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Old 02-14-2012, 10:44 PM   #31
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help! strange horizontal bubbles on new roof


there should be no insulation in your soffit

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Old 02-15-2012, 08:56 AM   #32
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Ok, wow, I didn't know that either! That gives me a lot more confidence that I can fix this myself withouth screwing up my attic insulation!


I did actually remove one of the soffit vents last night (to see how dirty and/or obstructed it was) and no insulation fell out. I thought it was just the baffles doing their job, but I realize now that the baffles are more there to ensure airflow over the top of any highly stacked insulation.

I guess it looks something like this in there:
http://www.brooksideroofing.ca/_borders/vents2.jpg (except I have the blown in stuff)
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Old 02-15-2012, 06:31 PM   #33
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Ok, so a rep from the home builder came out to take a look. He said that their guidelines have them place an under-eave vent every 8 foot and not over windows. Basically, it looks like that's exactly what they did (and also explains why I have so few intake vents since my house has lots of windows).

Is that ludicrous or is there some method to their madness? The rep was friendly and said he'd pass it up to someone else with more experience to come take a second look. He also checked to make sure the decking used clips (which it does). I was pretty surprised/pleased that they even came out considering that the house is now 6+ years old.

Given that they've built hundreds of homes in my neighborhood, and likely many with my exact floor plan (and therefore lack of vents per their guidelines), do y'all still think this is my issue? I guess I might still be the only guy with the two layers (15 + 30lb) felt...

In the meantime, I'm going to go ahead and pull off all the existing soffit vents to see if any are obstructed.

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Old 02-15-2012, 09:17 PM   #34
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help! strange horizontal bubbles on new roof


i believe the theory behind no vents over windows is in case there is a fire and the window is open or broken it won't get drawn up into the attic space

not sure if it's true or not but i heard it a long time ago
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Old 02-20-2012, 11:01 PM   #35
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help! strange horizontal bubbles on new roof


I've had this problem before, just not as bad. First thing is that there will need to be repairs done and shingles replaced regardless. There is a good chance that it is the felt. What happens is somehow moisture developes under the felt causing it to bubble in turn lifting the shingle. That's why it feels like an air bubble, because it is. You may notice that the pattern of the bubbles resembles the width of the felt paper. If this is the cause, shingles will need to be removed along the entire bubbled area, the felt paper cut and re-fastened, and new shingles installed. Installing felt over felt is very typical anywhere.
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Old 02-21-2012, 09:32 PM   #36
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My roofer is still waiting for a final opinion from Owens Corning, but the prevailing theory from them is that there was some sort of moisture imbalance caused by the fact that we had a really dry summer (drought) and then alot of rain, right after the roof went on (as well as the first rain for months, the morning the roof went on but before tearoff). Some people seem to believe this will correct itself over time. Would you say that's unlikely?

Meanwhile, I did go ahead and replace all my soffit vents this weekend. The old ones were definitely clogged up with dust, pollen, and other small fibers. The soffit cavity and baffles were clear though. I also definitely noticed that some of the openings were not cut as large as they should have been to take full advantage of the vents.

I don't think the lack of ventilation caused this problem on its own, but it surely didn't help... Hoping I can convince the builder to cut and baffle a few more for me, in case it expedites any drying out that needs to occur. In any case, if someone actually physically fixes the felt and shingles, I'd want to make sure my ventilation was able to minimize any recurrence.

Would I be crazy to crack my garage door a few inches and leave the attic door/stairs (in the garage) open to create a massive intake for a week or two?
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Old 02-21-2012, 10:07 PM   #37
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Originally Posted by dfwnewroof View Post
My roofer is still waiting for a final opinion from Owens Corning, but the prevailing theory from them is that there was some sort of moisture imbalance caused by the fact that we had a really dry summer (drought) and then alot of rain, right after the roof went on (as well as the first rain for months, the morning the roof went on but before tearoff). Some people seem to believe this will correct itself over time. Would you say that's unlikely?

Meanwhile, I did go ahead and replace all my soffit vents this weekend. The old ones were definitely clogged up with dust, pollen, and other small fibers. The soffit cavity and baffles were clear though. I also definitely noticed that some of the openings were not cut as large as they should have been to take full advantage of the vents.

I don't think the lack of ventilation caused this problem on its own, but it surely didn't help... Hoping I can convince the builder to cut and baffle a few more for me, in case it expedites any drying out that needs to occur. In any case, if someone actually physically fixes the felt and shingles, I'd want to make sure my ventilation was able to minimize any recurrence.

Would I be crazy to crack my garage door a few inches and leave the attic door/stairs (in the garage) open to create a massive intake for a week or two?
just skimmed through this thread, but did the roof decking or felt get wet at anytime during the reroof? That felt will bubble up when it gets wet.
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Old 02-22-2012, 09:32 AM   #38
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help! strange horizontal bubbles on new roof


There was a brief shower the morning that the roofer's got started (they started tearoff that afternoon). The rolls of felt were sitting my driveway at that time, so I assume they got a little wet on the exterior. Would a brief shower be enough to get wicked into most of the roll?
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Old 02-27-2012, 01:13 PM   #39
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Thanks to everyone who contributed to this thread. Here's where everything has landed:

Owens Corning's expert is saying that the ventilation system suffered from a "moisture imbalance" due to our record drought last summer followed by rain right around the time my new roof went on. He says he's seen this many times before in places like Arizona where they are prone to drought followed by extreme rain. He is confident that it will work itself out over time, particularly as the heat of summer drives the trapped moisture out of the system (primarily the felt). My roofer and I have agreed to see how it goes for several more months.

My homebuilder came out and agreed that they had shorted me at least two soffit intakes (they're using the 1/300 rule on a roof area of 2715 sq ft). They're going to come back out and add 3 new intakes, giving me a total of 13. I've already replaced my 6 yr old, dirty soffit vents with new ones (was amazing how dirty the screens had gotten) and they've agreed to also widen the openings on several of the cuts that aren't taking full advantage of the vent area. I'm hoping that all of this will get my intake even or greater than my 5 turtle exhaust vents and further accelerate the "predicted" disappearance of my roof bubbles.

I'll do my best to let everyone know if the problem actually goes away on its own or ultimately requires manual intervention.
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Old 02-27-2012, 01:27 PM   #40
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Please have everyone put it in writing.
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Old 02-27-2012, 04:20 PM   #41
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Please have everyone put it in writing.
+1

Won't find any better advice than that. If the issue is as they say, it should resolve itself simply then.
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Old 02-29-2012, 10:38 AM   #42
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Wet felt. roofer should have slit puckers. they will probably never go away. 15lb or 30lb felt is a thing of the past anyway. there are many new roof underlayement products out there now. Been roofing in Maine for over 30yrs and this roof would certainly leak if it were here in Maine. shingle slots are not staggered right and dip on eaves would leak in a icedam situation. basically roof was not prepped right before shingling. also make sure you have soffit vents so your higher vents will work. you now have what we call a HOT roof because all that roof paper and poor venting. try removing the shingles at every pucker, slit paper and reinstall shingles. In ten years . Install new roof with propper underlayement and architectual laminated shingle that will last 35 to 45 yrs.
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Old 02-29-2012, 12:26 PM   #43
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Wet felt. roofer should have slit puckers. they will probably never go away. 15lb or 30lb felt is a thing of the past anyway. there are many new roof underlayement products out there now. Been roofing in Maine for over 30yrs and this roof would certainly leak if it were here in Maine. shingle slots are not staggered right and dip on eaves would leak in a icedam situation. basically roof was not prepped right before shingling. also make sure you have soffit vents so your higher vents will work. you now have what we call a HOT roof because all that roof paper and poor venting. try removing the shingles at every pucker, slit paper and reinstall shingles. In ten years . Install new roof with propper underlayement and architectual laminated shingle that will last 35 to 45 yrs.
For a fellow veteran of the trade, you sure have a lot of faith in new products that have not proven themselves yet.....
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Old 02-29-2012, 01:25 PM   #44
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For a fellow veteran of the trade, you sure have a lot of faith in new products that have not proven themselves yet.....
I've been using Grace H2O sheild since 1980, and Rooftopguard11 for half that long, best things they ever invented for roofers, check out there websites and see stats and other roofer testimonials, felt can 't even come close. I think these products have certainly proven themselves.And installing 3 tab shingles instead of laminated archectuals at the same price to buy and install doesn't even make sense, when you can gain almost 15yrs of life.
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Old 02-29-2012, 02:50 PM   #45
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I've been using Grace H2O sheild since 1980, and Rooftopguard11 for half that long, best things they ever invented for roofers, check out there websites and see stats and other roofer testimonials, felt can 't even come close. I think these products have certainly proven themselves.And installing 3 tab shingles instead of laminated archectuals at the same price to buy and install doesn't even make sense, when you can gain almost 15yrs of life.
I agree, but it's still speculation. It will depend on your location also. Not many roofs last that long up here.

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