Hello,
I have an exterior wall where it turned out that someone messed up badly and made a hole in the vapor barrier. The wall is constructed as follows, seen from the inside: gypsum - plywood - vapor barrier - studs/insulation, etc. Near the floor in one spot, they cut out a piece of the sill plate and 10 x 20 cm of the plywood (probably a misunderstanding about a drain to be routed up the wall, this is a laundry room). Then they applied a patch of the vapor barrier and covered it with drywall (between plywood and gypsum, not behind plywood where the rest of the vapor barrier is).
Now that I've torn down the drywall near the floor for various reasons and discovered this, I want to make a better joint of the plastic with a proper overlap. However, this requires that I can remove the plywood from a reasonably large area between two studs to create an overlap. I don't want to tear down the entire wall. Is it possible? Does anyone have tips on how I can do this?
Best regards,
Magnus
I have an exterior wall where it turned out that someone messed up badly and made a hole in the vapor barrier. The wall is constructed as follows, seen from the inside: gypsum - plywood - vapor barrier - studs/insulation, etc. Near the floor in one spot, they cut out a piece of the sill plate and 10 x 20 cm of the plywood (probably a misunderstanding about a drain to be routed up the wall, this is a laundry room). Then they applied a patch of the vapor barrier and covered it with drywall (between plywood and gypsum, not behind plywood where the rest of the vapor barrier is).
Now that I've torn down the drywall near the floor for various reasons and discovered this, I want to make a better joint of the plastic with a proper overlap. However, this requires that I can remove the plywood from a reasonably large area between two studs to create an overlap. I don't want to tear down the entire wall. Is it possible? Does anyone have tips on how I can do this?
Best regards,
Magnus
Maybe you can place a strip of tape on the edge of the plastic with the back towards the insulation. Then splice in a cut piece of plastic wrap and apply another strip of tape from the inside. The flex in the insulation allows you to create a small gap to insert the tape. That should make it completely sealed.
Another option could be to spray a little polyurethane foam behind the plastic edge and then let it expand so that the hole is filled. What grows outside the plywood you can just saw off with a Japanese saw or similar when it has dried. Then just plaster over and look happy =)
Personally, I would choose the second option since it's likely the quickest and becomes completely sealed as polyurethane foam has a closed cell structure.
Good luck..
Another option could be to spray a little polyurethane foam behind the plastic edge and then let it expand so that the hole is filled. What grows outside the plywood you can just saw off with a Japanese saw or similar when it has dried. Then just plaster over and look happy =)
Personally, I would choose the second option since it's likely the quickest and becomes completely sealed as polyurethane foam has a closed cell structure.
Good luck..