Order Helpline 01752 692 221 | Open today 8:00am-5:00pm

Cavity Drain Membrane Protecto-Drain Buttons - Box of 100

Product Code:
Est. Delivery: 1-2 Working Days
Shipping costs displayed in basket.
We can let you know when this product is back in stock.

This product is proving to be very popular and has unfortunately sold out.

Enter your email below and we'll notify you as soon as this product is back in stock:

Subject to stock availability, if products on a 24 hours service are ordered alongside products NOT on a 24 hours service, this may delay your whole order.

View Transport Policy

All delivery charges are included in the final shopping basket and are dependent on the products Scottish Highlands & the Islands where additional shipping charges will apply.

Please note that not all products will incur an additional delivery charge to the Scottish Highlands & the Islands – this is based on the costs from the manufacturer, distributor or courier providing shipping on our behalf. If your delivery address is in the Scottish Highlands and Islands, a member of our helpline team will contact you prior to processing your order should an additional delivery charge apply.

While we make every effort to ensure orders are delivered by the date required, we cannot guarantee availability from the manufacturer or the manufacturer's delivery schedules.

Any variation to web delivery date given will be advised to you by email or telephone. If we are unable to make delivery because access is not possible, we reserve the right to make a failed delivery charge.

£11.00 Incl. VAT
Oops! Please select from the options


Protecto-drain 8 is a dimpled HPDE membrane, sometimes called a CAVITY DRAIN or a FIN DRAIN,  for use against foundation walls, basements and subterranean concrete, waterproofed structures. It is designed to protect the structure against mechanical damage and to create an air gap between the waterproofing and the earth, producing a reliable drainage channel for groundwater to pass
down the surface of the structure and into a suitable sump or channel.  The membrane means that hydrostatic pressure does not develop within the structural layers, avoiding the risk of punctures and damp building up
They are lightweight and easy to install and fix. Installation is quick and very cost-effective.

Applications include:

  • Retaining walls
  • Walls built half exposed / half buried 
  • Abutment drainage
  • Gas dispersal & collection
  • Erosion control
  • Sports field drainage
  • Road construction
  • Basement waterproofing


Protecto-drain 8  Place the dimpled sheet against the foundation wall or structure and overlap each sheet by at least 20cm. The cups should face the structure on their underside, so that the open cup is facing the ground / earth / backfill.  For bonding each sheet together, install double-sided PROTECTO-TAPE along the full length of one sheet and remove the slip foil. 

Place one sheet on top of the other by pressing the open cups into those on the other sheet – the cups will fit neatly within the angled sides into the cup / button. The PROTECTO-TAPE is designed to hold  the  sheets in place temporarily  before  the  backfill  process  takes  place.  Sheets  can  also  be secured using clout nails and buttons (available from Wallbarn), clamped down with a batten fixed at the top of the membrane or fixed with a bolt gun

Fill the void behind the membrane with free-draining aggregate such as gravel or loose stones. The dimpled membrane should always be installed so that the top of it protrudes above the level of the backfill.


Pack Size Pack of 100


There are no product downloads to show.

Questions & Answers

There are currently no questions for this product.

Have a question about this product?


There are currently no reviews for this product

Products We Recommend


Product Enquiry Form

Cavity Drain Membrane Protecto-Drain Buttons - Box of 100

*Required Field

Would you like to empty your basket?

Yes No


It seems you are running an older version of Internet Explorer. Our site does not support these old browsers as they do not house the technology that allows our site to be safe and secure.

If you wish to access our site please either upgrade your browser or download an alternative.