Foam plastic on cinder blocks.

[kainu]

Hello!
I'm in the process of building a garage and due to uneven ground conditions, I've had to lay one course of leca on the slab.

The wall construction is 170 frame, 45x45, 28 spacing, osb, plasterboard which means the wall ends up slightly outside the leca. Can you place cell plastic/ground insulation outside the leca to align with the wall? Outside the leca/cell plastic, I'm planning to continue with a row of tiles.

 

[justusandersson]

It is quite common to have a plinth that is slightly recessed relative to the wall surface. If you render the leca and then put tiles, you can accept the wall protruding several centimeters. You get a much more durable solution that way.

Extra insulation should preferably be on the outside, even if it doesn't matter much when the leca is thick. Leca walls should be rendered on both sides to become airtight. Perhaps not so important in a garage, but you have some heating on, right?

 

[kainu]

It is quite common to have a baseboard that is slightly recessed relative to the wall surface. If you plaster the leca and then install tiles, you can accept the wall protruding several centimeters. You get a much more durable solution that way.

Extra insulation should preferably be on the outside, even though it doesn't matter much when the leca is thick. Leca walls should be plastered on both sides to become airtight. Maybe not so important in a garage, but you do have some heating on, right?

Hi,
I will have 18-20 degrees in the garage. Is it important to plaster the leca or can you install tiles directly on it? Does leca insulate at all?

 

[justusandersson]

Leca has an insulation value of 20-30% of mineral wool's, so it does insulate. Whether it is important to plaster in this case depends on whether the Leca stone is above ground level. If it is, I think you should plaster it on the outside first and foremost. You can put tiles directly on the Leca. If you want to reduce the difference to the wall surface, the plaster helps.

 

[kainu]

Lecan has an insulation value that is 20-30% of mineral wool's, so it does insulate. Whether it's important to plaster in this case depends on if the Leca stone is above ground level. If it is, I think you should plaster it on the outside first and foremost. You can put tiles directly on the Leca. If you want to reduce the difference with the wall surface, the plaster helps.

Hi, the Leca stone is above ground level, and I have already plastered the outside.

Thanks for the response!

 

[largab]

Yes, it works perfectly to fill up with EPS. Glue it as thick as you can without it sticking out. Glue with regular winter foam adhesive. Use a plank so you can apply pressure on the EPS while it dries. Then you can place tiles directly on it.

 

[Peter2400]

I think it feels better with a board intended for mounting tiles on. https://www.byggmax.se/badrum/tätskikt/våtrumsskiva-p660021 How much do you want to extend the wall?