For Flat, Curved & Sloping Roofs

For Flat, Curved
& Sloping Roofs

25 Year Guarantee

25 Year

Specialist Advice & Support

Specialist Advice
& Support

Express National Delivery

Express National

We've waterproofed 180m SqM of roofs!

We've waterproofed
180m SqM of roofs!

Request a sample

a sample

Evalon V

Evalon V

Superior Single-Ply Waterproofing

Superior single ply waterproofing at its best.

  • Bitumen-free & solvent-free
  • UV Stable
  • Root-resistant
  • Fire load five times lower than that of a built-up felt roof
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Evalon® VSK

Evalon® VSK

EVA Membrane

The #1 self-adhesive waterproofing membrane

  • Self-adhesive underside coating
  • Bitumen-free & solvent-free
  • High adhesive strength
  • Ideal for steep slope or curved roof areas
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Evalon VG

Evalon VG

Superior Fire-Retarding Waterproofing

Superior Fire-Retarding Waterproofing

  • Compatible with bitumen
  • High thermal-mechanical resilience
  • Root and rhizome-resistant
  • High reflection of heat rays
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Evalon VGSK

Evalon VGSK

Superior Fire-Retarding Self-Adhered Waterproofing

  • Up to five times lower fire load compared to two-layer seals
  • Optimal vapour pressure compensation function of the polyester fleece or glass/polyester fleece backing
  • Self-adhesive underside coating
  • With the integrated fire protection layer, for direct bonding on unbacked rigid EPS foam boards
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The alwitra® system

Our waterproofing membranes are just part of our complete waterproofing system. Discover all our components.

Superior, long-lasting waterproofing membranes

alwitra® has been manufacturing the UK’s number 1 waterproofing membrane for almost 40 years and provides superior quality waterproofing systems to contractors, architects and developers.

Want to become an alwitra® accredited installer?

  • High-quality training
  • Become accredited
  • Receive new business leads from alwitra®

Apply Today

Our membranes are used by architects, contractors & developers. View all

Archdiocese of Liverpool
Coventry City Council
3D Reid
Balfour Beatty
Aloft Roofing & Leadwork
Fife Council
Angell Thompson
Alec French Architects
Ashtree Roofing
English Heritage
Glasgow Housing Association
Coomber Associates
Bay Roofing SW Ltd

Need expert advice or just have a question?

Our specialists are here to support you.
Just ask.

Contact Us 01202 785200

Here's what some of our clients have to say...

We have been alwitra® contractors for many years and have always been impressed with the results and reliability of the product. The customers…

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I, James Hopkins Director of JH Specialist Roofing install single ply membranes on a daily basis, we as a company have tried numerous types of…

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We have used VSK extensively over the last 5 years, we have found it to be a great product and really good for complex detail work. We find using…

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As a small flat roofing business carrying out mostly domestic refurb work and small extensions Evalon vsk is our preferred single ply membrane…

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We have been an approved contractor for many years, the level of customer service and the quality of the products provided by ICB (Waterproofing) is…

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We have worked with ICB on several occasions and we would thoroughly recommend them for their high level of professionalism and efficiency. The team…

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OB Architecture

ICB provides an excellent service with all the professional back-up required at the development stage through to completion. The manner in which you…

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I am pleased to recommend ICB as Company, through my personal experience and that of my Business, for the following reasons: They are an easy Company…

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We believe, as one of your approved contractors, over the years we have had a great working relationship with yourselves. When working on projects…

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Best system on the market –VSK all the way!!!!!!


…that’s the beauty of this membrane, (you) can complete field sheet and upstand in one go, nice and tight and (a) crisp finish in the…

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alwitra® is a lovely membrane when you have some detailing and gutters as you can go all the way through in a oner…


alwitra® Evalon VSK! Surely the best membrane ever invented.


This product has to be the most versatile single ply system we have used. Unbeatable finish.

Lee Orchard

Evalon VSK – such a quality and versatile membrane.

Lee Orchard

In my mind the best single ply.


Can’t beat VSK


We find all the staff at ICB, friendly, helpful & knowledgeable.


Evalon VSK! Surely the best single-ply waterproofing membrane ever produced! A++++


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