Home Page link

mysterious mold spots on ceiling

Home| Search | About
Login Password
Register Now! Lost Password?

Home Repair - - If it ain't broken, don't fix it. Otherwise look here. 

Page 1 of 3       1 2 3 > last >> Bookmark this page:  YahooMyWeb Yahoo!  Google Google  Windows Live Favorites Windows Live  del.icio.us del.icio.us  digg digg  Add to Netscape Netscape
Subject Author Date
mysterious mold spots on ceiling davethieben 02-27-2007
If you were  Registered and logged in, you could reply and use other advanced thread options
Posted by davethieben on February 27, 2007, 10:43 am


We've lived in this house for almost 3 years now, and every now and
then, a spot of mold (5-7" long, 2-5" wide) will appear on outside
walls where the ceiling meets the wall. i've been all over the attic
(not fun) looking for damp roofing and rafters, and I even opened up
the soffits outside to look at the top of the drywall, and everything
looks fine. I cannot figure out where the mold is coming from. any
ideas?

my brother in law suggested my attic does not have enough
ventilation. right now it has one fan in the middle of the house, and
vents every 8' or so in the soffits in the overhangs.

thanks.


dave


Posted by Speedy Jim on February 27, 2007, 10:52 am


davethieben wrote:
> We've lived in this house for almost 3 years now, and every now and
> then, a spot of mold (5-7" long, 2-5" wide) will appear on outside
> walls where the ceiling meets the wall. i've been all over the attic
> (not fun) looking for damp roofing and rafters, and I even opened up
> the soffits outside to look at the top of the drywall, and everything
> looks fine. I cannot figure out where the mold is coming from. any
> ideas?
>
> my brother in law suggested my attic does not have enough
> ventilation. right now it has one fan in the middle of the house, and
> vents every 8' or so in the soffits in the overhangs.
>
> thanks.
>
>
> dave
>

Cold where you live? Insulation voids will create
cold spots where moisture in the house can condense.
If you use a humidifier in winter, that will increase
the odds.

On a cold day, you may be able to feel the temp
differential by moving the palm of your hand over the wall.

Jut one possibility to look at.

Jim

Posted by davethieben on February 27, 2007, 11:14 am


yes, I live in Ohio. would that be insulation in the soffits outside,
or insulation over that area in the attic?


thanks.


Posted by Speedy Jim on February 27, 2007, 11:44 am


davethieben wrote:

> yes, I live in Ohio. would that be insulation in the soffits outside,
> or insulation over that area in the attic?
>
>
> thanks.
>

Could be attic or in the wall stud space.
The latter because the existing insulation may have settled.

The suggestion to consider ice dams is worth looking at too.

Jim

Posted by Lawrence on February 27, 2007, 11:15 am


> We've lived in this house for almost 3 years now, and every now and
> then, a spot of mold (5-7" long, 2-5" wide) will appear on outside
> walls where the ceiling meets the wall. i've been all over the attic
> (not fun) looking for damp roofing and rafters, and I even opened up
> the soffits outside to look at the top of the drywall, and everything
> looks fine. I cannot figure out where the mold is coming from. any
> ideas?
>
> my brother in law suggested my attic does not have enough
> ventilation. right now it has one fan in the middle of the house, and
> vents every 8' or so in the soffits in the overhangs.
>
Since it is near an outside wall I suspect an ice dam is causing the
problem. This is related to ventilation since ideal ventilation would
minimize or eliminate the problem.

In the real world even well ventilated attics can have the ice dams if
the conditions permit. Large snowfall followed by thawing and
freezing creates an ice dam which holds snow melt back and prevent it
from draining. A lot of water can collect behing the dam. At that
point it can cause a leak which could explain the mold.

Is there snow and ice where you are? If so, perform an inspection of
the roof and remove the snow if necessary. Then you can use an ice
melting salt sprinkled on the ice at the edge of the roof.


Page 1 of 3       1 2 3 > last >>
Similar ThreadsPosted
Shiny Spots on T&G Pine Ceiling???? July 3, 2008, 7:09 pm
Weirdest Post You'll Read Today--Suicide and "Spots on Ceiling" January 8, 2006, 7:56 am
Mysterious sudden large flakes of ceiling paint coming down April 19, 2006, 7:22 pm
Removal of mold and mildew in ceiling after water leak February 10, 2007, 7:21 pm
Mold remediation and disinfection. Mold Busters. (http://www.bustmold.com ) November 7, 2006, 5:05 pm
Mold remediation and disinfection. Mold Busters. (http://www.bustmold.com ) November 7, 2006, 5:33 pm
Do you think mold can be killed with mold? September 29, 2008, 11:47 pm
Spots on Drywall? October 12, 2005, 4:46 am
interior black spots ??? November 23, 2005, 9:38 pm
oil spots under Maytag washingmachine December 21, 2005, 9:59 am

Contact Us | Privacy Policy

XML SitemapXML Sitemap