Hello,
I didn’t find anything in the search. My architect initially planned to use cellular glass gravel under the slab-on-grade (without a basement) on strip foundations. However, he now suggests that, for cost reasons, this could be omitted and instead the insulation installed below the screed, since the clay soil beneath shouldn’t freeze in winter.
This would save me about 5,000 euros (approximately $5,000). From his perspective, this is acceptable, but he asked me if I think it’s okay. I’ve been researching for two days now but haven’t found any useful information.
What do you think?
I didn’t find anything in the search. My architect initially planned to use cellular glass gravel under the slab-on-grade (without a basement) on strip foundations. However, he now suggests that, for cost reasons, this could be omitted and instead the insulation installed below the screed, since the clay soil beneath shouldn’t freeze in winter.
This would save me about 5,000 euros (approximately $5,000). From his perspective, this is acceptable, but he asked me if I think it’s okay. I’ve been researching for two days now but haven’t found any useful information.
What do you think?
B
Bau.Micha31 Mar 2016 21:20Hello,
I have foam glass gravel underneath my slab foundation.
I have experience with this type of gravel from constructing an industrial hall.
My garage can be driven on with heavy machinery,
but you can’t really feel any warmth from the floor.
I have foam glass gravel underneath my slab foundation.
I have experience with this type of gravel from constructing an industrial hall.
My garage can be driven on with heavy machinery,
but you can’t really feel any warmth from the floor.
S
SimonMoers10 Apr 2016 16:32I also chose foam glass gravel. It is logical that the insulation under the foundation slab is more effective. It surrounds the house extending 1 meter (3 feet) beyond the exterior walls. This way, the walls are protected from rising moisture from the ground. You can still insulate above the slab later if needed, or choose not to. But I will never be able to access under the house again. The small additional cost compared to the whole house is negligible in my opinion.
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