Damp Proof Membrane Vapour Barrier

Capital Valley
Unit price per



BBA approved Vapour barrier (waterproof membrane) is easy to lay, durable vapour control layer that prevents moisture seeping into concrete or timber frame. Ideal for buildings, small extensions, shed, outbuildings and garden office.

Price Includes VAT

Damp Proof Membrane Vapour Barrier

Damp Proof Membrane Vapour Barrier

  • BBA approved
  • Easy to lay
  • Durable high quality 100% recycled polythene
  • & waterproof
  • Rotproof

Available in

  • 4m x 3m 250mu (1000 gauge) Black or Blue
  • 4m x 3m 300mu (1200 gauge) Black or Blue
  • 4m x 5m 250mu (1000 gauge) Black or Blue
  • 4m x 5m 300mu (1200 gauge) Black or Blue

Vapour Barrier Assurance

  • Resistance to water and water vapour — the product, including joints, will resist the passage of moisture into the structure.
  • Resistance to puncture — the product has a high resistance to puncture and on a smooth or blinded surface will not be damaged by foot or site traffic.
  • Durability — under normal service conditions, the product will provide an effective barrier to the transmission of moisture for the life of the structure in which it is incorporated.

The vapour barrier is BBA (British Board of Agreement) certification allows you to view detailed technical information as well as giving peace of mind that the vapour control layer quality is independently assured.

This popular waterproof membrane is the most commonly used in the UK building industry. Manufacturing millions of rolls since 1987 that have helped fulfil thousands of projects around the UK and Europe. The vapour membrane is manufactured from high quality 100% recycled polythene making it an economical alternative to other membranes as well as being hugely environmentally friendly.

The rolls are made in a variety of thicknesses (see below) and come in a convenient multi-fold format for easy storage and handling. They are uniquely labelled and registered for complete traceability. All accessories to suit are available including Single/Double-sided tape, top hats, preformed corners and many more.

The vapour barrier can be installed:

  • as an oversite membrane, between a blinded hardcore bed and the base concrete slab.
  • as a sandwich membrane in a base concrete slab
  • between the base concrete slab and the screed.
  • the 300mu ideal for installing under laminate flooring and underfloor heating.

Vapour Barrier Data Sheet

Vapour Barrier Installation guide


Delivery within 2-5 days.  

BANK HOLIDAY: Next working day orders are dispatched on working days. Orders placed before 3pm Thursday will be dispatched Friday. After 3pm Thursday orders will be dispatched Tuesday for delivery Wednesday. 




Restricted Areas *

Next Working Day

(Order before 3pm for same day dispatch)

Under 2kg £4.95 £4.95 £7.95
Up to 30kg £6.95  £18 £10.95
30kg - 50kg £11.95 £25 £16.95
50kg - 100kg £18.95 £37.95 £27.95
100kg+ £45 £90 Not Currently Available
Click & Collect FREE FREE

Next working day delivery available on IN STOCK products.

Out of stock products will be delivered next working day from when they are received into the warehouse. 


Next Working Day Delivery Example

 Order placed Monday 11:30am Dispatched Monday pm Delivery Tuesday
Order placed Monday 4:30pm Dispatched Tuesday am Delivery Wednesday
Order placed Thursday 11:30am Dispatched Thursday pm Delivery Friday
Order placed Thursday 4:30pm Dispatched Friday am Delivery Monday


Click and Collect

Click and Collect available within one hour on orders placed between 8am and 3:30pm Monday to Friday (excluding Bank Holidays).
Orders placed outside of this time will be available within the next hour during the above slots. 
You will receive an email when your order is ready to collect. 
Collection Address: Unit 28, Ripley Business Park, Ripley Dr, Normanton Industrial Estate, Normanton WF6 1QT
*If you live in a restricted area and would like to query your shipping cost please call our customer service team (01977 876116) and they will be able to give you a personalised quote. 
Isle of Man IM1-IM9, IM99
Isle of Wight PO30-PO41


Aberdeen AB30, AB31, AB33-AB38, AB41-AB45, AB51-AB56, AB63, AB39 3, ZE1-ZE3 AB10-AB16, AB21-AB25, AB32, AB39
Ayrshire, Argyll & Bute KA27-KA28, PA20-PA49, PA60-PA78, PA80 KA26
Dumfries & Galloway DG1-DG16
Dundee DD8-DD11
Falkirk FK1-21
Galashiels TD15
Inverness IV1-IV28, IV30-IV32, IV36, IV40-IV49, IV51-IV56, IV63, IV99, HS1-HS9, KW1-KW17, PH19-PH26, PH30-PH44, PH49, PH50 PH10, PH11, PH13, PH14, PH17, PH18 PH8-PH16
Northern Ireland BT1-BT49, BT51-BT57, BT60-BT71, BT74-BT82, BT92-BT94