|
Posted by Jimbo on June 13, 2005, 9:01 pm
Bill:
The building is sitting on a poured concrete pad and none of brick is below
grade. The new peaked roof over hangs the old flat roof and all the
eavestrough are in good shape but one of the down spouts is very close to
the foundation of the building. You have got me wondering if the slab is
picking up a lot of water and that water is being drawn up into the block
wall. If thats not one of the causes does anyone think the fact that we
have had about 6 days where the relative humidity has been around 85% to
94%?
Jimbo
> If I understand you correctly, the condensation is on the outdoor side of
> the vapor barrier, and only on the walls.
> It seems like there must be a higher than normal moisture content in the
> block walls, because I can't believe
> that enough airborne humidity can go thru the block wall and insulation
> and still hit a dewpoint on the barrier.
> My first guess, especially if the problem is not all that uniform along
> the walls, is that relatively large amounts of water are making their way
> into the interior of the block wall, and subsequently soaking the cement.
> In effect, you would be storing water in the hollows of the blocks. Any
> chance their is a leak somewhere into the old flat roof parapets,
> scuppers, etc?
> Are parts of the walls below grade?
>
> Bill
>
>
>
>>I stand to be corrected but if the moisture is behind the sealed vapor
>>barrier it has to be coming through the block walls of my shop. A
>>dehumidifier only removes moisture from inside the building not water on
>>the inside of a wall covered with vapor barrier and drywall. As far as
>>not installing a vapor barrier that's not an option because those of us
>>living in the North know that a vapor barrier is a must if you want to cut
>>heating bills and protect your building from rot and fungus.
>>
>> Jimbo
>>
>>
>>> vapor barrier is only a good idea in areas that have A/C or a
>>> dehumidifier, otherwise vapor barrier no good
>>>
>>> either house has to breathe, or else be dehumidified some way
>>>
>>> or else, you could always just move to Arizona
>>>
>>
>>
>
| 
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap