There are several different forms of foundation waterproofing on the market.  The most common is polymer-modified asphalt.  This is a liquid asphalt coating that has rubber polymers added.  The rubber polymers enhance the asphalt to allow it to stretch over shrinkage cracks.  Now water cannot penetrate into the basement even if the foundation cracks.  Polymer-modified asphalt waterproofing membranes dry to form a seamless, smooth and continuous barrier to water.

Polymer-modified asphalt waterproofing has several advantages going for it.  In addition to being highly effective, the cost of installation is very low compared to other waterproofing products.  This is because since they are liquid, they can be sprayed onto a foundation wall at a high rate of coverage.  One man hour of application will result in many more square feet of a foundation being treated compared to other types of waterproofing.

The cost of materials is also usually lower for liquid foundation waterproofing membranes.  In fact the cost per square foot of installation can be 1/3 to ½ the cost of other waterproofing products