Today I'd like to discuss a little "foam 101" info that addresses some commonly asked questions I get from slab lifting customers:

The most common slab lifting foams we sell are AP Lift 430, AP Lift 440, and AP Lift 475. Each foam has a different density and load-bearing capacity. They also have different expansion properties. The higher the density of foam, the lower the amount of expansion (yield). All of the properties on the datasheets are based on lab conditions and free rise foam compression and density testing.  Free rise means foam that is allowed to expand in an unconfined state. When foam expands in a confined space, the densities and strengths increase rapidly.

Expansion = 24x

Yield = 3.2 cubic ft / gallon

Density = 3 lb per cubic ft

Bearing capacity = 7000 psf

Applications: Void fill, Residential Slabs, Light Commercial, some DOT

 

Applications: Industrial, Airport, Rail, DOT, Sinkhole Remediation, Infrastructure Sealing