What is the purpose of a cavity closer?

A cavity closer is designed to fit within the cavity wall, precisely where windows and doors are installed. It serves several essential functions within a building, aimed at safeguarding it from various potential issues, including water infiltration, moisture, heat loss, and condensation.

Acting as a protective barrier, the cavity closer functions as a shield against external moisture and dampness, preventing them from permeating the cavity wall and entering the building. It also plays a crucial role in preventing heat from escaping through gaps. These versatile components can be employed across different construction types, including masonry, timber frame, and steel frame systems.

What sets insulated cavity closers apart?

Insulated cavity closers share the core features of standard cavity closers, encompassing a damp-proof membrane to counter moisture infiltration (which can lead to dampness and condensation) alongside PVC extrusions and a flexible seal. However, the key differentiator lies in the inclusion of an insulating layer in insulated cavity closers. This insulating layer, often made from materials like XPS insulation, significantly enhances the thermal insulating capabilities of the cavity closer. Insulated cavity closers find particular utility in projects where factors such as sustainability, minimal energy consumption, and robust insulation are of paramount importance.