It's hard to imagine forming a foundation
with rigid foam blocks, which
when filled with concrete provide a
structurally sound R-20 wall.
As a builder I have been intrigued
with this type of product, particularly
due to the high cost of conventional
foundation forming where I live in Bar
Harbor, Maine. Because Bar Harbor is
a granite-bound island, you have few
opportunities to dig a standard foundation
hole, pour a footing, and start
forming up walls. Foundation formwork
is costly here even on easy sites.
Stone Site
I had a chance to try out foam forms
in November 1988 when my wife and
I started building our own home. The
site consisted of a thin layer of "blueberry
sod"