Cracked Thermolite blocks in garage?

[deano37]

Hi There.

I would be very grateful if somebody could offer some advice on what could be the cause of cracked thermolite blocks that i have seen on a recent property viewing?

The cracked blocks are on the 3 internal garage walls, vertical cracks floor to ceiling spaced about 1 - 2 ft apart, so quite a few.







Do these blocks provide
structural strength or are they more for insulation?
The external brickwork has no cracks. The property is 23 years old.

I must admit it does look quite worrying when viewing a property that you like.

Any information is much appreciated

Deano

 

[^woody^]

It's common, and can happen any time even after decades.

Its shrinkage, the mortar is too strong, so the blocks cracks with temperature or humidity changes - or excess moisture in the cavity. I suspect that very house built with those blocks has some cracks like that.

Typically they can be left and the wall will be OK.