polyurethane window sill
Polyurethane window sill channels rainwater away from exterior walls while eliminating thermal bridges beneath window transoms.
Frequently Asked Questions
What is the purpose of a polyurethane window sill?
It diverts rainwater runoff away from exterior walls while providing window sill detail.
Why is polyurethane better than marble window sills?
It is lightweight, easy to install, prevents thermal bridging, and will not freeze-crack.