Cavity Closers & Stop Socks

We have a range of cavity closers and stock socks for thermal and fire applications. All our products are available at competitive market prices, so you can be sure you receive the best value for the product you order. On all orders over £50, we also offer free next-day delivery to your site, office or home. 

Cavity closers are a crucial part of modern construction, offering benefits such as reduced heat loss and prevention of water ingress. We would always suggest installing a cavity closer where appropriate, as they extend the longevity and efficiency of the building. To familiarise yourself with cavity closer building regulations, you can read our blog post regarding this. 

We also have a large stock of cavity stop socks. They help to restrict the spread of fire and smoke within the cavity of an external masonry wall. They are ideal for providing a cavity barrier inside an exterior wall cavity. In Approved Document B, it is required that you close a cavity at the eaves level, and you can achieve just that with Fastbuild's cavity stop socks. 

Please browse our range of cavity closers and stop socks to find the perfect trade product for your needs.