Wednesday, June 5, 2013

Waterproofing Information

Foundation waterproofing plays a critical role in keeping any type of basement dry under some of the most extreme conditions, so I went searching for the types and information that I'm seeing on other fellow builder blogs.  Here's some of the information I've found.

Liquid Membrane Waterproofing:
You apply a liquid membrane by spray, roller, or trowel. The liquid cures into a rubbery coating on the wall.  Liquid coatings have the advantages of quick application, low in-place cost, and excellent elongation. One of the chief disadvantages is the possible inconsistency in coverage. The typical application thickness is 60 mils, but it takes a careful applicator to be sure of always achieving that minimum coverage.

Sheet Membranes Waterproofing:
The most commonly specified sheet materials are self-adhering rubberized asphalt membranes. These 60-mil-thick membranes are composed of rubberized asphalt laminated to a waterproof polyethylene film. The asphalt side is incredibly sticky but is covered by a release paper, which you remove during application.  A chief advantage of sheet membranes is their consistent thickness. Because they're manufactured to exacting tolerances, you can be sure of the 60-mil coverage. These membranes also have good elongation.

A higher in-place cost is one of the main disadvantages of sheets. The cost of the material itself is likely to be greater on a square-foot basis than the liquid membranes. Labor cost is also higher, because of all the cutting, handling, reinforcing, and detailing you have to go through during installation.

Geo-Mat Waterproofing:
Mar-flex Geo-Mat rolls are made of high density polyethylene (HDPE) which offers strong resistance to hydrostatic pressure and provide excellent drainage. Mar-flex Geo-Mat rolls feature dimples that are aligned along vertical and horizontal axis to rapidly channel water from grade to the footer drainage system.


  1. Great info to follow up your earlier post.

  2. Great post, Jennifer! This will really help out future bloggers and those of us who wondered what the heck they put on our basements!

  3. Thanks everyone. I spend all my time researching the house lol.

  4. Nonleak Waterproofing is a famous Waterproofing service provides in Toronto. We provide excellent waterproofing products and services for you to spots for example retaining wall, roof, toilet, mineral water tank etc.