Fire rated cavity closers and cavity trays are essential components in modern UK cavity wall construction, offering protection against fire, moisture, and energy loss. While each serves a different purpose, together they provide a complete system that ensures walls are safe, durable, and compliant with building regulations. For contractors, housebuilders, and bricklayers, understanding and using these products correctly is key to high-quality construction.
A fire rated cavity closer is installed around window and door openings to seal the cavity. By doing so, it reduces heat loss, prevents cold bridging, and provides a fire-resistant barrier that slows the spread of flames through the cavity. Typically rated to resist fire for up to thirty minutes, these closers play a crucial role in meeting UK fire safety standards and protecting both buildings and occupants, working alongside reliable fixings such as Spechunter frame ties to help maintain secure and compliant openings.
Cavity trays, on the other hand, prevent moisture from penetrating the internal leaf of cavity walls. They are positioned above openings, at roof abutments, and along gable ends, acting as a stepped damp-proof course that channels water safely to weep vents. Pre-formed and easy to install, cavity trays are suitable for both new-build and refurbishment projects, ensuring walls remain dry and free from damp, mould, and structural damage.
In refurbishment or renovation projects, cavity trays are often required to replace old or damaged systems, or to accommodate changes in roof height and insulation. Combined with fire rated cavity closers, they create a complete protective system that addresses both fire and moisture concerns, improving overall building performance and longevity.
Together, fire rated cavity closers and cavity trays enhance the safety, thermal efficiency, and durability of cavity wall construction. Although small in size, their impact is significant, making them indispensable for modern UK homes and commercial buildings.