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At
that time we used conventional materials
such as plastic cement, fiberglass, fibered
asbestos asphalt coatings, and cold process
materials to repair, patch, and coat existing
roofs. New roofs were almost exclusively
applied with hot asphalt and plies of roofing
felts. These conventional products were
extremely susceptible to failure due to
hot and cold contraction and expansion increased
by extreme freezing and thawing cycles.
In the mid-seventies, we discovered urethane
spray foam and elastomeric coatings.
Eventually, we
came across some corrugated metal roofs
that had foam and coating applied over five
years previously. The roofs had not leaked
a drop since the day they were completed.
We were immediately sold on the product.
Two years of leak free service on these
types of metal roofs with conventional materials
was exceptional, and over five years was
unheard of.
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