The pioneering cavity closer former specialists

Cavalok is the leading cavity closer specialist in the UK. We are pioneers in the manufacture of frame-forming cavity closers for window and door openings in all types of building.

Environmental champions
Cavalok was the first company to manufacture cavity closers entirely from 100% post-consumer PVC-U, meeting the growing demand for more environmentally friendly building products.

Cavalok cavity closers are now one of the most widely used post-consumer recycled building products in the UK.

We have also developed the advanced BigBlok cavity closer to fit the wider cavities increasingly being specified to achieve improved thermal efficiency in buildings.

In fact, our innovative products have been used to build new houses that achieve Level 6 in the Code for Sustainable Homes. Our commitment to constantly improving environmental best practice remains undiminished.

A Eurocell company
The company was founded in 1999 and in 2008 became part of the Eurocell group. Eurocell is a the UK's largest PVC-U operation producing building products, window and door profiles and more with over 35 years’ experience in the industry.

Product and service excellence
Cavalok customers are assured of excellent value and an outstanding level of service delivered by our responsive, enthusiastic and customer-focused team.

We are constantly enhancing and improving our products to meet new regulatory and environmental requirements. All our products are designed to meet or exceed Building Regulations.

Cavalok cavity closers are probably the most widely used in the country – saving time, energy and costs on building sites up and down the UK.

Serving the UK’s leading builders and installers
Our customers and end-users include some of the largest housebuilders, window suppliers and fitters, building merchants and window fabricators in the UK and Ireland.

Get in touch
If you’d like to know more about Cavalok, our products or our service levels, please contact us today.

Registered in England No. 2218483
Cavalok Building Products, Fairbrook House, Clover Nook Road, Alfreton, Derbyshire DE55 4RF.
VAT No. GB616751731