repairing drywall
#1
08-29-09, 11:01 AM
repairing drywall
Due to watching a television show I was watching, when built the walls in my bedroom I put paper backed insulation in then over top of that I put plastic before putting on the drywall. Now my problem is I am starting to get mold along the bottom of the walls that are my outside walls. My question is was I wrong to put the plastic, Should it come off? Is the mold caused from the plastic being on the wall? Is it not allowing it to breathe?
#3
08-29-09, 03:49 PM
Welcome to the forums!
You aren't suppose to have a double barrier but I'd be suprised if that was a big issue. Are the rooms humid? Do you run a HVAC? What is the exterior wall clad with?
You aren't suppose to have a double barrier but I'd be suprised if that was a big issue. Are the rooms humid? Do you run a HVAC? What is the exterior wall clad with?
#4
09-01-09, 05:58 PM
The rooms are not humid and they do not have HVAC run in them. The exterior walls have 1/2 inch insulation board with siding. Is the plastic making it so the walls can not breathe? How do I go about fixing it? Should I take all of the drywall off or just halfway up the wall? Any suggestions on how to fix it?
#5
09-02-09, 04:28 AM
Is there house wrap or tar paper over the insulation board behind the siding? Sometimes this step gets skipped and when rain is forced behind the siding instead of running down the wall it can go into the wall.
#6
09-02-09, 06:14 AM
Years ago, a large home builder got bit by building homes that sealed the walls from both directions, causing interior wall mold and rot.
Is this problem occuring now, at this time of year? The reason I ask, is often, wall molds occur at a cooler time of the year when condensation can occur(when not caused by exterior water entry), often due to flaw in how the insulation and barrier was installed, especially in corners, where sometimes it is hard to get the adequate amount. In these cases condensation occurs when the dew point is met. it occurs on the warmer side, after cool outside air is in contact with it. Same affect as with sweating windows in the winter.
The reverse could be true, under the right circumstances, if the room where cool, say along the floor, which would be natural, and you had hot humid nights out. Then, if insulation was say poorly applied (gaps) near the base of the wall, it could condense in the wall itself.
But I'd like to know more about your entire structure, and what you mean by that you built your bedroom walls. Did you just build new bedroom walls? Nothing else? Why? Did you build a wing addition to the house, and that wing basically is a the bedroom? If so, is it new enough so that you do not know if any previous water entry could have ever occured before you did the interior work? For example, I have seen cases where due to flaws in the drip edge/eave area, water entered sturcture and got into the walls.
Is this problem occuring now, at this time of year? The reason I ask, is often, wall molds occur at a cooler time of the year when condensation can occur(when not caused by exterior water entry), often due to flaw in how the insulation and barrier was installed, especially in corners, where sometimes it is hard to get the adequate amount. In these cases condensation occurs when the dew point is met. it occurs on the warmer side, after cool outside air is in contact with it. Same affect as with sweating windows in the winter.
The reverse could be true, under the right circumstances, if the room where cool, say along the floor, which would be natural, and you had hot humid nights out. Then, if insulation was say poorly applied (gaps) near the base of the wall, it could condense in the wall itself.
But I'd like to know more about your entire structure, and what you mean by that you built your bedroom walls. Did you just build new bedroom walls? Nothing else? Why? Did you build a wing addition to the house, and that wing basically is a the bedroom? If so, is it new enough so that you do not know if any previous water entry could have ever occured before you did the interior work? For example, I have seen cases where due to flaws in the drip edge/eave area, water entered sturcture and got into the walls.
#7
09-02-09, 08:44 PM
Correct, the plastic is not for your area. Read this on air barriers, vapor retarders, and climate areas: BSD-012: Moisture Control for New Residential Buildings —
Rip it out to get to the mold.
Be safe, G
Rip it out to get to the mold.
Be safe, G
