Image The overhang on the left is much wider than the window, allowing it to provide better shade throughout the day than the overhang on the right, which is only the width of the window (results shown for south-facing window, late summer, 2pm, 36N latitude). Publication Date Tue, 07/25/2023 - 12:00
Image Wrong – The rough opening around window is not air sealed. Publication Date Fri, 10/28/2011 - 12:00
Image The window awnings on this house provide a simple but very effective way to reduce solar gains while still allowing view, daylight, and ventilation through the windows Publication Date Fri, 01/08/2021 - 12:00
Image Modern low-E storm windows can significantly improve the energy performance of the home by reducing both air infiltration and thermal conductance through the window assemblies
Image Right - This home's windows have protective coverings that are raised to provide shade in good weather and can drop to protect the windows during high wind events. Publication Date Tue, 01/01/2019 - 12:00
Image Jalousie windows use shutters rather than glass over the window openings to allow for maximum ventilation. Screens may be installed to keep out insects. Publication Date Tue, 01/01/2019 - 12:00
Image ENERGY STAR-qualified windows display the ENERGY STAR label Publication Date Wed, 01/01/2014 - 12:00
Image Exterior aluminum storm window showing weep channel, example 1 Publication Date Sat, 12/01/2012 - 12:00
Image Exterior aluminum storm window showing weep channel, example 2 Publication Date Sat, 12/01/2012 - 12:00
Image Example sill detail for window replacement without siding replacement Publication Date Sat, 12/01/2012 - 12:00
Image Example sill detail of replacement window in conjunction with siding replacement Publication Date Sat, 12/01/2012 - 12:00
Image ENERGY STAR V 6.0 climate-specific criteria for windows and skylights Publication Date Thu, 10/27/2022 - 12:00
Image Window attachments like insulated blinds, solar screens, and low-e storm windows provide many benefits including heating and cooling savings at a low first cost Publication Date Mon, 01/01/2024 - 12:00
Image Window coverings like insulated blinds, cellular shades, sun-blocking roller shades, and low-e storm windows can provide heating and cooling energy savings Publication Date Mon, 01/01/2024 - 12:00
Image The rough openings for the windows are flashed with a paint-on flashing product then the windows are installed and additional flashing tape is installed over the flashing. Nail holes are sealed with caulk.
Image Before installing the windows, the window rough openings are sealed with a liquid-applied flashing that provides a seamless moisture and air barrier to protect the wall from water intrusion. Publication Date Sun, 01/01/2017 - 12:00
Image Right – The framing around the window is thoroughly flashed with liquid flashing. Publication Date Mon, 09/30/2019 - 12:00
Image Right – The sheathing and window sills are sealed with a paint-on flashing. Publication Date Mon, 09/30/2019 - 12:00
Image Wrong - This IR image shows air leakage around a window. Publication Date Mon, 01/16/2017 - 12:00
Image Install impact resistant shutters for windows not rated as impact resistant Publication Date Sat, 08/01/2020 - 12:00
Image Right – This metal panel window shutter is installed in a track permanently mounted above and below the window frame and is secured with wing nuts to studs mounted on the track. Publication Date Wed, 12/01/2010 - 12:00
Image Wrong – For proper detailing of vinyl around windows and other obstacles, use utility trim, punch snaplocks into siding, and do not overlap directly beneath a window. Publication Date Wed, 12/01/2010 - 12:00
Image Even when wind is blowing parallel to a wall, an open casement window can create a zone of higher pressure near the window opening, driving airflow into the house Publication Date Fri, 09/24/2021 - 12:00
Image The Attachments Energy Rating Council (AERC) certifies storm windows. Publication Date Tue, 01/01/2019 - 12:00
Image Advanced framing details include minimal framing at windows and doors. Publication Date Fri, 10/28/2011 - 12:00
Image Wrong – Window has additional non-structural king stud Publication Date Fri, 10/28/2011 - 12:00
Image Right – Window framing has appropriate number of king studs Publication Date Fri, 10/28/2011 - 12:00
Image Right - This door and window have a permanent protective covering system. Publication Date Tue, 01/01/2019 - 12:00
Image Even with R-30 of insulation in the wall, its overall R-value is R-5 if it has single-pane windows; triple-pane windows bring that up to R-16 Publication Date Mon, 01/01/2024 - 12:00
Image Modern Low-E storm windows are typically kept up year-round but can be removed without damage to the existing window frame, an important consideration for historic preservation projects
Image Modern interior storm windows include new technology and sleek design features that offer an easy-to-install, cost-effective method for upgrading the energy efficiency of existing windows
Image Right – this commercial building employs good techniques to resist solar heat gain: awnings and pergolas over windows, recessed windows and entryways, deep tinting on glass, and shade plants. Publication Date Fri, 09/30/2022 - 12:00
Image Wrong - Water has leaked into the window assembly and has not been able to drain out, possibly due to blocked weep holes; thus, mold and moss are growing in the window assembly. Publication Date Thu, 10/10/2019 - 12:00
Image Right - House wrap is sealed to window flange with liquid-applied sealant. Publication Date Sat, 10/16/2021 - 12:00
Image Air-sealing tape carefully seals the seams around the window framing. Publication Date Sun, 01/01/2017 - 12:00
Image Casement windows or wing walls can create zones of higher pressure (right) and lower pressure (left) to encourage cross ventilation when wind is flowing parallel to window openings Publication Date Tue, 10/01/2019 - 12:00
Image Tempered glass windows usually have an etched marking on the glass in the corner of the window that includes the supplier's name, place of fabrication, date manufactured, thickness, and certifications or safety standards the glass meets. Publication Date Thu, 01/01/2009 - 12:00
Image A new high-performance window will be installed in the rough opening of this existing home Publication Date Fri, 06/30/2017 - 12:00
Image The Climate Zone Map for the ENERGY STAR Window, Door, and Skylight Specification Publication Date Sat, 01/01/2022 - 12:00
Image After installing the house wrap over the SIPS, window flashing is installed Publication Date Wed, 11/14/2012 - 12:00
Image Advanced framing details include insulated headers over windows and doors. Publication Date Fri, 10/28/2011 - 12:00
Image The operable windows in this house are located at occupant level to provide comfort ventilation. Publication Date Wed, 06/01/2016 - 12:00
Image Use this simple calculation to size overhangs above south facing windows. Publication Date Tue, 07/30/2019 - 12:00
Image Side and plan views of window-to-wall interface in masonry wall retrofit including three layers of rigid foam exterior insulation, box extensions, and flashing around new windows. Publication Date Fri, 08/13/2021 - 12:00
Image This thermal image of an interior storm window shows how much temperature change occurs between the interior storm window panel on the right, at 50F and the existing glass on left at approximately 0F
Image A paint-on flashing is used around the windows and doors for seamless water protection. Publication Date Wed, 06/01/2016 - 12:00
Image Right – Strategically placed trees provide shade to the south-facing windows of this building. Publication Date Fri, 09/30/2022 - 12:00
Image Failure of Roof Structure from Pressurization Due to Window Failure During a Hurricane. Publication Date Tue, 09/01/2020 - 12:00
Image ENERGY STAR offers this label for certified low-E storm windows in cool climates Publication Date Wed, 10/01/2014 - 12:00
Image ENERGY STAR offers this label for certified low-E storm windows in warm climates Publication Date Wed, 10/01/2014 - 12:00
Image The NFRC/ENERGY STAR label provides consumers with several performance ratings for a window Publication Date Thu, 10/19/2023 - 12:00
Image Air-seal the rough opening around doors and windows to minimize air leakage. Publication Date Fri, 10/28/2011 - 12:00
Image Calculate projection factor (PF) by dividing overhang (A) by length of window (B). Publication Date Fri, 01/01/2021 - 12:00
Image Wrong – Window not protected and failed due to windborne debris in hurricane force winds. Publication Date Fri, 04/01/2005 - 12:00
Image Right - Window shading is built into the south side of this home and east facing windows have been minimized to reduce heat gain from the summer sun while allowing low winter sun into the home
Image Exterior low-e storm windows were added to historic Halligan Hall on the U.S. Naval Academy campus in Annapolis, Maryland; frames were custom colored to match the existing seafoam green window trim
Image Right – This crawlspace window was completely sealed off on the inside and outside with air barrier and water-proof materials and the window well was filled in to an above-grade height to prevent bulk water from entering the crawlspace Publication Date Mon, 09/01/2014 - 12:00
Image Wrong – Where possible, design walls and specify window sizes and placement to minimize the use of studs around windows; and seal all wood-to-wood seams to minimize air leakage through walls. Publication Date Fri, 12/31/2021 - 12:00
Image Building energy codes often reference primary and secondary daylight when specifying daylighting control requirements – the primary daylight zone or distance into the room from the window equals the window height from the floor. Publication Date Mon, 01/20/2025 - 12:00
Image Right – This tree shades walls, windows, roofs, and grounds for two adjacent homes. Publication Date Thu, 09/29/2022 - 12:00
Image Large deciduous trees provide heat-blocking shade to the walls and windows of this house. Publication Date Fri, 09/09/2022 - 12:00
Image Right - Plywood storm protection covering for windows is installed with removable threaded-rod fittings.
Image Deep overhangs and porches provide midday shade for most of the windows on this home in Albuquerque, NM. Publication Date Thu, 10/01/2009 - 12:00
Image Wrong - There is no step flashing along the base of the gable and the right window is missing sill trim. Publication Date Sun, 05/30/2021 - 12:00
Image Version 3.0: Exhibit 1 ENERGY STAR Reference Design Home - Windows (Revision 9) Publication Date Sat, 09/01/2018 - 12:00
Image Version 3.1: Exhibit 1 ENERGY STAR Reference Design Home - Windows (Revision 9) Publication Date Sat, 09/01/2018 - 12:00
Image Right – This aluminum jalousie window provides solar control while allowing view and ventilation. Publication Date Tue, 01/01/2019 - 12:00
Image Window and door rough openings in the ICF wall are surrounded with pressure-treated wood Publication Date Mon, 01/01/2001 - 12:00
Image Types of window attachments include exterior attachments such as storm windows, fixed awnings, dynamic awnings, roller shutters, roller shades, and solar screens, and interior attachments such as drapes, louvered blinds, roller shades, surface applied fil Publication Date Mon, 01/01/2018 - 12:00
Image Right – Sheathing, rigid foam, and windows are installed in the factory for these factory-constructed wall panels. Publication Date Mon, 09/30/2019 - 12:00
Image The double-wall construction results in thick window sills which builder market as an architectural feature.
Image The addition of low-E permanent exterior storm windows is typically accepted for most historic preservation projects
Image Wrong - Window is missing pan flashing under sill and tape flashing at jamb end sill. Publication Date Wed, 07/07/2021 - 12:00
Image Right – The rough opening around window has been filled with backer-rod to air seal. Publication Date Fri, 10/28/2011 - 12:00
Image To get an average whole-wall R value of R-19 with double-pane windows, you’d need R-330 of wall insulation; triple-pane windows can achieve an R-19 total wall R Value with R-38 of insulation Publication Date Mon, 01/01/2024 - 12:00
Image A thin-triple window uses a narrow interior glass pane and narrower gaps between panels often filled with krypton, rather than argon gas, to achieve triple-pane performance with an IGU that fits in a double-pane window frame Publication Date Mon, 01/22/2024 - 12:00
Image Right – Appropriate use of framing members to support double windows and additional cripples for drywall purposes Publication Date Fri, 10/28/2011 - 12:00
Image Plywood or OSB panels are a cost-effective way to protect windows from wind-borne debris. Publication Date Wed, 12/01/2010 - 12:00
Image The Attachments Energy Rating Council (AERC) uses this label to indicate certified low-E storm window products. Publication Date Tue, 01/01/2019 - 12:00
Image In a comparison of two homes that were identical except for windows, the home with thin-triple-pane windows showed averaged winter heating savings of 12% annually, average cooling season savings of 28%, and peak savings of 17% to 33% compared to the home Publication Date Mon, 01/01/2024 - 12:00
Image The 2-foot extended-width overhang on the left allows more wintertime solar heat gain to this west-facing window than the 2-foot side fin on the right (results shown for west-facing window, mid-winter, 36N latitude) Publication Date Tue, 07/25/2023 - 12:00
Image Air seal door and window rough openings with backer rod, caulk, or nonexpanding foam Publication Date Mon, 04/12/2010 - 12:00
Image Permanent exterior low-E storm windows include weep channels in the bottom leg of the frame to allow for drainage Publication Date Wed, 09/01/2021 - 12:00
![Exhibit 1 - DOE ZERH Mandatory Window Requirements [Revision 07].](/sites/default/files/styles/thumbnail/public/images/Exhibit%201%20-%20DOE%20ZERH%20Mandatory%20Window%20Requirements%20%5BRevision%2007%5D.PNG?itok=LP0_yiq3){kind=small}
![Exhibit 2 - DOE ZERH Target Home Window Requirements [Revision 07].](/sites/default/files/styles/thumbnail/public/images/Exhibit%202%20-%20DOE%20ZERH%20Target%20Home%20Window%20Requirements%20%5BRevision%2007%5D.PNG?itok=3KgfexSh){kind=small}
