Thanks. I do not see anything real bad resulting from this.
Todd Miller
2012-04-26 05:39:56.000000
Ideally you would know the net free air flow numbers both for the ridge vent and the soffits and make sure there is good balance between intake and exhaust vents.
If you feel air movement in the attic, though, that is a good sign. And 105 is reasonable if it was very hot and sunny outside.
Todd Miller
2012-06-03 06:53:05.000000
A few weeks ago we had a Futureroof slate look metal roof installed. So far, so good. The crew appeared to do a great job and we are getting tons of compliments. I insisted that the old asphalt shingles be removed and it turned out that they had NEVER sealed so removal was easy. The felt paper was in perfect condition. I also insisted that ice and water shield be installed at the eves and valleys even though they said it was not necessary. This was applied and the whole deal was covered with Robetex 300 and finally the steel shingles. I was not home for part of the process and now I am wondering if they removed the felt paper at the eves before applying the ice and water shield or if they went over it. I sent an email to the installer, but have not heard back. I understand that the I&W would adhere to what is under it and I understand that the manufacturer's instructions are to apply to a clean deck. The nailing of the Robetex and shingles obviously would go through everything. The question then would be, do you see any dread consequences if in fact they did not remove the felt paper before applying the I&W. Thanks in advance!
Russell Namie
2012-04-25 22:21:29.000000
Thanks! They said that the I&W were unnecessary as the smooth metal surface would shed snow much faster than asphalt shingles, but I went for the " overkill " since years ago we had a leak with the ( now removed ) asphalt!
RgN
Russell Namie
2012-04-26 09:32:10.000000
Thanks again for responding. Is there a simple way to " test " how well the soffit and ridge vent system is working? The foam insulation guys placed baffles in the attic above the soffit vent openings and I am pretty sure that the outsides of the vents are clean and open. I can actually feel a breeze when I stand in the attic. We removed a power fan since most sources indicated that they are counterproductive in that they can short-circuit the soffit and ridge system. I checked the attic temperature one day last week when the outside temperature was near 90 with high humidity. The attic was around 105 + -. I have no temperature records from last year when we had the asphalt shingles as I didn't plan that far ahead to get a metal roof. I was told that the green Robetex 300 underlayment is breathable and therefore contributes to the roof being cooler.
I have noticed that a scrap piece of metal shingle placed in the sun does heat up but seems to quickly give up that heat when out of direct sunlight.
Russ
Russell Namie
2012-06-02 21:19:08.000000
Russell Namie,
Roof looks great and I think you did a great job researching and getting the final product that you wanted.
In terms of the I&W shield, it does need to be applied directly to the deck of the home and not to the felt. That being said, a properly installed metal roof will be about 100X less likely to leak as a result of and ice damn than asphalt shingles.
If you look at some of the older home stock in areas up North where they get a bunch of snow, you will see that most have what is referred to as an "Ice belt".
See here: http://www.melanson.com/images/gallery/residential/residential_L/Shingles-with-Copper-Ice-Belt_L.jpg
That all being said, ice damning is a heat loss issue and not a roofing issue. I&W shield is just a band-aid fix to an improperly insulated and air sealed home. Couple that with a roof whose ventilation is not up to par, you are going to have issues.
Now that you have finished the roof, get some insulation and air sealing done up there and feel free to email me and I am happy to talk you through what those items are and how to go about it.
Eric
Eric Novotny
2012-04-26 11:41:33.000000
Air movement is a definite plus and an attic temps of 105 is on the low scale.
Attic ventilation should ideally be balance with about 60% intake area/volume vs. 40% exhaust area/volume.
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