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Country Discussion Topics
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Roofing material
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gary    Posted 07-04-2002 at 09:53:32       [Reply]  [Send Email]
Has anyone had any experience with the spray foam type roofing?about half my roof has a pretty steep pitch,probably not good for the sprayed on foam??????? Right now am trying to decide what to use. The shingles have suffered badly due to winds and hail in the past. Any suggestions?

DIZ    Posted 07-08-2002 at 19:02:08       [Reply]  [No Email]
In the biz that I am in I see alot of roofs. I am familiar with a sprayed foam that acts as an exterior insulation and helps to absorb hail hits and the like ...but it must be covered with a membrane to protect it from ultraviolet rays.

If you have a roof this is steep (anything over 6-12 slope is considered steep)...then what I would do is nail toe boards on so that is is comfortable to stand on the roof, and lay a standing seam roof over the old one. I would give that about 50 years life. (standing seam is a metal roof)

When I say nail, I mean use screws that have the grommet on them, it is easier, no bouncing and banging and goes really fast, just have a couple of good batteries for the gun.....put one on a few years back using a 9.6 volt Maikita and it held out real good, I have upgraded to a 14.4 Porter Cable, but the point is if you don't have a drill, the 9.6's are real cheap now a days.

There are some pretty easy ways to measure a roof without ever getting on it, too. The easiest is to take a length of cotton clothes line and spray paint every measurement...say 5 feet orange 1 feet blue and tie a tennis ball on...hole through the ball. and pitch it over the top...then just stand back and count your lines....or if you have a standard 3 tab shingle..each course is generally 5 inch reveal. count them up. 5/12 = 4.662 or something there about and divide the #..

so 28 courses will equal 14 feet..I don't have my calculator here so don't count on these numbers.

If you donlt know what the "reveal" is, climb the ladder to the first course and measure at the edge.

If you have the interlocking shingles very common on barns, this method won't work and you back to the tennis ball and line.

Good luck.

DeadCarp    Posted 07-04-2002 at 18:58:52       [Reply]  [No Email]
I've seen spray foam shot UNDER metal roofing to avoid drips, matter of fact i've seen whole igloos shot with foam and covered in fiberglas but not familiar with exposing any kinda foam to weather. Everything i've seen absorbs water .... eventually.

Mark Hendershot    Posted 07-04-2002 at 13:41:55       [Reply]  [No Email]
All my roofs are Metal! They work great for snow, rain and Fire reasons. No maint or wind problems either. Mark H.

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