Private Building, San Rafael, California:

The area has a very high water table, and keeping the substructure as light as possible was a must. The
Engineer substituted our Lightweight Drain Rock for this under the slab application. There was also an
additional benefit of superior wicking over conventional drain rock. In addition, Lightweight fill sand was used
in the place of nominal weight sand.
Latest News
:: San Rafael - United Market::
LWF sand placed and ready for
Partial placement of concrete
over LW Drain and LW sand.