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Subject Author Date
Dryer vent GWB 09-28-2007
---> Re: Dryer vent Joseph Meehan09-28-2007
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Posted by GWB on September 28, 2007, 2:11 pm
Is it just me, or is it a really stupid idea to vent a clothes dryer
into the attic?? I can't believe that pumping hot, moist air and lint
into the attic is a good thing. Whaddayathink?



Posted by on September 28, 2007, 2:45 pm
> Is it just me, or is it a really stupid idea to vent a clothes dryer
> into the attic?? I can't believe that pumping hot, moist air and lint
> into the attic is a good thing. Whaddayathink?

Couple of different things here.....one dryer load of exhaust air
equals approx two pints of water in the form of a vapor. If you have
a cold roof with insulation below the inner roof, when the dryer vapor
is exhausted and contacts the underside of the roof sheathing on a
cold winter day it will condense on contact and revert to a solid form
more commonly known as water. It will then either freeze until warmer
temps or run down the sheathing and drip into the insulation. It will
ruin the insulation and eventualy find its way into the sheetrock.
Also will, with time, ruin the roof sheating.

Bottom line vent dryer exhaust outdoors away from the structure.


Posted by terry on September 28, 2007, 3:09 pm
> Is it just me, or is it a really stupid idea to vent a clothes dryer
> into the attic?? I can't believe that pumping hot, moist air and lint
> into the attic is a good thing. Whaddayathink?

Canadian codes, for example, say 'never' vent into attic. Even a well
ventilated one, which some are not.

Reason being that all those pounds of a water can condense up there,
cause rot and mould and roof deterioration. Possibly freeze on
underside of roof and or the roof nails sticking through. Then melt
and drip on ceiling insulation and ceilings. Wet insulation then
useless. And that's not just because many parts of this country are in
cool zones.

Stupid idea. Even drying clothes inside a well sealed house without
adequate ventilation can and has caused severe problems to the
structure. Don't do this to a roof attic. After few years could be a
very expensive repair!


Posted by Dottie on September 28, 2007, 6:58 pm
>
> > Is it just me, or is it a really stupid idea to vent a clothes dryer
> > into the attic?? I can't believe that pumping hot, moist air and lint
> > into the attic is a good thing. Whaddayathink?
>
> Canadian codes, for example, say 'never' vent into attic. Even a well
> ventilated one, which some are not.
>
> Reason being that all those pounds of a water can condense up there,
> cause rot and mould and roof deterioration. Possibly freeze on
> underside of roof and or the roof nails sticking through. Then melt
> and drip on ceiling insulation and ceilings. Wet insulation then
> useless. And that's not just because many parts of this country are in
> cool zones.
>
> Stupid idea. Even drying clothes inside a well sealed house without
> adequate ventilation can and has caused severe problems to the
> structure. Don't do this to a roof attic. After few years could be a
> very expensive repair!



Don't know where you live, but here in FL a lot of dryer vents go
through the attic and out the roof. My vent kept getting clogged so I
called a man who fix ed my neighbors - he rerouted it. It goes up to
the attic and across to the soffit and outside there. It has worked
fine since he moved it. If I sell the house, the new owner can take
his choice of how to do it.


Posted by Forrest on September 28, 2007, 7:24 pm

>>
>> > Is it just me, or is it a really stupid idea to vent a clothes dryer
>> > into the attic?? I can't believe that pumping hot, moist air and lint
>> > into the attic is a good thing. Whaddayathink?
>>
>> Canadian codes, for example, say 'never' vent into attic. Even a well
>> ventilated one, which some are not.
>>
>> Reason being that all those pounds of a water can condense up there,
>> cause rot and mould and roof deterioration. Possibly freeze on
>> underside of roof and or the roof nails sticking through. Then melt
>> and drip on ceiling insulation and ceilings. Wet insulation then
>> useless. And that's not just because many parts of this country are in
>> cool zones.
>>
>> Stupid idea. Even drying clothes inside a well sealed house without
>> adequate ventilation can and has caused severe problems to the
>> structure. Don't do this to a roof attic. After few years could be a
>> very expensive repair!
>
>
>
> Don't know where you live, but here in FL a lot of dryer vents go
> through the attic and out the roof. My vent kept getting clogged so I
> called a man who fix ed my neighbors - he rerouted it. It goes up to
> the attic and across to the soffit and outside there. It has worked
> fine since he moved it. If I sell the house, the new owner can take
> his choice of how to do it.

"Through the attic and out the roof" is not the same as *into* the attic.
Duh



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