At Capital Valley Plastics we manufacture a full range of entry-level construction, commercial and domestic use products.
Many from 100% recycled material.

Our product range

Our products meet building regulations, national guidance recommendations and many are BBA certified. All are manufactured to ISO 9001 and 14001.

I am a contractor

All of our construction membranes are guaranteed for the lifetime of the building, and in 30 years of supply, we've never had a single failure.

I am a specifier

Our technical team put their knowledge and experience at your disposal. Full technical support is available, from product recommendations to installation advice.

I am a merchant

We are able to supply mixed pallet loads, as well as a wide range of accessories, making us a one-stop solution for damp proofing and gas protection needs.

I am a homeowner

You can be sure our highly tested and certified products will give you trouble-free protection and make your home a safer place.

Capital Valley Plastics

Welcome to Capital Valley Plastics, Manufacturers of RADBAR Gas Barriers, Damp Proof Membrane & DPC. Our Radbar products are a specialist group of materials developed specifically 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.

Founded in 1987, Capital Valley Plastics is a multi-award winning manufacturer based in the United Kingdom.

Our effort to continuously improve every aspect of the business means that we are able to provide industry leading solutions, together with excellent technical and customer service.

Capital Valley Plastics
From plastic waste, to pellets to product
Join our 100% recycling journey

Looking for Radbar?

The Radbar range includes specialist damp proof courses, radon barriers, gas barriers and hydrocarbon barriers.

Resources & downloads

Here you can obtain certificates, installation guides and more relating to Capital products.


Our state of the art recycling and manufacturing processes ensure that optimum performance is maintained alongside optimum sustainability.

Get in touch

Capital Valley Plastics Ltd
Cwmavon Works,
nr. Pontypool
Gwent NP4 8UW

01495 772255

Say hello