I have a friend with a farm who wants to replace a roof on an outbuilding. I joking told him he could replace his roof with street spam instead of shingles and it would only cost him some nails. He is so cheap he really wants to do this. Anybody have an idea how long this stuff will last in the elements?

Thanks, Jaws

Really all depends on what type of elements he'll have to deal with.
There are (were)some signs that were high up on some utility poles in the DFW area of TX that had been there for a very long time.

We began removing those signs after getting the ones with a higher priority. We found that those signs were extremely brittle due to the exposure to extreme summer heat and winter's colder temps.

Personally I wouldn't recommend such. A quality shingle in our area will last at least 25 years. The coroplast might last five to seven years. If he wants to go to the trouble of re-shingling the building that often then go for it.

GW

If its worth doing, its worth doing right!

How in the world would you explain "this one" to the Building Inspector?

Making a positive difference!

The sun will age the plastic and it will crack and leak very quickly. It's also not permitted under the codes.

LOL, I don't think he cares to much about the building inspector or code violations. This building is falling apart so bad that the street spam just may improve the integrity of the stucture.

Thanks for feedback.

It is alos intensely flammable.

Sounds like a bad idea if he is looking for a permanent solution.

I had a hole in the roof of my house where an attic fan had broken away, and I got up there and covered the hole with a coroplast sign. It worked perfectly, inserted underneath the existing shingles, nice and waterproof, and lasted the 3 months until I got the whole roof re-shingled.

But I wouldn't trust it more than 6 months or so because older ones start getting brittle.