Gas Collector and Riser

The gas collector can be a single length of flexible and perforated pipe. It could also be connected to a flat drain mat, or to a board raised off the floor with bricks. Seal well around riser.

Preparing Foundation Walls for Attachment

If foundation walls are poured or are constructed of block, the caulk can be applied directly to the surface. Wire brush off loose dirt, slight dampness is not a concern.

Copyright 2000, Great Lakes Center for Occupational & Environmental Safety & Health, School of Public Health, University of Illinois at Chicago