SPRAY FOAM MAGAZINE • MARCH/APRIL 2015 47
to comply with local building code
requirements and simultaneously
save time. To mitigate SPF overspray
damage, the crew covered the floor,
windows, and sprinkler heads with
plastic sheathing. The crew wore PPE
consisting of Tyvek suits, boots, gloves,
and supplied-air respirators.
With the scaffolding in place and 300
feet of hose connecting their spray rig
to the spray area, the Purefoam crew
was ready for the foam application.
Using a Graco H- 30 proportioner, the
crew applied the foam to the underside
of the roof using a Graco Fusion air-purge gun. The three inches of foam
that were applied provided an R- 21
value. Throughout the application, the
crew used InsulStar, a 2 lb. closed-cell spray polyurethane foam product
formulated by NCFI.
“Closed-cell spray foam was the obvious
choice for this project,” said Adler.
“Structural rigidity was necessary and
the foam itself is non-porous, providing
an air and vapor barrier, so that there’s
no danger of history repeating itself.”
View of the
space room and
the 22-foot peak
of the underside
of the roof
(cont’d on the next page)
After the spray foam application, the crew
utilized a Graco GH 833 hydraulic gas
sprayer to apply to the underside of the roof
40 wet mils of DC-315, a thermal barrier
protective coating formulated by IF TI.