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Subject Author Date
Need a 4" opening in my roof Aaron Fude 05-27-2008
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Posted by HeyBub on May 28, 2008, 5:04 pm
Chris Hill wrote:
> wrote:
>
>> Aaron Fude wrote:
>>> Hi,
>>>
>>> I am installing a exhaust fan in a bathroom and the only way out for
>>> the vent is through the roof. Can you point me to a resource that
>>> describes how to do that? I assume it's more complicated than
>>> putting some caulk around the edge... My roof is asphalt shingles.
>>>
>>
>> Really?
>>
>> When I had my roof re-done a few years ago the roofers took out the
>> dryer vent (which went straight up from the center of the house),
>> decked over the spot and put down shingles. I didn't realize the
>> dryer was venting into the attic until some time later.
>>
>> Anyway, I was faced with the same conundrum as you and was reluctant
>> to put another hole in the roof.
>>
>> I opted for about 30' of 6" PVC to run the vent to the closest
>> soffit.
>>
>> Here's a trick: Go UP into the attic about two or three feet, then a
>> continuous slope downward to the soffit. That way, most of the fumes
>> that condense will drain downhill.
>
>
> If, that is, you can even get their. I must have one of the few
> houses in the world that doesn't have four inches of clearance between
> the top of the wall and the roof deck. The hole in the roof isn't a
> big deal; this is roofing, not rocket science.

Ah, okay. You can't go up and over. Could you maybe go down and exhaust the
dryer into the sewer system? There's got to be a drain for the washer.

It's a JOKE, son.



Electric Radiant Heat 468x60
Posted by Michael B on May 28, 2008, 9:04 pm
When I installed a composting toilet many years ago, part of the
instructions included insulating the 4" PVC pipe. To help prevent
condensate return, since the pipe went straight up and out.

>
> If, that is, you can even get their. I must have one of the few
> houses in the world that doesn't have four inches of clearance between
> the top of the wall and the roof deck. The hole in the roof isn't a
> big deal; this is roofing, not rocket science.


Posted by on May 28, 2008, 10:25 pm
> Aaron Fude wrote:
> > Hi,
>
> > I am installing a exhaust fan in a bathroom and the only way out for
> > the vent is through the roof. Can you point me to a resource that
> > describes how to do that? I assume it's more complicated than putting
> > some caulk around the edge... My roof is asphalt shingles.
>
> Really?
>
> When I had my roof re-done a few years ago the roofers took out the dryer
> vent (which went straight up from the center of the house), decked over the
> spot and put down shingles. I didn't realize the dryer was venting into the
> attic until some time later.
>
> Anyway, I was faced with the same conundrum as you and was reluctant to put
> another hole in the roof.
>
> I opted for about 30' of 6" PVC to run the vent to the closest soffit.
>
> Here's a trick: Go UP into the attic about two or three feet, then a
> continuous slope downward to the soffit. That way, most of the fumes that
> condense will drain downhill.


Here are a couple reasons you don't want to do this.
For more, do a search on "attic dryer vent" and maybe add mold.
There is a reason that venting the dryer, bathroom, or anything else
directly into the attic is a code violation.
Worst case, you could lose your roof--and I've read of it happening in
only a few years.

http://www.remasinspections.com/images/BathroomVentMold.jpg

http://www.insightinspectionsllp.com/images/Im001811.jpg

Posted by Red Green on May 27, 2008, 11:10 pm
503e31bd3a83@b1g2000hsg.googlegroups.com:

> Hi,
>
> I am installing a exhaust fan in a bathroom and the only way out for
> the vent is through the roof. Can you point me to a resource that
> describes how to do that? I assume it's more complicated than putting
> some caulk around the edge... My roof is asphalt shingles.
>
> Many thanks in advance!
>
> Aaron

This link is to a bath vent kit you can get at the borg (aka HD or Lowes).
The spec and installation sheet is available from this page.

http://www.broan.com/display/router.asp?ProductID=2471

Posted by hallerb@aol.com on May 28, 2008, 6:22 am
> 503e31bd3...@b1g2000hsg.googlegroups.com:
>
> > Hi,
>
> > I am installing a exhaust fan in a bathroom and the only way out for
> > the vent is through the roof. Can you point me to a resource that
> > describes how to do that? I assume it's more complicated than putting
> > some caulk around the edge... My roof is asphalt shingles.
>
> > Many thanks in advance!
>
> > Aaron
>
> This link is to a bath vent kit you can get at the borg (aka HD or Lowes).=

> The spec and installation sheet is available from this page.
>
> http://www.broan.com/display/router.asp?ProductID=3D2471

i would try hard to vent it thru a eve or gable, the roof can cause
future leaks

Page 2 of 3       < 1 2 3 > last >>
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