Went to look at a neighbor's slab that's ready for house raising, there's only plastic under the sill and round "rubber bands" at the sides? Don't they use sill paper anymore? Better check how they plan to do with our house...
Isn't it a sylltätning then e.g. http://www.beijerbygg.se/templates/BB_Produkt.aspx?id=5266
No, there is no sealant for the sill. (it looked fine)
They have installed regular (aging-resistant) construction plastic and round rubber bands.
There will be heating in the slab, but what happens if water gets onto the sill?
They have installed regular (aging-resistant) construction plastic and round rubber bands.
There will be heating in the slab, but what happens if water gets onto the sill?
My carpenters use something called S-list, it is gray, 125mm wide plastic foam with two longitudinal "pipes" in the same material. This is supposed to keep the thermal bridges away.
I have seen similar too. A black strip that contains 2 rubber strips. It was the only thing placed between the plate and the beam. Apparently, that's how it's supposed to be now, according to the craftsman.
Syllpapp seems to be a bit old.
Syllpapp seems to be a bit old.
If you have a crawl space instead of a slab, what function does the sill paper serve?
With a slab, there could be a gap directly into the house if it's not sealed.
With a crawl space, that problem doesn't exist.
Does it have to do with moisture in the leca blocks?
With a slab, there could be a gap directly into the house if it's not sealed.
With a crawl space, that problem doesn't exist.
Does it have to do with moisture in the leca blocks?
Heard from a knowledgeable carpenter that today's sill insulation (black rubber sheet with two "pipes" on the sides) works in such a way that it is the pipes themselves that seal. It's good if there is a little air above/below the middle part. Adding a paper as well, I understood, would only make things worse.
As usual, I believe that there are as many different ways to do things as there are people doing them. I don't think you need to worry.
What was explained to me is that if you place two moisture barriers against each other, the space between them cannot breathe. You'll get a capillary action that can draw in moisture from the side, which then has nowhere to go. If you have some wood chips lying there, it can become problematic. With only one moisture barrier, what's under the barrier can breathe through the concrete and what's on top through the wood.
However, I don't think one should exaggerate the whole issue. But it was this explanation that I "bought" when I was considering being extra sure with two barrier layers.
What was explained to me is that if you place two moisture barriers against each other, the space between them cannot breathe. You'll get a capillary action that can draw in moisture from the side, which then has nowhere to go. If you have some wood chips lying there, it can become problematic. With only one moisture barrier, what's under the barrier can breathe through the concrete and what's on top through the wood.
However, I don't think one should exaggerate the whole issue. But it was this explanation that I "bought" when I was considering being extra sure with two barrier layers.
Inger P:
No, of course you don't have sill paper under the foundation wall at a crawl space but on top of, between the concrete and the sill, which the joist and the wall sit on.
The experts say there should be a moisture barrier, e.g., foundation paper YEP 2500, which I will follow, but I still wonder how important it is.
In some way, they believe that the foundation wall would be more humid than the sill, which could lead to rot.
No, of course you don't have sill paper under the foundation wall at a crawl space but on top of, between the concrete and the sill, which the joist and the wall sit on.
The experts say there should be a moisture barrier, e.g., foundation paper YEP 2500, which I will follow, but I still wonder how important it is.
In some way, they believe that the foundation wall would be more humid than the sill, which could lead to rot.