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

BS8485:2015 Test pass!

We are pleased to announce that the Radbar Flexi Hydrocarbon GX Membrane and Hydrocarbon DPC have both passed the ISO 15105-1 manometric test, these products now comply with BS8485:2015. For more information email

01 Jul 2016
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D & C May Energy Award Winner

We are very proud to announce that the D & C Energy Award Winner for May 2016 is…… Capital Valley plastics!  

20 May 2016
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