View Full Version : Need some cool cats to help us with our Hot Tin Roof

07-16-2009, 11:29 PM
We have a tin roof that gets really hot in the summer and makes it a pain to work inside during the off season. Any suggestions on how to best cool it down? Water drips are too pricey because the city charges too much for water (and sewer) charges. I heard there was something that could be painted on the tin that helped cool it off. Does this stuff really work, and is it affordable? (We have nearly 12,000 square feet of roof to cover.) Insulation is too pricey to install. Exhaust fans are an option, but they want $2K to install ten of those, plus the power charge makes those expensive. A passive system would seem the best choice if it is cost efficient and works well.

Anyone know if that special paint works and what it is called?

jim wilson
07-16-2009, 11:40 PM
heat block radiant barrier paint blocks 96 percent of heat transfer

07-17-2009, 11:05 PM
Try Snow Roof

I used it on a number of travel trailers, helped cool then down a lot
and stopped rain leaks too.

# Protects against damaging effects of the sun, wind, snow, rain and ice
# Reflects 90% of the sun's rays
# Dramatically lowers roof and interior temperatures, reducing energy costs

Old Tree Studios
07-18-2009, 10:11 AM
We've used a product on metal roofs called "Kool Seal (http://www.koolseal.com)". The stuff works great. http://www.koolseal.com

Kelly Anderson
07-22-2009, 05:29 PM
Have any roof vents been added? May not have to be powered but something will surely help. Also, is this building tipically closed up on either end, or are there big windows or door that can be opened. If not, you should really put soffit vents in as well. Just putting the roof vents in may help a bit, but if you cant exchange the air, you'll never really get the hot air to flow out the vents. By adding the soffit vents you allow some type of air to flow from the lower edge of the roof to the peak and hopefully out the roofvents.

Hope this helps,

Kelly Anderson

Allen H
07-22-2009, 08:32 PM
a spray on radiant heat barrier (as recommended earlier) is a good way to go. Alot of the TX metal buildings have two roofs, one about 8 inches above the other, that way the real roof is always in the shade. A simple reflective coating could help quite a bit they often paint it onto the roof of trailers to keep them cooler.
good luck,
Allen H

07-22-2009, 11:41 PM
Thanks guys. All these ideas could be a big help. There are a dozen wind turbine vents, which only seem to help when the wind blows them enough to get them spinning, but on the hot muggy Florida days, it just sits and bakes! Fortunately, things cool off a lot in October, but it would be nice to be able to work more in the day during the summer as well.