Garage chips - Waffle Foam showing

Tallg18 · Jul 09, 2020 6:31 pm

Hi all, first time poster. Looking for some advice regarding chips appearing in the concrete of my garage. As per the pictures you can seen waffle foam just beneath the surface. Is this to be expected? Can something be done to fix the issues?

Is this something covered by builders warranty?

Appreciate the help.

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chippy · Jul 09, 2020 7:48 pm

It all depends on what we are seeing. If it's a bit of the styrofoam that has broken off during the installation of the pods and then when the concrete has been poured it's floated up but been troweled in its no big deal.
On the other hand if what you can see is actually part of an entire pod that has lifted or has no cover over it then it's a big problem.
Try digging the foam out. If it's just a small bit encased in concrete then it's no big deal and can be patched. If you stick a screwdriver into and it keeps pushing in like you have actually got a whole pod at the surface then you have a big issue and I'd be getting it inspected.

Tallg18 · Jul 09, 2020 8:33 pm

chippy

It all depends on what we are seeing. If it's a bit of the styrofoam that has broken off during the installation of the pods and then when the concrete has been poured it's floated up but been troweled in its no big deal.
On the other hand if what you can see is actually part of an entire pod that has lifted or has no cover over it then it's a big problem.
Try digging the foam out. If it's just a small bit encased in concrete then it's no big deal and can be patched. If you stick a screwdriver into and it keeps pushing in like you have actually got a whole pod at the surface then you have a big issue and I'd be getting it inspected.

Thanks heaps, really appreciate the advice.

Tallg18 · Jul 13, 2020 10:30 pm

Unfortunately, it does seem as though their is a issue. A screw driver did go into the chip a fair way. Pretty shocked. It should be at least 85 - 100mm thick above the waffle shouldn’t it.

chippy · Jul 13, 2020 11:44 pm

Your engineering plans will have the details, but yes typical slab thickness would be 85-100mm.
So the foam was more than just a bit of a chip that could be dug out?
Did it seem like it was the top of a pod?

Tallg18 · Jul 15, 2020 11:24 pm

chippy

Your engineering plans will have the details, but yes typical slab thickness would be 85-100mm.
So the foam was more than just a bit of a chip that could be dug out?
Did it seem like it was the top of a pod?

Builders concreter attended today and investigated the issue. He dug the foam out with wire and both chips were foam the had broken off and floated to the surface. I verified this. Thank god.

Thanks again.