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Basement Waterproofing

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  1. PermaSEAL 8 Geodrain Membrane 20m
    PermaSEAL 8 Geodrain Membrane 20m²
    £107.50 Ex VAT
    £129.00 Inc VAT
  2. PermaSEAL 8 Geodrain Membrane 40m²
    PermaSEAL 8 Geodrain Membrane 40m²
    £199.50 Ex VAT
    £239.40 Inc VAT
  3. 100% RECYCLED
    PermaSEAL 8 Eco Cavity Drain Membrane for Floors & Walls
    PermaSEAL 8 Eco Cavity Drain Membrane for Floors & Walls 40m²
    £89.00 Ex VAT
    £106.80 Inc VAT
  4. NEW MODEL
    PermaSEAL 20 Geodrain Membrane
    PermaSEAL 20 Geodrain Membrane 20m²
    £140.00 Ex VAT
    £168.00 Inc VAT
  5. PermaSEAL Geodrain Capping Strip
    PermaSEAL Geodrain Capping Strip
    £7.70 Ex VAT
    £9.24 Inc VAT
  6. PermaSEAL Jointing Tape
    PermaSEAL Jointing Tape
    £25.50 Ex VAT
    £30.60 Inc VAT
  7. PermaSEAL Double-Sided Jointing Tape 50mm x 10m
    PermaSEAL Double-Sided Jointing Tape 50mm x 10m
    £7.20 Ex VAT
    £8.64 Inc VAT
  8. PermaSEAL Quick Plug
    PermaSEAL Quick Plugs Box of 100
    Rating:
    100%
    £44.40 Ex VAT
    £53.28 Inc VAT
  9. PermaSEAL Damp Proof Paint 5 Litres
    PermaSEAL Damp Proof Paint 5L
    Rating:
    98%
    £28.50 Ex VAT
    £34.20 Inc VAT
  10. PermaSEAL Flexible Tanking Slurry
    PermaSEAL Flexible Tanking Slurry
    £70.00 Ex VAT
    £84.00 Inc VAT
  11. Super Strength Membrane Adhesive - 310ml
    PM Power Fix - Super Strength Membrane Adhesive - 310ml
    £9.70 Ex VAT
    £11.64 Inc VAT
  12. Remmers MB 2K Plus - Flexible Tanking Slurry
    Multi Tight MB 2K Plus - Flexible Tanking Slurry
    Rating:
    96%
    £137.50 Ex VAT
    £165.00 Inc VAT
  13. Aida Kiesol 5 Litre
    Kiesol MB Primer 10L
    £33.40 Ex VAT
    £40.08 Inc VAT
  14. Hydroprufe Primer
    Hydroprufe Primer 5L
    £56.00 Ex VAT
    £67.20 Inc VAT
  15. PermaSEAL Self-Adhesive Tanking Membrane 15m²
    PermaSEAL Self-Adhesive Tanking Membrane 15m²
    £120.00 Ex VAT
    £144.00 Inc VAT
    Out of stock
  16. Hydroprufe 3000 Self-Adhesive Tanking Membrane 1m x 20m
    Hydroprufe 3000 Self-Adhesive Tanking Membrane 20m²
    £175.00 Ex VAT
    £210.00 Inc VAT
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Learn more about External Waterproofing

External Waterproofing Systems for Basements

Conventional barrier tanking that is subjected to water pressure from the surrounding ground will fail unless the barrier is 100% defect-free. Even a land drain cannot effectively deal with perched or trapped water higher up against the water retaining wall. With the rise of local water tables, more and more basements and earth retaining foundation walls are being subjected to hydrostatic water pressure leading to water ingress into the building.

If a system is put in place to alleviate the hydrostatic pressure from the waterproofing system, the risk of failure is significantly reduced.

The Permagard External Structural Waterproofing System is designed to firstly waterproof the substrate with a brush or trowel applied liquid waterproofing material then remove hydrostatic water pressure from the building with a specially designed Cavity drain membrane - the PermaSEAL Geodrain .

Newton 410 Geodrain

Priming:

A spray application of Aida Kiesol silification spray causes the masonry pores to narrow making the surface water repellent. This also chemically binds the bitumen waterproofing product to the substrate.

Primary waterproofing:

Two coat application of one of the external waterproofing coatings to create a flexible high build waterproof coating.

Secondary waterproofing:

Cover the surface with PermaSEAL 8 Geodrain Membrane or PermaSEAL 20 Geodrain Membrane or Newton's Geodrain cavity drainage membrane. These products allow water from the surrounding media to freely drain through the filter fabric into the cavity created by the studs. The water then drops down to the land or French drain situated below floor level, which in turn takes the water away to a suitable drainage point. These cavity drainage membranes immediately alleviate the hydrostatic water pressure from the building. You also have the option to use Hydroprufe 3000 - an external self-adhesive tanking membrane - in combination with these Geodrain membranes.  

The advantage of this external masonry waterproofing system is that a primary and secondary waterproofing barrier is created. This absolutely minimises the risk of defects. Also, the structural waterproofing system is highly flexible so if the building settles or moves in the future you can be safe in the knowledge that the external masonry waterproofing will move with the building and remain watertight.

Permagard - Providing Solutions. Inspiring Confidence.

If you require further information on External Structural Waterproofing please contact one of our technical advisors on 0117 982 3282. We’re here to help!

You can also benefit from big savings when you buy our PermaSEAL Geodrain Membranes in bulk.   

To find out more then read our Guide to External Waterproofing.