Choice of materials behind OSB/drywall on an interior wall that is an exterior wall?
Hello! We are renovating a kitchen in a house from 1925 where we have now torn down all the interior walls with plaster or paneling down to the wide thick planks that all the walls in the entire house consist of. The planks are 5-6cm thick and between 15-25cm wide, really solid! Outside of these is some kind of plaster façade, unclear if/how it is insulated, and right now it is additionally insulated outside the original plaster and clad with a metal façade that we are going to remove and replace with new insulation and a wooden façade (I don't know if this matters for my question, so I'm including it). Now to my question: We are going to put up OSB or plywood + drywall on the inside of all the kitchen walls, but then we got the tip to put "black paper" behind the OSB/drywall against the thick wooden planks. We had this paper at home since we used it on another interior wall of thick planks that was to be plastered, and then we didn't want to put the plaster directly on the thick planks since they could swell from the moisture in the plaster, and then shrink again causing the plaster to crack. So the black paper functions as some sort of moisture barrier. But that was a completely different application, now we're not plastering. Is there any reason to want to put this paper behind OSB/drywall in the kitchen? Is there any reason not to do it, i.e., could the house become too tight causing moisture problems or something else?
There is no reason to put paper against the flat wall. It is a waste of material. Plastering on paper sounds a bit strange as well, but maybe that's a subject for another thread.
Your plank wall is probably not completely straight. Take the opportunity to frame with, for example, 45mm studs and ensure that the new inner wall becomes perfectly vertical and the walls perpendicular. This significantly facilitates the subsequent kitchen installation. It also provides space for the installation of water and electricity that might need to go to new places during the renovation.
Your plank wall is probably not completely straight. Take the opportunity to frame with, for example, 45mm studs and ensure that the new inner wall becomes perfectly vertical and the walls perpendicular. This significantly facilitates the subsequent kitchen installation. It also provides space for the installation of water and electricity that might need to go to new places during the renovation.
Thank you for the good response. We would need every centimeter of width in the kitchen to achieve the layout we desire. Therefore, we would have liked to skip the 45-regels but you definitely have a point. We already know that water needs to be routed across to the other side of the kitchen from where we find it today. A thought: can one embed water and electricity in the floor where we plan to install underfloor heating with tiles?
Sure, you can lay water and electricity in the floor - the question is whether there's enough space if you're pouring the floor. It might be easiest to open the floor at a suitable spot and lay the pipes underneath.
EDIT: When I did a similar operation here in the house, I lifted the old subfloor, straightened the old floor joists, laid a sparse panel with gv pipes in it, and then a couple of layers of floor gypsum on top. I wanted to avoid floating the floor since it seemed both expensive and tricky. Another option could be grooved chipboard, but that probably requires floor joists closer together than what you have if you're going to have tiles on.
EDIT: When I did a similar operation here in the house, I lifted the old subfloor, straightened the old floor joists, laid a sparse panel with gv pipes in it, and then a couple of layers of floor gypsum on top. I wanted to avoid floating the floor since it seemed both expensive and tricky. Another option could be grooved chipboard, but that probably requires floor joists closer together than what you have if you're going to have tiles on.