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basement condensation
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| nagy2131 2007-12-09, 9:25 am |
| I'm finishing my basement and was installing a new cable for cable t.v..
While cutting through the wall I noticed condesation on the back side
(towards the block) of my insulation. I'm wondering if I have a potential
problem or if this condensation will eventually evaporate. I sealed the
concrete block walls with Drylock and built a 2 x 4 wall with insulation
batts between the studs. I left a 1 1/2" - 2" air space between the back
side of the stud wall and block wall to allow for air circulation. With it
being December and the weather cold (20 degrees) I'm wondering if this is
normal condensation that will be gone once the weather gets warmer.
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| jloomis 2007-12-09, 9:25 am |
| Heat and Cold produce condensation. Conditioned space ie. interior of
basement is warm and exterior space ie. block wall face is cold thus
moisture.
I am wondering if a person could, without problem, vent the space between
the insulated wall and the block. I realize this is impractical by venting
into the room since the room is insulated. Could vents be made to allow the
moist warm air trapped between the wall and the block to escape out?
Dyylock is doing its job and so is the insulation.....
I actually think this is a common problem on many southern facing insulated
walls in homes and or garages.
If you look at many of these exterior painted walls you can see stud
outlines and spacing highlighted by a darker color in the paint or exterior
coating(mold or fungus).
I think the moisture gets trapped and drips down the wall and creates an
enviornment for this to happen.
We should just live in TP's
jloomis
"nagy2131" <u39746@uwe> wrote in message news:7c6e795cf520b@uwe...
> I'm finishing my basement and was installing a new cable for cable t.v..
> While cutting through the wall I noticed condesation on the back side
> (towards the block) of my insulation. I'm wondering if I have a potential
> problem or if this condensation will eventually evaporate. I sealed the
> concrete block walls with Drylock and built a 2 x 4 wall with insulation
> batts between the studs. I left a 1 1/2" - 2" air space between the back
> side of the stud wall and block wall to allow for air circulation. With
> it
> being December and the weather cold (20 degrees) I'm wondering if this is
> normal condensation that will be gone once the weather gets warmer.
>
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| marson 2007-12-09, 1:25 pm |
| [color=darkred]
>
> "nagy2131" <u39746@uwe> wrote in messagenews:7c6e795cf520b@uwe...
No condensation is "normal". It's not a good thing and should always
be avoided. But whether the condensation you describe is a fatal
error or whether it minor enough that it will dissipate I can't say.
I'd monitor it and see what happens when the weather warms up.
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| 9-11 What did Rudy Goonliani know? 2007-12-09, 5:25 pm |
| You better rip that insulation off and do the job right as you risk a
breeding ground for dangerous molds that can and do kill people.
You should have had a layer of polyethylene on top of the concrete block to
form an impervious barrier before the insulation was applied to the surface.
You leave the condition at your own risk. Furthermore, the states are
getting serious about laws that had to be created because there were and are
guys like you that are a.) cheap and wanted to save alousy twenty bucks on a
roll of poly , b.) ignorant and didn't know better or c.) assholes who will
leave the job unfinished anyway as-is and try to pass it off to a buyer.
If you are the latter I do hope you get the stick shoved up your XXX by the
home inspectors when you get caught trying to pass this on to a buyer as
this condition does get worse and it does get people ill and it can and has
and will result in death. Condensation in between insulation is a breeding
ground for mold and mold is nothing to fuck around with.
"nagy2131" <u39746@uwe> wrote in message news:7c6e795cf520b@uwe...
> I'm finishing my basement and was installing a new cable for cable t.v..
> While cutting through the wall I noticed condesation on the back side
> (towards the block) of my insulation. I'm wondering if I have a potential
> problem or if this condensation will eventually evaporate. I sealed the
> concrete block walls with Drylock and built a 2 x 4 wall with insulation
> batts between the studs. I left a 1 1/2" - 2" air space between the back
> side of the stud wall and block wall to allow for air circulation. With
> it
> being December and the weather cold (20 degrees) I'm wondering if this is
> normal condensation that will be gone once the weather gets warmer.
>
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| CWatters 2007-12-10, 9:25 am |
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"9-11 What did Rudy Goonliani know?" <nobody@nowhere.com> wrote in message
news:475c581b$0$4971$4c368faf@roadrunner.com...
> You better rip that insulation off and do the job right as you risk a
> breeding ground for dangerous molds that can and do kill people.
>
> You should have had a layer of polyethylene on top of the concrete block
to
> form an impervious barrier before the insulation was applied to the
surface.
It's not clear which way the damp is going but as well as tanking the
basement there should be a vapour barrier on the inside. In the UL it would
most likely be on the warm side of the insulation. It's to stops warm damp
air from the house going through the plasterboard/drywall, through gaps in
the insulation and condensing on the cold surfaces.
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"nagy2131" <u39746@uwe> wrote in message news:7c6e795cf520b@uwe...
> I'm finishing my basement and was installing a new cable for cable t.v..
> While cutting through the wall I noticed condesation on the back side
> (towards the block) of my insulation. I'm wondering if I have a potential
> problem or if this condensation will eventually evaporate. I sealed the
> concrete block walls with Drylock and built a 2 x 4 wall with insulation
> batts between the studs. I left a 1 1/2" - 2" air space between the back
> side of the stud wall and block wall to allow for air circulation. With
> it
> being December and the weather cold (20 degrees) I'm wondering if this is
> normal condensation that will be gone once the weather gets warmer.
>
You may want to take a look at these write ups.
http://www.buildingscience.com/sear...leText=basement
Mike
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