Welcome to Cavalok Building Products


Featured Products

New Click In Corner Prep Tooling

Reduce fabrication time and improve corner strength.

new click in corner prep tool
New Cavalok Wall Chart for Download

Latest update now available in our download section.

download Cavalok wall chart 2012
New Metal Brick Tie

New metal brick tie for thin joint solutions.

new metal tie back

Cavalok Building Products

PVC-U cavity closers provide a rigid bricklaying template, window acceptor, damp-proof course and thermal break, all in one innovative, easy-to-fit product

Cavalok is the only manufacturer of BBA-accredited frame-forming cavity closer systems made entirely from 100% post-consumer recycled PVC-U. Cavalok cavity closers are the most widely used frame-forming closure in the UK, helping builders and installers to save time, cost and energy.

Cavity closers – the indispensable building component
PVC-U cavity closers have become a critical building component used in all commercial and residential new-build projects. They are the simplest, most effective way to seal cavities around wall openings and provide a rigid template for bricklaying and window or door installation.

What’s more, cavity closers enhance thermal efficiency, create a damp-proof course and prevent cold bridging. Fire-rated cavity closers can also act as a barrier to enhance fire protection in your buildings.

Fast and easy to fit – for quality-assured installations on every job
The simple clip-together cavity closer systems available from Cavalok require no tools, screws or adhesives to fit. That means you get a consistent, quality-assured installation every time.

Using PVC-U cavity closers eliminates the time-consuming process of fitting timber dummy formers for bricklaying, while improving the accuracy and precision of your door and window openings.

Closers with thermal efficiency built in – for Part L compliance
Cavalok cavity closers feature a pre-installed core of polystyrene insulation, providing enhanced thermal efficiency for compliance with Part L Building Regulations. The integral insulation also saves time on site because no additional insulation has to be fitted.

Choose the right cavity closer for your project
Cavalok offers a range of cavity closer products to fit cavities from 50mm to 300mm wide, catering for every type of building:

• Cavalok cavity closer – insulated closer for 50mm-100mm cavity walls

• FlameBlok – combined fire barrier and insulated cavity closer

• BigBlok – insulated cavity closer for buildings with wider cavities, from 125mm to 300mm wide

• Trade – versatile retrofit cavity closer for refurbishment projects

Sustainable cavity closers – made from 100% recycled material
With sustainability high on the agenda for all construction projects, Cavalok cavity closers are manufactured entirely from recycled post-consumer waste, making them the first choice for any new-build.

Post-consumer PVC-U comes from old window and door frames that have been removed from buildings. PVC-U can withstand repeated recycling and re-use, enabling it to deliver hundreds of years of service.

Cavity closer building accessories
Cavalok also manufactures a range of building components and window accessories to complement our cavity closers. These include the HeadVent window trickle ventilation system, the Cavalok window board receptor and structural closers to reduce air leakage.

Find out more…
For more information about any of our products, you can download our full suite of brochures. Or why not contact us today? We’ll be happy to advise you on the optimum cavity closer system for your next project.

Our Recycling Process

See how we take post consumer waste and recycle it into our sustainable PVC-U Cavity Closer.

Cavalok in action

Browse our case studies to see the Cavalok range in use.