Warranty Information and Resources

Egress requirements specify a minimum window opening size that must be large enough to crawl through in case of an emergency.

When determining the size of an egress window note the following:

• The International Building Code states that every bedroom must have at least one egress window, measuring at least 5.7 square feet, with dimensions of 20 inches wide by 24 inches high. The window’s opening must be no more than 44 inches above the floor.
• Egress windows in basements must be at least 36 inches in width and height and fully open. If the window is over 44 inches from the ground, a ladder or steps at least 12 inches wide are required.
• These requirements can vary from region to region, please consult your local building code official for the specific egress requirements in your area.

Ply Gem does not install windows and doors but products are sold to an extensive network of qualified contractors and builders. Installation instructions and resources are available to aid in accurate installation.

To ensure proper window installation, follow the provided installation instructions and the ASTM Standard Practice for Installation of Exterior Windows, Doors, and Skylights.

Perform a visual and functional inspection of each window to help ensure they are installed properly.

•  Look for any visible gaps between the window frame and the wall.
• Check caulking has been properly applied to the interior and exterior.
• Make sure windows operate properly and the locking system can be engaged.
• Feel around the window frame for drafts.

The terms Design Pressure (DP), Performance Grade (PG), and Structural Test Pressure (STP) are crucial elements of window and patio door testing. Each term addresses unique aspects of window and door testing.

Design Pressure (DP) focuses on structural strength and represents the maximum wind load, in pounds per square foot, a window or door can withstand without breaking or deforming.

Performance Grade (PG) evaluates multiple aspects of window and door performance, including structural strength, air infiltration resistance and water penetration resistance.

Structural Test Pressure (STP) also focuses on structural strength, STP applies a higher pressure during testing to verify the component’s ability to withstand extreme loads. The design pressure is often exceeded by a specified percentage to ensure it meets specified safety margins.

Window glass can crack when a mechanical force is applied. It can also crack due to thermal force from large temperature differences between parts of the window.

Mechanical forces may include wind, flexing of the window frame due to house settling, or excessive construction or hammering close to the window. Glass is not a homogenous product by nature, and it is not stable under stress from temperature changes.

Thermal stress occurs due to a temperature difference between the center of the glass and its edges. Typically, a temperature difference of 30°C can lead to cracking. Various environmental factors can contribute to this temperature variation for example:

• A cold night followed by a bright sunny morning can rapidly heat the center of the glass.
• Other factors include shadows cast by roof overhangs, landscaping, or nearby buildings.
• Use of internally applied films or coatings on the window.
• Closing of reflective or light-colored Venetian blinds during the hottest part of the day.

The above types of cracks are extremely hard to predict, and the cause is practically impossible to determine. This is why Ply Gem does not offer a warranty for this type of window cracking.

Lighter, shallow glass scratches can be removed with readily available polishing compounds. Use your fingernail to check the depth of the scratch. If it fits within the scratch, the damage is likely too deep to repair. Regularly cleaning your glass helps prevent dirt and debris from etching into the surface and causing lasting damage.

Light vinyl scratches can be polished out with a small amount of scouring powder, depending on their depth. Then, finish with cream wax or polish.

Here are a few tips to help homeowners control moisture levels in their homes and decrease the chances of window condensation.

• Use exhaust fans in the kitchen and bathroom to reduce moisture released from cooking and showering.
• Make sure your attic, basement, and crawl spaces are well-ventilated and free from obstructions.
• Open curtains and blinds to allow more air circulation around windows.
• Check your dryer exhaust vent to make sure it is properly working.
• Adjust your furnace humidifier based on the outside air temperature to achieve ideal interior humidity levels.
• Run a dehumidifier in rooms experiencing condensation