ᐅ Which type of screed do you prefer?

Yes, the rubber seals are definitely visible on the clamps. If that has already been done, then “the damage is already done.” I can’t recall any standard that covers this off the top of my head – sorry. Do you have underfloor heating in the utility room where the buffer tank is located? Is there a cement screed in the room where the buffer tank is?

Allthewayup schrieb:

Yes, the rubber parts are definitely visible on the clamps. If that has already been done, then “the damage is already done.” I don’t know offhand any standard that covers this—sorry. Do you have underfloor heating in the utility room where the buffer tank is located? Is there a cement screed in the room where the buffer tank is?

Cement sulfate screed. The underfloor heating is omitted in that area. See the clamps on the pipes in the picture.

The clamps are basically the correct ones. So, if there really is 9cm (3.5 inches) of cement sulfate, it should be able to absorb and distribute the weight quite well. That’s essentially half a slab. I would probably accept that—especially since it’s "only" the utility room—with some reluctance if it’s already been done. In the worst case, the joint in the base tiles might crack, and then you can tell your general contractor that in this case, the argument about the maintenance joint doesn’t hold because EPS is not a load-bearing insulation, and he accepted that together with the buffer storage tank. Then he should also renew the joint, simple as that. But let’s not dwell on problems that haven’t happened yet—let’s fix our crown and look ahead.