Windows & Doors Glossary for Erie Homeowners

An inert gas sealed between window panes that provides better insulation than air. Standard in modern energy-efficient windows suited to Erie's cold winters.

Water droplets forming on window surfaces. Interior condensation indicates high indoor humidity or poor window insulation. In Erie's winters, persistent condensation signals the need for window upgrades.

Windows with two layers of glass separated by an insulating gas-filled space. The minimum standard for energy efficiency in Erie's climate.

A window with two sashes that both slide vertically. The most common window style in Erie homes, offering good ventilation and easy cleaning.

The EPA certification for energy-efficient products. ENERGY STAR windows for Erie must meet Northern Climate Zone criteria with U-factor of 0.25 or lower.

A basement window large enough to serve as an emergency exit. Required by building code in all habitable basement rooms. Erie County enforces minimum size requirements for new installations.

Window frames made from pultruded fiberglass. Stronger and more dimensionally stable than vinyl, with excellent insulation properties. A premium option for Erie's extreme temperature swings.

Waterproof material installed around window openings to direct water away from the frame and wall. Proper flashing prevents the water damage common around windows in Erie's wet climate.

A microscopically thin metallic coating on window glass that reflects heat. Low-E windows keep heat inside during Erie's winters and reduce solar heat gain in summer.

A secondary exterior door installed in front of the entry door. Provides extra insulation, weather protection, and security. Popular in Erie for extending the life of entry doors.

A measurement of how much solar heat passes through a window. In Erie, a moderate SHGC (0.25 to 0.40) balances winter solar heating with summer cooling needs.

The movable part of a window that holds the glass. A broken sash mechanism causes windows to slide down or not stay open.

Windows with three layers of glass and two insulating spaces. Provide superior insulation and noise reduction. Recommended for north-facing walls and lake-exposed Erie homes.

A measurement of how well a window insulates. Lower U-factors mean better insulation. For Erie's climate, look for windows with a U-factor of 0.25 or lower.

Window frames made from PVC plastic. Vinyl frames resist moisture, do not conduct cold, and never need painting. The most popular and cost-effective option in Erie.

Flexible seals around doors and windows that block drafts. Erie's temperature cycles wear out weatherstripping faster than milder climates. Check and replace annually.