Exterior window casing
Exterior window casing refers to exterior facade architrave profiles (commonly known as architrave) engineered to surround window openings, conceal structural joints between window frames and masonry walls, and prevent wind-driven water intrusion. It imparts a polished architectural perimeter to building elevations. Manufactured from high-density rigid polyurethane, these exterior profiles deliver supplemental thermal resistance around window perimeters due to polyurethane's low thermal conductivity. They are completely waterproof and non-absorbent. Unlike expanded polystyrene (EPS) foam or brittle plaster casings, polyurethane casings boast dense hard surfaces resistant to severe hail strikes and physical impacts.
Frequently Asked Questions
What is the practical function of exterior window casing?
It seals perimeter gap joints against water ingress while improving edge weather resistance and aesthetic detailing on facades.
Is polyurethane exterior casing more durable than EPS polystyrene trim?
Yes, polyurethane features significantly higher density, will not crumble, sag, or break under heavy hail impact.