BAck from home show...do you agree with this?

Louis The
3/26/2010
So the hunt for a roofer has begun. I have a hot roof, with Cedar Shake, and tongue and groove ceiling inside. Attic only over garage. Last inspector said 3 years left on roof. Getting ice damming too (roof is 30+ years old with some sort of “foam” insulation used). Here are a few things some of the prospective roofers told me. I am interested in your thoughts, agree or disagree? The Metal roofing that looks like Cedar shake comes in smaller units so is more costly, and more prone to leaking than the standing seam metal roofing… That the “interlock” single (aluminum) is more wind resistant and just as good as other metal roofing… That the Legacy Shingle is Fire resistant (rated A class – not sure how that compares to Metal – there is some risk of wildfires here). The legacy shingle is rated to 50 years and about as good as metal….added benefit is no shedding of snow (I have decking with rails on one side of the house, could be dangerous). That for metal installation use hidden mounting system…less maintenance required, less likely to leak.. More specifically to my situation, that they could just get down to the decking and put thick layers of insulation on top (not worrying about sealing the tongue and groove) with the same benefit… recommend converting the hot roof to a cold roof with an 1 ½ air gap and vents (apparently the specs of code up here in Alaska)… What do think about this input?
Guest User
3/27/2010
always ventilate when you can, warm roofs have more problems like ice damming and condensation and gutters coming off where metal is involved, it might cost more but standing seam 24 gauge kynar coated is a premium product, especially if you use a clip system, over a nail strip panel
Eric Novotny
An informed customer is the Best Customer!
3/27/2010
Anyone that says asphalt is as good as metal is automatically disqualified. Combustibility, durability, energy efficiency, and all other tangible measurements of performance go to the metal option. 50 year shingles are a joke. They have no basis to say they will last 50 years, they are a crude oil product, and what good does a 50 year shingle do me if the shingle granules and top coat break down in 20 years. Panel systems, by theory, will have more linear footage of seams and will therefore have more leak potential. If they are installed properly, there is no additional danger of leaks. Stone coated steel roof will hold snow loads because of the stone granules as opposed to a standing seam roof. Over deck venting likely be the move expensive option if the put the roof on a system of battens or purlins with insulating foam. There are more consumables in a system like that with the extra wood. All the T&G needs to be air sealed prior to any roof to stop the moisture and air losses.
Guest User
3/30/2010
Once again I appreciate your input. I was skeptical of the 50 year shingle thing, thanks for confirming my suspicions. By panel system are you talking about the “interlock” system that was described to me, or the Metal roofing that looks like Cedar shake (but I think comes in smaller panels)? My T&G can be sealed with an underlayer like Ice/Water shield, correct? (opposed to using the spray foam). What brand or brands have the Stone Coating?
Eric Novotny
An informed customer is the Best Customer!
3/30/2010
Yes on the interlocking system and sealing the T&G with ice water. I would still like to see some foam on the roof to prevent energy migration through it as well but you can used a rigid foam there if you like. Several brands have the stone coating granules on them. I personally use Decra but there are several other brands that are also well regarded.
Guest User
4/5/2010
I have two roofing compaines lined up to come out and evaluate this job. Still waitng to hear back from Decra on who they recommend for this area. I'm trying to clarify what I think is the best way to do this job is to contrast with their recomendations. I know this T&G needs to be sealed. Aside from ripping of the entire roof is there anyway to achomplish this? (like essentially build a new roof over the decking of the last one (leaving the original foam under the decking) with the Ice/water covered with foam, then an air space and then the roof). I think it is agreed that the hot roof needs to be converted to a cold one in some manner. Regarding sealing it the Ice/water would need to be over the entire roof area, not just the eaves and valleys like normally used, correct?
Eric Novotny
An informed customer is the Best Customer!
4/6/2010
Putting down I/W on the entire roof would effectively air seal the T&G.
Guest User
4/6/2010
but only if everything was totally ripped off and it was applied directly to the outer part of the T&G boards, correct? Not acceptable to lay it on on the decking (presumably that is above a 2" foam insulation board over the T&G), apply more insulation, then air gap, the roofing material?
Eric Novotny
An informed customer is the Best Customer!
4/7/2010
Best way to do it would be cover the T&G directly.
Todd Miller
Isaiah Industries, Inc.
4/11/2010
You have a beautiful place. I would very much suggest insulation and a vented cold roof. There are several steel shake products that would look beautiful and perform well. Check into Metro, Gerard, ATAS, and Kassel & Irons.
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