Cavity Closers

Cavity closers help close the cavity around window and door openings in cavity walls, reducing heat loss and helping protect against moisture at the edges of the opening.

The right product depends on the cavity width, wall construction and whether fire resistance is required. Our range includes insulated cavity closers for improving thermal performance around openings, alongside fire-rated cavity closers for applications where a specified level of fire resistance is needed. 

Different sizes are available to suit common cavity widths. Browse our range below and compare cavity closers by cavity width, insulation performance, fire classification and suitability for your wall construction to find the right product for your project.