Several years ago I installed a row of clear or translucent (can't
remember which -- now looks translucent) roof panels on a pole barn.
Recently I've noticed that where this panel passes over the wooden
joists and at the lapped edge the material has blackened and some
places apparently melted. I will avoid using this material in the
Might have been this stuff:
http://www.lowes.com/ Tuftex 96" Clear Corrugated Plastic Roof Panel
That was a stupid-ass thing to do.
No self-respecting farmer would use plastic corrugated panels on a pole
barn. Galvanized tin/steel is what they use.
Plastic panels are for home-owner backyard projects with a life
expectancy of about 5 years.
I've seen a lot of fiberglass used for farm roofs. Not always the entire roof
but often individual panels used as cheap skylights. It's also not uncommon
to see fiberglass used on the entire roof of smaller buildings.
Again we welcome a request for help with warmth and compassion.
If you read his post you might have understood he did what many pole-
barn builders do, and have done for years. Installed an occasional
strip of translucent or transparent material in the roof to allow
sunlight in for illumination.
I have used greenhouse grade correlated polycarbonate panels on other
applications with some pretty good success (I think it is called
Suntuf). The greenhouse poly isn't nearly as expensive as sheet
polycarbonate which would probably be cost prohibitive. I think I
paid on the order of $30 per 12' x 26"' sheet plus the screws and
rubber shapes to seal it to the frame work. The application I used it
for was some 4' x 6' basement window well covers for our home. They
are supposed to resist impact of 1" hail and they have been tested in
that respect (successfully).
I suspect you will have to replace them in time because as with any
similar product UV will get to them. Our covers have been in place
for about three years and the poly looks as good, and as clear, as it
did when new.
BTW Home Guy -- Are you a farmer???
We have no idea if that was the intended use of plastic panels - and the
OP says plastic - not fiberglass.
Now if the OP will man-up and come back here and post more details -
such as how large this barn is and if indeed he only has a few of these
panels for illumination vs covering the entire roof - then we can debate
I know several that are good friends / relatives and I'm familliar with
farm and agricultural practices.
Hot sun'll do it...
If you do try again use a piece of reflective tape underneath at the
joists/ends; I've not observed the problem at the edges. But, if it
were painted any color not quite light I can see it possibly happening;
w/ galvanized it's bright enough reflection is sufficient to prevent or
at least minimize problem.
The fiberglass panels while not clear will stand up to the heat "more
better" as somebody else noted.
I seem to have lost the link; somebody posted a u-tube link to a group
using one-liter clear bottles inserted in roofs as skylights. (The
application was in the tenement areas in Philippines and the like but
would work for barns, etc., just as well.) The amount and distribution
inside was remarkable. I've intended to try one in the old machine shed
here but haven't yet gotten one of the required round tuits... :)
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