Welcome to Nationwide Frame Services (NW) Limited

Windows, Doors and Conservatories

Cavalok Cavity Closers

‘Cavity Closers have become a critical building component that’s now widely used in all commercial and residential new-build projects. They are undoubtedly the simplest and most effective way to seal cavities around wall openings and provide a rigid template for bricklaying and window or door installation’.

At Nationwide Frame Services we supply around 600-700 Closers per week to around 100 live sites, catering for different cavity sizes (75mm, 90mm, 100mm, 125mm and 150mm) and catering for different specifications such as check reveals and fire proofing. Our undisputed relationship with Eurocell allows us to work on a 1-2 week lead time from point of call-off to delivery on site and also helps us keep up to speed with latest innovations and regulation changes.

For further information on Cavalok Cavity Closers please visit


Our Peugeot MaxiMovers allow us to deliver up to 125 Closers at a time.