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Roofing: Do Nail Pops Require Tear Off?

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Roofing: Do Nail Pops Require Tear Off? DerbyDad03 08-12-2008
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Posted by DerbyDad03 on August 12, 2008, 10:43 am


I have a basic side gable roof, consisting of a single layer of ~20
year old standard three-tab asphalt shingles over 3/4" T&G sheathing.

There are a number of nail pops that have lifted some tabs and some
that have actually punched through. There are a couple of spots where
the sheathing has gotten wet which I have dealt with by banging the
nails down and smearing roofing tar on the holes while I get some
estimates.

One contractor told me that while he is surprised that I have nail
pops in T&G sheathing, he is confident that he can pound the nails
back down and add a layer of architectural shingles, avoiding a tear
off.

My obvious concern is the possibility of *future* nail pops in other
locations. Even if he pounds the existing pops down, what is going to
prevent other nails from popping later? He also mentioned that nail
pops are not as big an issue with architectural singles due to their
thickness.

He is going to give me an estimate for both a tear off and a non-tear
off installation and leave the choice to me.

I=92m interested in what others think about adding a second layer as
opposed to a complete tear off.

I=92m also interested in what would occur if I opted for a complete tear
off. Would *all* of the old nails be removed or would they just be
pounded down anyway?

Thanks!

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Posted by Edwin Pawlowski on August 12, 2008, 10:53 am




My obvious concern is the possibility of *future* nail pops in other
locations. Even if he pounds the existing pops down, what is going to
prevent other nails from popping later? He also mentioned that nail
pops are not as big an issue with architectural singles due to their
thickness.


**********************************************

That would be my concern also. I'd to a tear off.



Posted by DerbyDad03 on August 12, 2008, 10:58 am


>
> My obvious concern is the possibility of *future* nail pops in other
> locations. Even if he pounds the existing pops down, what is going to
> prevent other nails from popping later? He also mentioned that nail
> pops are not as big an issue with architectural singles due to their
> thickness.
>
> **********************************************
>
> That would be my concern also. =A0I'd to a tear off.

That implies that a tearoff includes the removal of *all* old nails,
right?

Posted by Smitty Two on August 12, 2008, 12:27 pm



>
> My obvious concern is the possibility of *future* nail pops in other
> locations. Even if he pounds the existing pops down, what is going to
> prevent other nails from popping later? He also mentioned that nail
> pops are not as big an issue with architectural singles due to their
> thickness.
>
>
> **********************************************
>
> That would be my concern also. I'd to a tear off.

I'd not only do a tear off, but replace the sheathing that's gotten wet.
The roofers put about 20 new sheets on my roof a few months back. I
spent more than I wanted to but have total peace of mind now.

Posted by aemeijers on August 12, 2008, 5:26 pm


Smitty Two wrote:
>
>>
>> My obvious concern is the possibility of *future* nail pops in other
>> locations. Even if he pounds the existing pops down, what is going to
>> prevent other nails from popping later? He also mentioned that nail
>> pops are not as big an issue with architectural singles due to their
>> thickness.
>>
>>
>> **********************************************
>>
>> That would be my concern also. I'd to a tear off.
>
> I'd not only do a tear off, but replace the sheathing that's gotten wet.
> The roofers put about 20 new sheets on my roof a few months back. I
> spent more than I wanted to but have total peace of mind now.
I think OP said the sheathing was 3/4 t&g, not plywood or OSB. So 'wet'
really isn't an issue, unless it stayed wet a long time. Like the others
said, do it right, do a tearoff. And while deck is bare, walk around
with a big iron rod, and bounce it on all the usual suspect areas (like
around chimney, vents, ridge line, and any place the wood looks
different.) You will be able to tell the mushy spots by how the rod
bounces, and the sound. Any place that sounds different, poke with an
ice pick, and replace all the soft areas. The extra few hundred for a
complete tearoff is cheap insurance, IMHO, and makes the new roof look
better and last longer.
--
aem sends....

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