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callf

03:11PM | 09/03/03
Member Since: 07/10/02
6 lifetime posts
Bvbasement
We are having our roofing redone on our 30x40 ft house and garage.The previous owner remodeled the attic space by himself with kneewalls and insulated rafters,drywall and textured paint.
Trouble is, that owner stapled 10" batts in the 6" cavity. Now we can't get foam airchutes or even aluminum sheeting and wood stakes between the insulation and the roof deck
Elk says they won't keep their 30 year shingle warranty at all without proper ventilation. We are having the ShingleVent II ridge vent installed.
The contractor washed their hands of the problem after promising they would get it solved (which is why we chose them). Now they say they can rip out the ceiling and replace everything for another $2000-3000.
Have we just wasted our $10,000 roofing job? Is there another option here? What about just cutting the insulation out by entering the 2 crawl spaces, or something?

Piffin

02:07PM | 09/20/03
Member Since: 11/06/02
1281 lifetime posts
Doing anything may cause a definite problem to get rid of a potential problem.

The source of your trouble lies in the fact that there area couple of studies indicating that when htere is no way for heat in the roof to disperse on the back side, the average temp of the shingles is 2-3° higher. Hotter temps cause a faster off-gassing of volatile oils so shingles dry out or age faster. How much faster is still an open question. The studies that show the worst problem are where shingles are applied over a foam insulation and or radiant foil that redirects heat to the back side of the shingles. Not all manufacturers have indicated that they void warrantees due to unvented attics. In many places with cathedral ceilings or denspack cellulose insulation, venting is not called for.

The sum total of all this is, I wouldn't worry about it. You may not have a valid warrantee from Elk for all manner of failure but you have good shingles and probably a good system. removing the insulation is not a cost effective option, IMO unless there are other indications of problems with condensation or something else.

hoganem

07:37AM | 09/22/03
Member Since: 02/13/03
90 lifetime posts
Do you honestly know of anyone who has ever collected on a roof shingle warranty? I am no pro, but I haven't.

It's kinda like paint or coatings. My friend has a log cabin house. Sealed with Behr's coating. The beautiful red cedar color is turning black. Behr's says they'll replace the coating $1000. Big deal, it's going to cost $12,000 to blast off the old crap with walnuts shells. Do they really think he would put that crap back on his house again? I think not.

You are in same boat. So they replace the shingles, so what, they won't pay the roofer to tear em off and put the new ones back on. Don't too worked up about the warranty.

I am assuming the roofer is tearing off the roof deck and installing new? Sounds like the attic is accessible and if it is I would hire someone else or do it myself as far as the insulation. Otherwise bite the bullet and pay him.

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