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re: materials for site built thermal collector
4 jun 1997
kevin anderson wrote:
>i am looking for sources of materials to be used to build a thermal solar
>collector on site? i am an hvac person looking to replace a shingled roof
>and go to solar collector and trying to keep costs down i.e. daughter in
>college. roof is already pitched for solar. what is out there? thanks.
you might try replacing the roof with a single layer of clear flat or
corrugated 0.020" replex (800) 726-5151 or dynaglas (408) 997-6100
polycarbonate plastic, which is used for commercial greenhouse roofs.
my 600 ft^2 steep south dynaglas roof is 2 years old, having been through
golf-ball sized hail, etc. it was made from standard 51" wide x 12' long
pieces overlapped by 2 lengthwise corrugations. a neighbor in the roofing
business admired the labor requirement while watching the carpenter screw on
the large sheets with no sheathing or felt. it costs about $1/ft^2 and has a
10-year light transmission guarantee, with a 20-year expected mechanical life.
the north gable roof of my attic has no insulation yet, unlike the floor.
it's a nice bright space during the day, which gets up to about 120 f in
winter sun, and an interesting place to watch thunderstorms at night.
nick
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