Waterproofing: Should I use a Liquid Coating or a Sheet Membrane?

This article is part of a series about the waterproofing of buildings and constructions. It is relevant to residential and commercial buildings as well as civil engineering projects. It applies to both new build and for repairing an existing building. If you have a commercial project for which you require waterproofing products please contact us.

If you have a roof, wall, floor or foundation etc. that needs waterproofing, then you will need to apply a waterproofing membrane. Waterproofing products fall into two broad categories. These are liquid applied and sheet membranes. This article explains the differences between the two types of product.

Key Takeaways

Liquid Applied Waterproofing Membranes:

  • Applied by brush, squeegee or airless spray.
  • May need more than one coat.
  • Thickness of membrane sensitive to good application.
  • Versatile - can be used for most applications.

Sheet Waterproofing Membranes:

  • Thickness of membrane guaranteed, but overlapping joint must be applied properly.
  • Torch applied membranes require flame gun for application. Used only for roofs and decking.
  • Self-adhesive membranes bond to substrate with pre-applied glue. Can be used for most applications.