Repair of cracked and detached Mexitegel on 70s house

[Ironside]

Hello,

We have a wooden house from the 70s with a Mexitegel facade. For the most part, it looks good, but in some places, it has cracked and come loose. In some cases, 2–3 bricks have come loose in a group while the mortar remains. My question is if it's okay to glue them back with some kind of stone adhesive, or if one must chisel out the joints and apply new mortar? The walls are not load-bearing but purely for appearance.

 

[TommyC]

I haven't tried that specifically, but I wouldn't hesitate to do so. I have successfully glued slate tiles with bathroom silicone on our terrace. I got the idea from the installation instructions for a fireplace that I helped a friend to assemble. They used bathroom silicone to mount soapstone on the outside of the fireplace.

Edit: Mexitegel might be sensitive to the shade if what you're gluing with peeks out beyond the joint, but it may not need to. Probably easier to get it nearly invisible compared to color-matching new joint compound to the older one. It's likely possible to glue stone with a variety of adhesives, but it's probably wise to check that the temperature range is sufficient first.

 

[Plupp 382478]

Glue. Smart idea!
Be careful not to spill. It's usually harder to color match the joint as it's common to have color variations with mexitegel.

 

[Ironside]

Yes, it ended up being Tec7 and Biltema's multibond, i.e. stuff I had at home, hope it lasts in the long run.