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

NMBS Exhibition

Busy day at the Ricoh Arena, Coventry for this years NMBS show                                      

06 Apr 2017
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Geosynthetic Technology LTD become approved Radbar Installers

        Geosynthetic Technology Ltd. approved  installers for the Radbar range of gas barrier membranes. GT are currently installing Radbar Flexi Hydrocarbon GX Membrane on a housing development in Kent. The first two plots have not only been…

13 Mar 2017
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