Platon P20 - Cavity Drain Membrane - 2m x 1.3m x 20mm

Unit price per



P20 cavity drain membrane is a high-quality waterproof basement tanking material recommended for use on walls, floors, vaults and tunnels with minimal surface preparation required.

Price Includes VAT

everbuild wood stain quik drying

Cavity Drain Membrane for internal use

  • BBA approved
  • Heavy-duty, deep studded HDPE cavity drain membrane
  • principally used on floors
  • For areas subject to high volume water penetration
  • Impermeable to water, gas and water vapour
  • Deep stud profile is designed to resist blockages

Available in 1.36m x 2.18m

Platon P20 is most often incorporated within the basement floor build-up and can be used above or below suitable closed-cell insulation, to accommodate the requirements for Aquachannel drainage.

Platon P20 Data Sheet

Cavity Drain Brochure

Platon P20 BBA Certification

P20 Declaration of Performance

P20 Guarantee

P20 Install Diagram

P20 is used in conjunction with Platon Sealing Rope, Overtape and Corner strip.

Also known as Isola Platon P20, Triton Isola Platon 20, Platon P20 & Cavity Drain Membrane.

The Platon P20 Membrane is manufactured from black high-density polyethene (PEH). It is impermeable and resistant to the usual chemicals in the building construction.

As a damp proof membrane, both the product and floor coverings may be installed independent of the moisture content in the underlying concrete construction and with running water, not under pressure in the air gap.

Studs are formed in a regular pattern on the one face of the Membrane. The studs are spaced at approx. 60mm centres. The product is supplied in sheets 1.36m x 2.18m and is cost-effective for smaller rooms.

Platon P20 is most often incorporated within the basement floor build-up and can be used above or below suitable closed cell insulation (contact the Technical Department for guidance), to accommodate the requirements for Aquachannel drainage. P20 is used in conjunction with Platon Sealing Rope, Overtape and Corner strip.

P20 carries a BBA certificate which is required to satisfy the requirements of Third Party Building Warranty providers (NHBC, LABC etc), it can be used within a standalone waterproofing system or as part of a combined strategy with other forms of waterproofing, depending on site conditions, planned use of the basement or below ground area and risk assessment.

Delivery within 2-5 days.  



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 £45 £90 Not Currently Available
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 3pm 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 Centre, 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 personalized quote. 
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