Image 2021 IECC Window Detail: Framed Wall with Plywood or OSB Sheathing, a WRB, Thick Rigid Insulation, and Siding (Wood, Fiber Cement, Aluminum or Vinyl) Publication Date Tue, 03/26/2024 - 12:00
Image Whole house fans draw cool night-time air in through open windows and expel hot house air into the vented attic Publication Date Mon, 03/01/1999 - 12:00
Image Concrete slabs are used on both the first and second floors of this SIP home to provide passive solar heating from large south-facing windows.
Image Right – Walls, windows, and wiring are installed in the factory for these modular homes, which are installed at the site on basement foundations made of insulated concrete wall panels. Publication Date Thu, 09/30/2021 - 12:00
Image In areas prone to high winds and hurricanes, double vertical “jack trim” and horizontal “header” and “sill” studs are recommended on all sides of window and door openings. Publication Date Tue, 01/01/2019 - 12:00
Image Ultra-efficient, R-9, triple-pane windows have insulated wood frames, argon gas between the panes, and low-emissivity coatings to slow heat transfer.
Image The fluid-applied asphalt coating provides a weather-resistant, moisture resistant layer around the house, serving as a continuous drainage plane and flashing for window and door openings.
Image Instead of solid timber headers over windows, the headers can be insulated by using a sheet of plywood or one piece of solid timer on the exterior with a layer of insulation to the inside. Publication Date Thu, 09/01/2011 - 12:00
Image Operable windows can provide fresh air to a multifamily building but each unit should also have it’s own fresh air intakes and exhaust vents Publication Date Tue, 03/22/2022 - 12:00
Image This drawing shows key head details for a window installation using a fluid-applied flashing on a wall with a mechanically attached water and air control layer and continuous insulation Publication Date Mon, 07/15/2024 - 12:00
Image This drawing shows key jamb details for a window installation using a fluid-applied flashing on a wall with a mechanically attached water and air control layer and continuous insulation Publication Date Mon, 07/15/2024 - 12:00
Image This drawing shows key sill details for a window installation using a fluid-applied flashing on a wall with a mechanically attached water and air control layer and continuous insulation Publication Date Mon, 07/15/2024 - 12:00
Image This drawing shows key head details for a window installation using a self-adhered membrane tape flashing on a wall with a mechanically attached water and air control layer Publication Date Mon, 07/15/2024 - 12:00
Image This drawing shows key jamb details for a window installation using a self-adhered membrane tape flashing on a wall with a mechanically attached water and air control layer Publication Date Mon, 07/15/2024 - 12:00
Image This drawing shows key sill details for a window installation using a self-adhered membrane tape flashing on a wall with a mechanically attached water and air control layer Publication Date Mon, 07/15/2024 - 12:00
Image Wrong: Single sided ventilation without at least two windows, wing walls, and predictable wind directions is ineffective for generating wind-driven crossflow. Publication Date Tue, 10/09/2018 - 12:00
Image The basement is half in and half out of the ground with only 4 feet below grade, which allows for full 36-inch-tall windows that are completely above grade.
Image Deep overhangs and a covered front porch provide solar window shading from high summer sun and help keep the entryway snow-free in winter.
Image Double fan window units can have multiple operational modes; most often outdoor air will be brought in at night when outdoor conditions are cooler Publication Date Mon, 11/14/2022 - 12:00
Image This infrared image shows little heat gain from north-facing double-pane windows with blinds, but significant heat output from computer monitors Publication Date Mon, 11/14/2022 - 12:00
Image Triple-Pane windows can be used as a tradeoff for continuous wall insulation or stricter air sealing targets when showing compliance with the 2021 IECC using the UA path Publication Date Mon, 01/01/2024 - 12:00
Image This drawing shows key head details for an “outie” window installation using a fluid-applied flashing on a wall with a fluid-applied water and air control layer and continuous insulation Publication Date Mon, 07/15/2024 - 12:00
Image This drawing shows key sill details for an “outie” window installation using a fluid-applied flashing on a wall with a fluid-applied water and air control layer and continuous insulation Publication Date Mon, 07/15/2024 - 12:00
Image This drawing shows key jamb details for an “outie” window installation using a fluid-applied flashing on a wall with a fluid-applied water and air control layer and continuous insulation Publication Date Mon, 07/15/2024 - 12:00
Image Right - New flashing has been installed to complete the air and water control layers at the window openings of this wall retrofit that includes insulating the wall cavities with spray foam
Image This windows in this very old building in the Virgin Islands are protected from hurricanes with robust shutters constructed of 2x4 lumber, bolted connections, and heavy metal hinges. Publication Date Mon, 08/01/2011 - 12:00
Image When the EIFS siding on this house gave way in high winds, it revealed severe rotting of the sheathing beneath the windows due to long-term water leakage. Publication Date Mon, 08/01/2011 - 12:00
Image A liquid-applied water barrier covers the walls, serving as a drainage plane, air and vapor barrier, and secondary window flashing beneath the rigid foam that will be installed next. Publication Date Wed, 01/01/2014 - 12:00
Image Portable air conditioners offer flexibility with where they are located, but usually need to be installed near a window as they require one or two intake/exhaust ducts connected to the exterior
Image Triple-pane windows use three panes of glass separated by gaps filled with krypton or argon gas, insulated spacers, and low-emissivity coatings to achieve high insulation performance Publication Date Mon, 01/01/2024 - 12:00
Image Right – This National Fenestration Rating Council (NFRC) label shows the insulation U-Factor, solar heat gain coefficient, visible transmittance, and condensation resistance for this triple-pane window. Publication Date Thu, 09/30/2021 - 12:00
Image Vertical side-shading, such as these side fins, can provide effective summertime shading for north-facing windows, but are generally not recommended for other orientations due to their marginal performance and restricted views Publication Date Thu, 06/22/2023 - 12:00
Image Right - Tape flashing keeps moisture out around and below the window; extra tape reinforces the corners to prevent tearing of the house wrap and to keep water out of this critical juncture. Publication Date Fri, 12/31/2021 - 12:00
Image Water-proof materials cover the exterior side of crawlspace windows in a crawlspace retrofit, while foil-faced rigid foams seals and insulates the inside face of the openings Publication Date Mon, 09/01/2014 - 12:00
Image This climate zone map is used by the Attachments Energy Rating Council to provide guidance on whether to focus on their cool climate or warm climate ratings when selecting window attachments for a given location. Publication Date Tue, 07/18/2023 - 12:00
Image A continuous bead of sealant is installed to air seal along the top and bottom plates at all exterior walls and intersecting interior walls as well as around windows in exterior walls Publication Date Sun, 04/21/2024 - 12:00
Image Architectural awnings offer year-round weather protection and keep overhead summer sun off windows while allowing lower winter sun to provide beneficial warmth. Publication Date Wed, 12/29/2021 - 12:00
Image Comparison of three homes showing the amount of wall insulation needed to achieve a whole-wall insulation value of R-19 when the wall has double- versus triple-pane windows Publication Date Mon, 01/01/2024 - 12:00
Image A dormer with an openable window (not shown) can provide access to the roof if flood waters rise too high and too quickly; the dormer should be properly insulated, flashed, and air sealed
Image Wrong – This multi family building appears to be done in traditional southwest architecture but the lack of useful overhangs, dark colored walls, and lack of tinting on windows will result in significant solar heat gain. Publication Date Fri, 09/30/2022 - 12:00
Image Wrong – This kitchen exhaust fan is not located directly above the stove top so it will be ineffective at removing cooking pollutants and it terminates within 3 feet of an operable window, which is prohibited by code.
Image Right – The double-pane windows have low-emissivity coatings on three surfaces to reduce heat transfer through the glass allowing in views but preventing heat loss in winter and heat gain in summer. Publication Date Thu, 09/30/2021 - 12:00
Image A water-resistant membrane that takes the place of house wrap is sprayed is painted over seams and window framing then sprayed over the entire wall to provide a weather-resistant air barrier. Publication Date Wed, 01/01/2014 - 12:00
Image Right - Dense vines growing on a covered trellis along the west side of this home provide effective shade for the wall and windows and create a shaded, protected walkway and outdoor seating area. Publication Date Thu, 09/29/2022 - 12:00
Image Instead of solid timber headers over windows, insulated headers can be used consisting of prefabricated structural insulated panels or site-fabricated with two sheets of plywood sandwiching a layer of rigid foam. Publication Date Thu, 09/01/2011 - 12:00
Image A cool room should have low enough heat gains to be easily cooled by a small single-zone cooling system such as a mini-split or a window air-conditioner as shown here Publication Date Mon, 11/14/2022 - 12:00
Image The design of this home incorporates multiple methods to reduce summertime solar gains including roll-down exterior blinds, wide exterior horizontal louvers, minimized east/west-facing windows, and vegetation.
Image Wrong – the sheathing tape is properly installed to cover all seams in the coated sheathing but the flexible sill flashing product is not consistently installed or fully adhered around the window sills and is missing or lapped at some corners. Publication Date Fri, 12/31/2021 - 12:00
Image An interior shade that closes from the bottom up can work in conjunction with an exterior overhang to block lower-angle sunlight while still allowing view through the upper portion of the window that is shaded by the overhang. Publication Date Wed, 07/26/2023 - 12:00
Image Right: This house plan orients broad building surfaces away from the west and east, trees are used to shade the west and east, and large overhangs shade windows on the south wall Publication Date Fri, 09/24/2021 - 12:00
Image Right – Smart equipment for homes may include a tablet or touchpad from which the homeowner can control lighting, HVAC, window shades, security, music, and other home automation features. Publication Date Thu, 09/30/2021 - 12:00
Image Advanced framing details include open headers and reduced framing around windows and two-stud corners to allow more room for insulation in the wall cavities while reducing lumber costs. Publication Date Thu, 09/01/2011 - 12:00
Image Right - Brick veneer is installed with a 1-inch air space behind the brick, metal flashing and weep holes above and below the windows and at the base of the wall to direct out water that gets behind the brick. Publication Date Wed, 12/01/2004 - 12:00
Image Right – Foil-faced insulation was added after the crawlspace was dried and sealed by diverting water runoff, sealing off crawlspace windows and vents, and adding sump pumps and exhaust fan ventilation Publication Date Mon, 09/01/2014 - 12:00
Image Porch roofs, pergolas, and large overhangs can effectively shade windows and doors facing south, southeast, southwest, or even due east or west for most of the day if the overhang is very deep and sufficiently wide.
Image This overhang for a south-facing window provides full shade in the summer and full sun in the winter, optimizing savings in both cooling and heating energy (results shown for 2pm in both summer and winter, 36N latitude). Publication Date Tue, 07/25/2023 - 12:00
Image The south face of this home has an overhanging second floor, a pergola, and a roof eave to provide effective window and door shading for both floors in the summer without blocking view, diffuse daylighting, breezes, or ingress/egress
Image Wrong - Missing kick-out flashing to divert rainwater runoff into the gutter where the roof meets the wall has caused discoloration and water damage behind the stucco next to this second-story window.
Image In tropical climates such as Puerto Rico, some houses have metal jalousie louvers instead of glass windows; metal jalousies look like shutters, but typically offer little debris resistance. Publication Date Mon, 08/01/2011 - 12:00
Image This room has several passive and low-energy cooling features including a ceiling fan, fully operable French doors, window shading, an outdoor water feature, and light-colored hard-scaping. Publication Date Tue, 06/28/2022 - 12:00
Image A resilient multifamily building in Puerto Rico constructed of concrete on a raised slab foundation with a hip roof design for wind resistance and deep overhangs and permanent awnings to keep sun and rain off windows. Publication Date Tue, 01/01/2019 - 12:00
Image A 5,000- 6,000 Btu/hr air conditioner drawing about 500 watts can be installed in one window of a designated cool room (it is important that the installation is insulated and well-sealed
Image An NFRC glazing system energy performance label will report U-factor, solar heat gain coefficient, visible transmittance, and air leakage; if the window is ENERGY certified, the ENERGY STAR label will be located next to the NFRC label Publication Date Thu, 05/18/2023 - 12:00
Image The 2-foot overhang on the left performs better than the 2-foot vertical fin on the right for providing shade in the summer and solar heat gain in the winter (results shown for west-facing window, 2pm, 36N latitude). Publication Date Tue, 07/25/2023 - 12:00
Image The 8-foot-deep west-facing overhang on the left provides much better shading late in the day than the 2-foot-deep overhang on the right (results shown for west-facing window, late summer, 36N latitude). Publication Date Tue, 07/25/2023 - 12:00
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 Right – This home’s above-grade walls are constructed in a factory where wall panels of 2x6 studs are assembled and sheathed with a coated OSB product, then windows are installed and flashed before shipping the panels to the site for assembly by crane. Publication Date Thu, 09/30/2021 - 12:00
Image Windblown embers and firebrands are the most common cause of structural fires in wildfires, followed by fires started by radiant heat igniting surfaces or breaking windows and allowing embers in, followed by direct flame contact Publication Date Fri, 01/01/2021 - 12:00
Image Wrong - Missing kick-out flashing to divert rainwater runoff away from the house and into the gutter where the roof meets the wall has caused discoloration of the stucco and water damage behind the stucco by the front porch and the second-story window.
Image Each floor of this two-story modular home is constructed in a factory, including the 2x6, 24-inch on-center walls, R-21 fiberglass batt cavity insulation, and rigid exterior foam, housewrap, windows, and trim, then connected on site.
Image Right – This hot-humid climate home employs several hurricane- and termite-resistant features including concrete block construction, borate-treated framing, a hip roof design with metal drip edge, impact-rated windows, and an unvented attic. Publication Date Thu, 09/30/2021 - 12:00
Image This garage door was blown from its track by positive wind pressure and adhesive-set roof tiles were pulled up but the windows were protected by roll-up shutters from the 140 to 160 mph hurricane winds. Publication Date Mon, 08/01/2011 - 12:00
Image Right - In cooler climates, landscape shading should focus on the east- and west-facing walls, while leaving the south side of the house clear for solar access in winter (well-sized roof overhangs could provide summer shading for the south-facing windows) Publication Date Fri, 09/24/2021 - 12:00
Image The 8-foot deck/overhang on the left provides better summer shading than the 2-foot extended-width overhang, which performs better than the 2-foot window-width overhang, which performs better than the 2-foot vertical fin (late summer, 36N latitude) Publication Date Tue, 07/25/2023 - 12:00
Image This home survived the Laguna Beach fire of October 1993, which claimed more than 400 neighboring homes, thanks to a fire-resistant tile roof, stucco exterior, stucco-covered boxed eaves and under-decks, double-pane windows and selective landscaping Publication Date Fri, 12/08/2017 - 12:00
Image View-preserving interior solar screens such as these help reduce glare and solar heat gain while maintaining view to the outside Publication Date Mon, 11/14/2022 - 12:00
Image Sheer shades can provide very effective daylighting and glare control while maintaining a softened view to the outside Publication Date Tue, 11/03/2015 - 12:00
Image Pleated blinds provide cooling savings in summer by blocking and reflecting sunlight, while allowing some diffuse daylight to pass through.
Image The light-colored exterior roll-down shades on this building, and the shaded entryway provide very effective control of solar heat gain Publication Date Thu, 01/28/2021 - 12:00
Image Right - These interior solar screens help control glare and solar heat gain while maintaining view to the outside.
Image Multi-layer honeycomb cellular shades such as these can provide summertime energy savings by blocking and reflecting solar heat, as well as wintertime energy savings by providing added insulation. Publication Date Thu, 10/01/2015 - 12:00
Image Wrong – The flashing tape was not installed with a roller to completely adhere it to the OSB sheathing surface. Publication Date Mon, 09/30/2019 - 12:00
Image Wrong - Glazing failed due to windborne debris during a hurricane. Publication Date Tue, 09/01/2020 - 12:00
Image Right - Head flashing is good and carries water away from jamb. Publication Date Tue, 04/20/2021 - 12:00
Image Right - All gaps and joints are sealed to provide an airtight construction. Publication Date Fri, 12/31/2021 - 12:00
Image Right - The house wrap is properly flashed and taped, and all penetrations are properly flashed. Publication Date Fri, 10/15/2021 - 12:00
Image Baffles will keep insulation out of the soffit vents and wind out of the insulation in this vented attic. Publication Date Sun, 01/01/2017 - 12:00
Image Right- Landscaping shades the entry on the south west corner of this hot dry climate building. Publication Date Fri, 09/30/2022 - 12:00
Image Right – deeply inset entryways and overhangs provide shade to reduce solar heat entry to this building. Publication Date Fri, 09/30/2022 - 12:00