Showing results 1 - 83 of 83
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These folding louvered porch doors provide effective shade from low-angle east and west sunlight and can open for views; the photovoltaic panels overhead allow in filtered natural light
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A cross-section of a vinyl-framed window showing metal reinforcement which helps support the window and prevent collapse if exposed to heat from a fire.
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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
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A metal storm panel is installed in a track permanently mounted above and below the window frame and secured with wing nuts to studs mounted on the track.
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A piece of siding is used as sill extension and to provide slope in the opening for the window, which is deeper because exterior rigid foam has been added
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Accordion-type hurricane shutters protect sliding glass doors from high winds and wind-borne debris.
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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
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Anchorage failure in sliding glass doors due to negative pressures from hurricane force winds.
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Calculate projection factor (PF) by dividing overhang (A) by length of window (B).
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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
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Clerestory windows bring light in from above, reflecting it off of surfaces, making it more appealing than the direct light that comes from skylights
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End conditions for braced wall lines with continuous sheathing, Figure R602.10.7 in the IRC
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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
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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
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Exterior shading devices such as awnings or overhangs can significantly reduce cooling loads
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External solar screens are an effective way to reduce solar heat gains through windows while maintaining view.
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Failure of Roof Structure from Pressurization Due to Window Failure During a Hurricane.
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Hurricane force winds that breach external windows and doors can then cause failure of the entire building due to internal pressures on walls and roof.
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Hurricane shutter styles include colonial, Bahama, roll-up, and accordion shutters.
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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.
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Infrared photometry shows the impact of a roof overhang on the south façade of a home, where the unshaded patio stonework is significantly hotter than the shaded portions of the patio and wall surfaces (temperature scale shown is in Celsius).
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Installation of permanent exterior low-E storm windows is simple and easy, requiring a few basic tools and about 20 minutes of labor
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Interior storm windows have very little impact on the appearance of the window, although the window frame may appear slightly wider
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Jalousie windows use shutters rather than glass over the window openings to allow for maximum ventilation. Screens may be installed to keep out insects.
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Landscaping and Bahama shutters can provide important shade for a designated cool room
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Likely amount of time and radiant heat exposure at which different types of window glass would break at 30 feet from the edge of a wildfire.
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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
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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
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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
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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.
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Permanent options for keeping sun off windows to minimize solar heat gain include permanent overhangs and awnings, frames, and louvers.
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Pleated blinds provide cooling savings in summer by blocking and reflecting sunlight, while allowing some diffuse daylight to pass through.
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Plywood or OSB panels are a cost-effective way to protect windows from wind-borne debris.
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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.
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Radiant heat from wildfires can crack windows by heating the exterior surface (#1) causing it to expand and crack when exposed to wildfire.
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Removable options for keeping sun off windows to minimize solar heat gain include awning, retractable and swinging shutters, interior or exterior curtains.
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Right - Covered porches protect the south-facing windows and doors of this building from solar heat gain.
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Right - Automatic metal roller shutters are always in place and can be electronically or manually opened and closed.
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Right - Impact-resistant glass protects windows from wind-borne debris and is always in place, requiring no manual deployment during a storm.
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Right - Panels of 7/16-inch treated plywood are inexpensive but take time to install and are difficult to install on higher windows.
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Right - These homes have hurricane shutters to protect against high winds and to provide solar control.
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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.
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Right - This house has key features to block heat such as such as tree shading for the west wall and roof, minimized west-facing windows, and a porch roof, floor, and wing walls creating deep architectural overhangs and fins to shade south-facing windows
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Right – Deep overhangs, pergolas, and covered entryways minimize heat gain in this commercial building in the hot-dry climate.
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Right – deeply inset entryways and overhangs provide shade to reduce solar heat entry to this building.
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Right – Flashing is installed around chimney, skylight, vents, dormers, in valleys and at eaves
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Right – Horizontal overhangs on this house block sunlight in the summer while allowing it in during winter
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Right – Strategically placed trees provide shade to the south-facing windows of this building.
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Right – the building on the right employs light-colored walls, deep tinting, and deeply recessed windows to minimize solar heat gain
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Right – thermal mass walls, small windows, and recessed porch and trees on the south side of this southwest home help to minimize solar heat gain.
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Right – This aluminum jalousie window provides solar control while allowing view and ventilation.
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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.
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Right – This model home for the Solar Decathlon competition incorporates vertical trellises and retractable exterior blinds to control solar heat gain.
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Right- Landscaping shades the entry on the south west corner of this hot dry climate building.
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Seven categories of exterior window shading attachments, identified on the DOE Efficient Window Coverings website.
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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.
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The addition of low-E permanent exterior storm windows is typically accepted for most historic preservation projects
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The Attachments Energy Rating Council (AERC) uses this label to indicate certified low-E storm window products.
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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.
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The DOE Efficient Window Coverings website identifies twelve categories of interior window shading attachments.
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The Efficient Window Coverings website allows direct comparison of various window attachment types based on thermal, visual, functional, and installation and durability criteria.
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The light-colored exterior roll-down shades on this building, and the shaded entryway provide very effective control of solar heat gain
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The operable windows in this house are located at occupant level to provide comfort ventilation.
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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
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The unprotected glazing in this door was broken by roof tiles dislodged by wind.
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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
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There are multiple options for exterior shading of east and west facing glazing systems to avoid direct beam radiation
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These aluminum Bahama shutters shade west-facing windows from afternoon sun and are approved for hurricane protection
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These interior storm windows have low-emissivity coatings to let in light while keeping out heat in the summer and keeping heat in in the winter
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This hot climate zone home uses high quality batt insulation to insulate truss-joist headers.
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This metal shutter has top and bottom tracks that are permanently anchored to the wall (FEMA 577).
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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
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With modern low-E storm windows, manufacturers offer many frame colors and the option for custom color matching
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Wrong - Glazing failed due to windborne debris during a hurricane.
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Wrong - The window lying on the ground was protected by a shutter but the shutter was attached to the window frame, rather than directly to the wall framing.
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Wrong - this building provides no overhangs, minimal window shading, and clear window glass resulting in high solar heat gain.
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Wrong – Regular window glass is susceptible to breakage from the radiant heat of a wildfire; tempered and laminated glass are more resistant to breakage.
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Wrong – The outer pane of this window broke under radiant exposure from a neighbor’s house that had ignited in a 2007 southern California wildfire.
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Wrong – The south side of this building in Arizona has very little architectural or landscape shading to block solar heat gain.
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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.
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Wrong – Window not protected and failed due to windborne debris in hurricane force winds.