Window Insulation Collars. Sourced from premier brands, our curated selection includes insulation collars designed to fit seamlessly with your pitched roof windows. Explore various sizes tailored to your window specifications. These insulation collars prioritize thermal efficiency, preventing heat loss and ensuring a comfortable interior climate. Elevate your roofing project with sophistication using LB Supplies' Pitched Roof Window Insulation Collars—where energy efficiency meets thoughtful design, enhancing both the performance and insulation of your pitched roof windows. Discover the perfect solution for a cozy and well-insulated living space.