Capital Valley Plastics

Manufacturers of Gas Barriers, Damp Proof Membrane & DPC since 1987

Founded in 1987, CVP is an award winning manufacturer based in Cwmavon (South Wales). Situated within its own private grounds in the Welsh valleys, we have proven that industry can work with nature.

Our efforts to pro-actively and relentlessly improve our methodology behind every aspect of the business means that we are able to provide leading edge products with a sophisticated and reputable service.

Our Products


Radbar products are a specialist group of materials for the building industry, that have optimum technical specification and value for money. They include specialist damp proof courses, radon barriers, gas barriers and hydrocarbon barriers.


At Capital Valley Plastics we also manufacture a full range of entry level products, including damp proof membranes, general purpose sheeting and damp proof course. All of these are 100% recycled where building regulations allow.


Latest News

Delivery delays

  Please bear with us on deliveries, our transport partners are struggling to get lorries through to us in the South Wales Valleys, we have had well over a foot of snow! Well done to Andrew, Phil and Mike for…

11 Dec 2017
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New Approved Radbar Installers

Argent Developers Limited, of Benfleet Essex, are the newest addition to the Radbar Approved Installers Register. Project Manager, John Denham and his team are experienced in membrane installation and showed an excellent understanding of the installation methodology of gas membranes,…

27 Nov 2017
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