VCL – Vapour Control Layer

Capital Valley
Unit price per



Vapour Control Layer (VCL) is mostly used in timber frame constructions, but can also be used in a wide variety of other applications such as flooring and ceiling projects.

Price Includes VAT

VCL – Vapour Control Layer

Capital Vapour Control Layer

  • Suitable for wall, roof and floor constructions
  • Prevents condensation which reduces the chance of mould and rot
  • Protects concrete floors
  • Reduces heat loss and improves energy efficiency

The product is made with top grade material thus meeting NHBC standard 6.2.

The Vapour Control Layer (VCL) is made within strict working tolerances of our ISO9001 Management System.

Available in 

  • 2.5m x 50m 125mu gauge
  • 2.7m x 50m 125mu gauge
  • 4.0m x 50m 125mu gauge
  • 4m x 25m 250mu gauge Super (534 MNSG)

Ideal for keeping a structure protected during construction projects, for example, exposed roofs or door/window openings.

Advice & Guide to Vapour Control Layers

Each roll is uniquely labelled and registered. Various roll sizes to suit standard floor to ceiling measurements, reducing wastage and increasing efficiency. It is available in clear or green tint so fixing points are easy to locate through the product.

How to install the Capital Vapour Control Layer

VCL Membrane 125mu

This high-performance vapour control layer 125mu from Capital Valley Plastics minimises the risk of condensation within the structure of a building. It acts as a vapour barrier, restricting the passage of warm, moist air within the structure or the roof of a property. In turn, this dramatically reduces the risk of damp and rot developing within the fabric of a building.

A vapour control layer or VCL membrane is an important part of new build construction because condensation or water vapour can build up between the layers creating rot and mould.

Uses of Vapour Control Layer Membranes

Our high performance VCLs are suitable for wall, floor, and roof constructions. They are normally used with timber frame constructions and situated on the inside of the framework. 

This 125 micron vapour control layer is suitable for use with our range of cavity drain membranes, either above or below ground. It needs to incorporate a mechanically-fixed batten and board system with insulation to the cavity drain membrane.

Installing a Vapour Control Layer

VCLs should be located inside of the warm side of insulation – this is the room side of the structure. If you are using on timber framework, you should fix the VCL with nails. 

When installing a vapour control layer, make sure all laps and edges are fully sealed and taped. VCLs can be sealed using double-sided DPM tape. 


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. 
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