Baseline 8 cavity drain membrane for basement walls and floors

5.0 of 5
Price incl. VAT
(42 items in stock)

Baseline 8 is a cavity drain membrane for tanking walls, floors and vaulted ceilings subject to high groundwater levels and persistent moisture.  This basement waterproofing membrane is moulded from high density polyethylene (HDPE) and incorporates integral 8mm stand-off studs at 25 mm centres. These waterproofing products are supplied in a choice of 40m2 and 48m2 rolls, each including an 80mm wide stud-free strip for overlapping sheets. Sizings are 2 x 20, or the choice of 2 x 2.4m

As a BS 8102: 2009 Type C compliant waterproofing membrane, Baseline 8 is suitable for use on masonry or concrete substrates and can be used in new construction or in existing buildings as part of a tanking system that delivers a Grade 3 dry environment in basements and cellars.

When used on walls, studs can be screwed to the membrane fixing plugs to secure a frame for dry-wall lining with plasterboard; when used on floors the impermeable surface permits direct laying of floors and concrete screeds.

To waterproof wall surfaces, Baseline 8 cavity drain tanking membrane typically requires:

  • 1 roll of waterproofing tape or 4 rolls of butyl rubber rope
  • 200 brick plugs with ready-mounted waterproof seals

For waterproofing floors, 1 roll of Baseline 8 waterproof membrane typically require:

  • 1 roll of waterproofing tape
  • 1 roll of corner tape for use at floor/wall abutments

Baseline 8 waterproofing membrane forms part of a sealed basement tanking system with cavity drainage for disposing of water accumulation in situations where water ingress is an issue.

  Baseline 8 Cavity Drain Membrane   Data
  Material   HDPE
  Sheet Thickness   0.8mm
  Membrane Height   8mm
  Stud Height   7mm
  Water Void Capacity   4.95L//m²
  Weight   0.5 Kg/m² 
  Water tightness at 60 kPa   >24 hours
  Working Temperature   -50°C to +80°C
  Softening Temperature   126°C
  Mean Compressive Strength   169 kN/m² 

Write a review

    Overall satisfaction
    Value for money
    Ease of use
  • Overall satisfaction
  • Quality
  • Value for money
  • Performance
  • Ease of use
25th Feb 2014, 22:42
Fast and efficient service, well impressed

Delivery options are only available for delivery to mainland UK (excluding Scottish Highlands, Scottish Islands, Channel Islands, Isle Of Man Northern Ireland and Eire). Delivery to Scottish Highlands, Scottish Islands, Channel Islands, Isle Of Man, Northern Ireland and Eire are limited to 20kg and are available at a Premium rate. Please contact us on or via our help line if delivery is required outside these areas. Alternatively select ‘World-wide Delivery’ and a member of our sales staff will contact you regarding your options and costs.


We offer for the mainland UK , as standard, a FREE delivery service on all orders having a value greater than £200.00 (excluding VAT). For orders having a value less than £200.00 (excluding VAT) a carriage fee of £8.50 + VAT will be levied. Goods will be sent by a national carrier on their 1-2 working day standard service. Customers must understand that delays can always happen while their order is with the courier, for this reason we can not guarantee your order will be with you next day.

It is important that the customer ensures that all the delivery details are correct and that the customer or someone acting for the customer is able to sign for the delivery. Twistfix accept no liability for failed deliveries as a result of incorrect delivery details or the absence of any authorised signatory. Twistfix will attempt delivery to the recipient between the hours of between 8am and 6pm. If no one is available to receive the delivery an attempt may be made to leave the item with a neighbour. Alternatively the carrier may return the item to the sorting office and leave a calling card at the recipient's address to advise of the attempted delivery. It is the responsibility of the customer to arrange to collect the item from the depot or to arrange re-delivery with the carrier. Further information regarding Delivery can be read at our Terms & Conditions.


Items returned and received in their original condition and packaging within 14 days of delivery will be accepted for exchange or refund subject to a 20% restocking fee. You will be responsible for the shipping costs incurred in returning the goods and should ensure the items are adequately insured while in transit to us. You should email to request to return items.

Where the goods are being returned because they are faulty or are not the goods that were ordered then, subject to the goods being returned in re-saleable condition, Twistfix will refund the cost of return shipping. Further information regarding Returns can be read at our Terms & Conditions.