Home / Installation Products / Insulation Collars Insulation Collars Sort Sort by:Most popularWhat's newPrice low to highPrice high to lowName A to ZName Z to A Showing 1 of 1 Products Insulation Collars Showing products 1 to 1 of 1 Sort by:Most popularWhat's newPrice low to highPrice high to lowName A to ZName Z to A VELUX BDX insulation frame and underfelt collar From: £29.99