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Posted by Aaron Fude on June 5, 2008, 1:12 am
Hi,
What's the point of caulking the roof flashing for the exaust fan
vent?
Specifically, I'm talking about what takes place at 2:20 in the
following video:
http://youtube.com/watch?v=IrwWOW9RE3Q
It seems to be protection against the water flowing up. Is this done
to protect agaist the moisture drawn up by capilary forces? And in
that case, are the shingles themselves caulked?
Thanks!
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Posted by on June 5, 2008, 1:45 am
On Wed, 4 Jun 2008 22:12:40 -0700 (PDT), Aaron Fude
>Hi,
>
>What's the point of caulking the roof flashing for the exaust fan
>vent?
>
>Specifically, I'm talking about what takes place at 2:20 in the
>following video:
>
>http://youtube.com/watch?v=IrwWOW9RE3Q
>
>It seems to be protection against the water flowing up. Is this done
>to protect agaist the moisture drawn up by capilary forces? And in
>that case, are the shingles themselves caulked?
>
>Thanks!
Wind driven water?
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Posted by Ivan Vegvary on June 5, 2008, 2:22 am
> Hi,
>
> What's the point of caulking the roof flashing for the exaust fan
> vent?
>
> Specifically, I'm talking about what takes place at 2:20 in the
> following video:
>
> http://youtube.com/watch?v=IrwWOW9RE3Q
>
> It seems to be protection against the water flowing up. Is this done
> to protect agaist the moisture drawn up by capilary forces? And in
> that case, are the shingles themselves caulked?
>
> Thanks!
If you have debris build up uphill of the roof vent (e.g. leaves, twigs,
snow) it will form a dam and water will accumulate and rise above it.
Ivan Vegvary
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Posted by willshak on June 5, 2008, 7:14 am
on 6/5/2008 1:12 AM Aaron Fude said the following:
> Hi,
>
> What's the point of caulking the roof flashing for the exaust fan
> vent?
>
> Specifically, I'm talking about what takes place at 2:20 in the
> following video:
>
> http://youtube.com/watch?v=IrwWOW9RE3Q
>
> It seems to be protection against the water flowing up. Is this done
> to protect agaist the moisture drawn up by capilary forces? And in
> that case, are the shingles themselves caulked?
>
> Thanks!
>
Because you do as much as aesthetically possible to prevent water from
entering the house when installing anything that goes through the roof,
so you don't have to do it later, before fixing the water damage inside.
--
Bill
In Hamptonburgh, NY
To email, remove the double zeroes after @
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Posted by Red Green on June 5, 2008, 9:27 pm
65b76fef6e69@e53g2000hsa.googlegroups.com:
> Hi,
>
> What's the point of caulking the roof flashing for the exaust fan
> vent?
>
> Specifically, I'm talking about what takes place at 2:20 in the
> following video:
>
> http://youtube.com/watch?v=IrwWOW9RE3Q
>
> It seems to be protection against the water flowing up. Is this done
> to protect agaist the moisture drawn up by capilary forces? And in
> that case, are the shingles themselves caulked?
>
> Thanks!
You've seen other replies with good reasons. Another is ice. Ice builds up
in places then backs UP the roof and UNDER shingles when it can.
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