Hello!
During the renovation of my 70s brick house, I encountered some moisture/mold in one area of the house.
Because of this, I made holes in the walls in other (hopefully?) well-selected spots in the house to check for mold elsewhere. Fortunately, it doesn't seem to be the case, but now I've damaged the waterproof layer at the back of the drywall. 🙈 The waterproof layer resembles thin oilcloth, maybe it's plastic? It's certainly part of the drywall panels. I made the holes at the bottom near the floor (by the way, it's a slab-on-grade house), so I can hide the unsightly repair with baseboards.
But now I want to seal the holes and am worried about not knowing how to ensure that moisture doesn't get in.
Any tips?
But:
- I don't want to replace entire panels, just repair the holes.
- The holes are about 5x10 cm in the drywall, and the holes in the waterproof layer are very small, about 2x3 cm.
During the renovation of my 70s brick house, I encountered some moisture/mold in one area of the house.
Because of this, I made holes in the walls in other (hopefully?) well-selected spots in the house to check for mold elsewhere. Fortunately, it doesn't seem to be the case, but now I've damaged the waterproof layer at the back of the drywall. 🙈 The waterproof layer resembles thin oilcloth, maybe it's plastic? It's certainly part of the drywall panels. I made the holes at the bottom near the floor (by the way, it's a slab-on-grade house), so I can hide the unsightly repair with baseboards.
But now I want to seal the holes and am worried about not knowing how to ensure that moisture doesn't get in.
Any tips?
But:
- I don't want to replace entire panels, just repair the holes.
- The holes are about 5x10 cm in the drywall, and the holes in the waterproof layer are very small, about 2x3 cm.
Yes, that would have worked, but I can't access the back of the plasterboard to tape it.T Tompafix said:
It's not possible to remove the panels without breaking them.
Is there any type of foam or similar that would work? Something that doesn't absorb moisture then.
I don't think it's that tricky. You can probably leave it as is. But if you absolutely want to fix it, the plastic itself needs to be taped for it to make any sense. If you can enlarge the hole in the drywall so that you can tape the hole in the plastic, you can screw wooden strips on the back of the drywall, which you can then screw a piece of drywall onto. Then you spackle and paint. It's possible to make the repair completely invisible.
What kind of ventilation system do you have? If you have natural draft, it is ironic to seal when there are natural gaps that act as ventilation.
Good point. I know too little about why there are different plasterboards against the exterior wall studs than on the interior walls. 🫤K kniv said:
I guess it's natural ventilation, LLVP, and direct electricity for heating.
Trying to find out if I need to install proper vents in the bedrooms since there's some "häxsot" and thermal bridges that have blackened the ceiling and walls.
Different plaster on exterior and interior walls? What is the difference?
And since you didn't mention FTX or mechanical supply/exhaust ventilation, it's natural ventilation (most common in older houses). In that case, I would skip trying to seal the vapor barrier. I'm guessing it's also not very modern, so it's probably not the most airtight...
And since you didn't mention FTX or mechanical supply/exhaust ventilation, it's natural ventilation (most common in older houses). In that case, I would skip trying to seal the vapor barrier. I'm guessing it's also not very modern, so it's probably not the most airtight...