Hello. I have a house from '65 with a basement.
We are thinking of laying tiles in the basement directly on the concrete. It's not a bathroom or laundry area where we will be laying tiles. We've had different craftsmen for quotes, and most of them have explained/described how the whole process should go and which products should be used. What I wonder is that some talk about primer and some think it's not necessary. According to the craftsmen, it's for better adhesion.
Primer is used as moisture protection. It's a hallway and a room where the tiles will be laid. I'm thinking the floor needs to breathe and it's directly on the slab.
Am I wrong? Or is there a specific primer that should be used?
We are thinking of laying tiles in the basement directly on the concrete. It's not a bathroom or laundry area where we will be laying tiles. We've had different craftsmen for quotes, and most of them have explained/described how the whole process should go and which products should be used. What I wonder is that some talk about primer and some think it's not necessary. According to the craftsmen, it's for better adhesion.
Primer is used as moisture protection. It's a hallway and a room where the tiles will be laid. I'm thinking the floor needs to breathe and it's directly on the slab.
Am I wrong? Or is there a specific primer that should be used?
Okay. But is it primer that is used in wet areas. Any brand you can recommend.
Just make sure the concrete is clean, if you've walked on it for a year, there will be deposits. A scrub brush first and then vacuuming is good. As they say, no tile adhesive directly on the concrete, as it might not adhere properly; preferably two times with primer, the first one a bit more diluted so it absorbs well. You can use pretty much any concrete primer you want,
Well, there's no point in applying primer twice. A normal mixture is 1:3 for concrete surfaces. More important is that it's clean, so thorough vacuuming is essential, AND brushing the primer into the substrate rather than using a roller or similar. I think the original poster is confusing primer with a waterproofing layer; primer is also used before the waterproofing layer, specifically for adhesion. In the past, when "primer" was used as a waterproofing layer, it was easier to mix them up, mostly because it was so thin. So when we talk about primer now, it's not the waterproofing layer itself.
Ok. So the procedure is to brush on the concrete slab, vacuum clean it, and then brush the primer directly onto the concrete slab.
Then apply the fix and klinlkli on everything. Is that the correct order?
Then apply the fix and klinlkli on everything. Is that the correct order?
In membrane systems of the rolled type, a "primer" is applied as the first layer. However, it is a much more advanced product than a primer. It is often called a vapor barrier, and it is the one that provides extremely high sealing. The rubber-like compound that is then rolled on is not very dense. In rolled systems, you first have the vapor barrier, which prevents water vapor present in the air from penetrating large wall surfaces. The vapor barrier is thin and easily cracks. It's not a big deal if there are small cracks in the vapor barrier, as vanishingly small amounts of water vapor find the crack. However, if there is flowing water, micro-cracks are not good, as they draw in water. That's why the rolled rubber-like compound is used. It is not particularly vapor-tight, but it stops water. And it is elastic, so it does not crack.
The vapor barrier resembles a primer, as it is fluid.
The vapor barrier resembles a primer, as it is fluid.
Yes, in principle. One should perhaps check that the concrete is somewhat level; otherwise, self-leveling compound might be needed.M Martin_355 said: