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Old 12-29-2012, 07:30 PM   #1
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ice and water shield


Is it worth the investment to install ice and water shield product with the so call good insulation and ventillation on new home and can it be install in the winter sub-zero temp. Thanks

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Old 12-29-2012, 07:40 PM   #2
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Storm and Ice Shield helps prevent Ice dams from doing damage to the home.
Without proper venting and insulation your going to have ice dams, and shorten the life of the shingles.

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Old 12-29-2012, 07:44 PM   #3
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It isn't worth anything to me unless the installing contractor will guarantee a 100 percent seal for the life of the product. With one small area failing to seal it becomes no better than 30 lb. felt.
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Old 12-29-2012, 08:07 PM   #4
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Storm and Ice Shield helps prevent Ice dams from doing damage to the home.
Without proper venting and insulation your going to have ice dams, and shorten the life of the shingles.
A lot of new homes built these days with 2 climate zones have the air handler for the upper floor located in the attic, so even with good ventilation, the attic will get warm when the furnace is turned on.
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Old 12-29-2012, 08:33 PM   #5
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I would think there is almost no way to get ice and water shield to stick to a cold surface in winter temps. In fact, any type of roofing work is hazardous in the winter time. Why risk an improper install? Wait til Spring.
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Old 12-29-2012, 08:36 PM   #6
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I think that its always good to install ice dams material at the eaves, the rakes, the valleys, and sometimes the ridge, as it seals against wind blown rain if installed correctly. If you go back in the roofing posts I describe what ice dams is and how it occurs. Educate yourself. It can be installed in low temperature but you want to keep it warm prior to installation. There are reasons to not install your roof in really cold weather though. Including cracking and rupturing of the fiberglass mat.
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Old 12-29-2012, 11:28 PM   #7
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Has anyone installed ice and water shield that covers all their wood sheathing instead of felt?
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Old 12-30-2012, 12:08 AM   #8
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Has anyone installed ice and water shield that covers all their wood sheathing instead of felt?
Yes,,,,and I probably will not answer the phone if I know they are wanting a new roof.

And that is because the entire house will need to be redecked and the estimate for that will be astronomical.
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Old 12-30-2012, 01:06 AM   #9
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A roof is usually done first 6 feet in ice and water. Also in dams then upgrade to a synthetic underlayment for the rest of roof. I like Titanium udl 30. You should have proper intake at sofits and proper exhaust on roof. This will extend the life of the roof. I wouldn't recommend winter roofing. You want a good sun to hit the roof to seal those shingles down.. Concerning insulation. Spray foam is best on walls. Roof sheathing i like 1/2 inch cdx plywood.
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Old 12-30-2012, 01:47 AM   #10
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Has anyone installed ice and water shield that covers all their wood sheathing instead of felt?
not for the entire decking but for say the first couple squares at the drip edge when we got the new roof done. i have a huge thread in here about this
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Old 12-30-2012, 09:39 AM   #11
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Yes,,,,and I probably will not answer the phone if I know they are wanting a new roof.

And that is because the entire house will need to be redecked and the estimate for that will be astronomical.
After a roof has ice & water shield installed on all of the sheathing, why would the homeowner ever need a new roof? Maybe just new shingles. Thus, no new decking would ever be required.
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Old 12-30-2012, 10:46 AM   #12
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After a roof has ice & water shield installed on all of the sheathing, why would the homeowner ever need a new roof? Maybe just new shingles. Thus, no new decking would ever be required.
The shingles normally fuse to the I/W and the I/W to the decking.

Makes removal about impossible.

Removal is easier, faster, and probably more cost effective when it comes to pulling the whole roof deck up sheet by sheet.
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Old 12-30-2012, 11:44 AM   #13
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Has anyone installed ice and water shield that covers all their wood sheathing instead of felt?
Yes and we do not even get freezing temps here. A lot of it is custom homes and or PW jobs that have it spec'd.
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Old 12-30-2012, 12:03 PM   #14
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You can install I&W in cold temps within reason (below 0 Fahrenheit is too cold to be doing any roof work though). It will bond to the roof once it gets some direct sunlight on it. For a north-facing slope, that won't be until spring though. Same thing with the shingles, they need heat to bond, and as was already mentioned they are much more fragile in cold temps so they could get damaged walking around on them. So if you get some strong winds before they bond, you could end up with some damage.

So given the choice, it would be wiser to wait until warmer temps.

I installed this roof with I&W shield back in the 80s during December in Wisconsin and recently did a tear-off. This was south-facing, but I also had a north-facing roof on the front of my house that I did at the same time. Temps were probably in the 20s and 30s F , I consider that moderate winter temps.

If you're hiring a contractor, you also need to consider the realities that a person working outside in extreme temps may not give you the same level of quality he would in more reasonable temps.
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Old 12-30-2012, 09:20 PM   #15
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After a roof has ice & water shield installed on all of the sheathing, why would the homeowner ever need a new roof? Maybe just new shingles. Thus, no new decking would ever be required.
Damaging hail.I roofed an apartment complex in STL that had 3 courses of Ice and Water and along the rakes.We replaced over 1000 sheets of plywood all containing the Ice and water and the top of the shingles because the tabs would pull.

There is a way that I have seen hacks get by without pulling the plywood covered with Ice and Water,,,they cal, it "Cut-tabbing" they cut the tabs and felt and roof it.

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