a continuous layer of rigid foam with all seams taped to provide a thermal, air, and moisture barrier and serve as a drainage plane, eliminating the need for house wrap.
Image Airflow within drop-in ceiling assemblies is generally not a concern due to the limited vertical height. However, airflow within air gaps in walls is a concern due to the much larger vertical height. Publication Date Sat, 09/14/2024 - 12:00
Image The inner liner of the flex duct is fastened to the collar with a tension tie, the connection is sealed with mastic, then the outer layer is pulled over and sealed with mastic or foil tape (Steven Winter Associates 2013).
Image In this gut rehab, drywall was removed then a sprayer-applied sealant was used to seal all large cracks and seams and then the 2x4 walls were filled with spray foam.
Image After spraying the 2x6 wall cavities with 2 inches (R-13) of closed-cell spray foam, the walls are covered with netting and an additional 3.5 inches of fiberglass (R-13) is blown in. Publication Date Thu, 01/01/2015 - 12:00
Image This home has a cost-saving shallow frost-protected foundation that uses rigid foam laid vertically at the base of the 16-inch-deep footers to protect the foundation from frost damage.
Image Right – Open-cell spray foam is installed over closed-cell spray foam in this hybrid approach to achieve adequate attic ventilation while allowing some vapor permeability. Publication Date Mon, 09/30/2019 - 12:00
Image Masonry wall interior retrofit with parge coat, fluid-applied water control layer, mineral wool rigid foam, and wood or metal stud service cavity (climate zones 1-4 only) Publication Date Fri, 08/13/2021 - 12:00
Image Right – This wall is constructed with the sill plate overhanging the top of the foundation wall so that when rigid foam is installed on the exterior of the foundation wall, its surface will align with the surface of the wall sheathing. Publication Date Mon, 09/30/2019 - 12:00
Image Interior wall attached with top plate metal connector, drywall clips support drywall, side view Publication Date Tue, 02/01/2011 - 12:00
Image 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
Image The exterior walls of this home consist of two wall cavities: a 2x6 wall with plywood sheathing plus 8-inch I-joists sheathed with engineered wood; both cavities are dense-packed with cellulose for R-60 total.
Image Right – A 1-inch layer of XPS rigid foam covers the 2x6 wall studs and is topped by ½-inch-thick plywood sheathing, which is covered with draining house wrap and serves as a nailing surface for siding and trim. Publication Date Thu, 09/30/2021 - 12:00
Image When architects and builders think of the house as a systems, all of the parts are designed to work together for a healthy, durable home that minimizes builder callbacks while cutting energy, maintenance, and repair costs down the road. Publication Date Thu, 09/01/2011 - 12:00
Image Right: Ductwork is installed in direct contact with lower truss cords. In this picture the main trunk is laying on the truss cords and branch ducts are temporarily held with strapping across truss cords. Ducts are well sealed with mastic
Image A low-sloped shed roof with the thermal boundary located at either a) the flat ceiling with a vented attic or b) the roof line for an unvented attic
Image 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.
Image These factory-built walls consist of 9.5-inch I-studs sheathed with coated OSB, faced with OSB, and dense-packed with cellulose; a second interior surface of drywall is added to provide a 1.5-inch cavity for electrical wiring.
Image Right – R-23 of blown fiberglass fills the walls and unvented vaulted attic cavities of this marine-climate home while an additional R-20 (4-inches) of graphite-enhanced expanded polystyrene is installed above the roof sheathing. Publication Date Thu, 09/30/2021 - 12:00
Image 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.
Image Completed wall retrofit of masonry home (on right) showing new lap siding attached over four inches of rigid foam; windows were boxed with plywood to accommodate depth of foam plus 1x4 furring strips Publication Date Fri, 08/13/2021 - 12:00
Image An Inset Shear Panel constructed with 2x4 dimensional lumber installed into a 2x6 stud bay Publication Date Thu, 08/12/2021 - 12:00
Image Polyethylene is being attached to the crawlspace floor and walls with plywood furring strips Publication Date Wed, 02/01/2012 - 12:00
Image The Larsen-truss 9-inch wall cavities were covered with a smart vapor membrane that was fastened to the trusses with furring strips, which also provide an air gap behind the wood siding; each truss cavity is then filled with blown cellulose. Publication Date Wed, 12/29/2021 - 12:00
Image Pest proofing of this unvented crawlspace includes a metal termite shield that extends out from the sill plate, metal flashing wrapping the bottom of exterior rigid foam, and a termite inspection gap above interior rigid foam. Publication Date Mon, 03/01/2021 - 12:00
Image Attach the interior 2x4 wall to the exterior wall top plate with a flat metal connector plate Publication Date Tue, 06/26/2012 - 12:00
Image Utilities are commonly recessed into cutouts in the foam after concrete has been poured Publication Date Sun, 01/01/2012 - 12:00
Image 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.
Image Drywall was removed and the existing 2x4 walls were filled with 3.5 inches of dense-packed cellulose. Outside, the ½-inch plywood was topped with house wrap, 1.5 inches closed-cell rigid foam, 1x3 furring strips, and fiber cement siding.
Image After setting precast concrete basement walls on an 8-inch bed of trap rock, this builder sprayed 2 inches of closed-cell spray foam directly onto the ground then laid piping for radiant floor heating before pouring the concrete floor slab. Publication Date Tue, 01/01/2013 - 12:00
Image Over the taped rigid foam board, 2x4 furring strips provide a ventilating air gap and drainage plane under the engineered wood lap siding. The furring strips were attached with structural screws to provide an attachment surface for the siding.
Image Install the starter strip for the vinyl siding along a chalk line Publication Date Wed, 04/01/2015 - 12:00
Image A 1- and ½-story home with a room located in the attic and the thermal boundary located at either a) the walls and ceiling of the attic room with small vented attic spaces or b) the roof line for an unvented attic
Image This kneewall has no top plate and the resulting gap provides a wide-open pathway for air and vapor to travel between the living space and the attic
Image Right: All joints in the rigid foam are taped to keep stucco out of joints for even drying. Mesh tape (shown here) is used with expanded polystyrene (EPS); acrylic sheathing tape or self-adhered membrane is used with XPS
Image Right - Batt was properly split around wires to achieve RESNET Grade I Publication Date Sat, 10/01/2011 - 12:00
Image Wrong – There is no weather stripping or gasket around the attic stair hatch Publication Date Fri, 10/28/2011 - 12:00
Image Wrong – No rigid backing was installed on the attic knee wall. Publication Date Fri, 10/28/2011 - 12:00
Image Right – Polyethylene sheeting vapor barrier is installed and sealed to the crawlspace walls with mastic Publication Date Tue, 02/01/2011 - 12:00
Image Wrong – The polyethylene sheeting vapor barrier is not attached to the piers with mechanical fasteners Publication Date Tue, 02/01/2011 - 12:00
Image This home has heat loss through the roof, leading to ice dam formation and structural issues during winter months. Publication Date Mon, 02/04/2013 - 12:00
Image Air seal attic access panels and drop-down stairs to minimize air leakage. Publication Date Fri, 10/28/2011 - 12:00
Image Polyethylene completely covers the floor of this crawlspace and is attached to the walls and piers as well Publication Date Tue, 01/01/2008 - 12:00
Image The “institutional” perfect wall works in all climate zones; water, air, vapor, and thermal control layers are exterior of the sheathing, assembly allows drying to interior and exterior Publication Date Thu, 07/01/2010 - 12:00
Image Termite control techniques for basements, footing detail Publication Date Tue, 01/01/2013 - 12:00
Image Radon control techniques for basements, footing detail Publication Date Tue, 01/01/2013 - 12:00
Image Right - Blocking has been installed between the ceiling joists and air sealed in place with canned spray foam to stop air flow beneath the attic knee wall. Publication Date Fri, 01/01/2010 - 12:00
Image Right - Basement slab with a capillary break of either gravel or a drainage mat. Publication Date Thu, 02/01/2018 - 12:00
Image Water management details for a roof drain installed along with rigid foam on a flat roof Publication Date Fri, 05/01/2015 - 12:00
Image Drainage and waterproofing system components in a basement, footing detail Publication Date Tue, 01/01/2013 - 12:00
Image Drainage and waterproofing system components of a basement, sill detail Publication Date Tue, 01/01/2013 - 12:00
Image Structural system components of slab-on-grade foundation with grade beam Publication Date Tue, 01/01/2013 - 12:00
Image This house wrap assembly can work in all climates except extreme cold. Publication Date Thu, 09/01/2011 - 12:00
Image Right - Continuous wall sheathing and blocking has been installed to brace the raised heel trusses. Publication Date Sat, 10/01/2011 - 12:00
Image Right – Attic access door has foam and rubber weatherstripping installed that remains in contact when closed. Publication Date Fri, 10/28/2011 - 12:00
Image The goal of foundation moisture management is to construct the basement, crawlspace, or slab in a way that keeps moisture from getting in in the first place Publication Date Thu, 03/01/2012 - 12:00
Image Crawl space drainage: crawl space below grade with dual drains Publication Date Tue, 01/01/2013 - 12:00
