Guides

Codes, condensation, glossary and fundamentals.

New to the topic? Start with the full guide to European windows and doors.

• Window Condensation: Causes, Dew Point and Why Ventilation Matters

  Window condensation forms when glass is colder than the dew point of the room air. Causes, humidity targets, what windows can and cannot do, and ventilation.

• Egress Window Requirements (IRC R310) and Tilt-Turn Windows

  IRC R310 egress openings need 5.7 sq ft net clear area, 24 in height, 20 in width and a sill no higher than 44 in. How tilt-turn windows fit.

• Window and Door Glossary (A-Z)

  A-Z glossary of window and door terms in US usage: U-factor, SHGC, NFRC, thermal break, sash, mullion, IGU, tilt-turn, lift-slide, rough opening and more.