ᐅ Installing brick slips, unheated calcium silicate blocks

Hello

I want to install brick slips.
The room is unheated and the exterior wall is made of calcium silicate bricks.
I was thinking of attaching Styrodur insulation panels directly to the bricks, possibly securing the insulation boards further with some anchors.
Then I would fix the brick slips on top.
Does that sound reasonable?
I would prefer to grout the joints using a slurry method, as it is faster than traditional pointing. What should I be aware of beforehand? Obviously, the brick slips must not be too uneven. Anything else?

Regards

Steven

If you insulate an unheated room from the inside with Styrodur (extruded polystyrene), you are essentially placing the dew point within the wall and shifting it outward toward the plaster.

You want it to be warmer inside than outside; otherwise, you wouldn't want to insulate from the inside. Where the warm and cold areas meet, moisture will condense.

If you absolutely must use brick slips (thin bricks) on the inside, I would install them in unreinforced mortar applied in a thick bed (unreinforced meaning without plastics or resins), preferably natural stone and laid loosely without grouting.

If the goal is to increase warmth, I would consider calcium silicate boards and treat them only with mineral-based coatings.

Good luck
Gabriele

Hello fach1werk

I didn’t express myself clearly.
The thin brick veneers are meant to be applied on the outside of the wall. The insulation is not primarily intended as such. It is simply to even out the wall (without plastering) and provide an ideal surface for the veneers.

Steven