Hello!
I am cutting in water and sewer pipes into an existing concrete slab on the ground. Originally, there are 20 cm of EPS foam as insulation under the slab, but at the beginning of the trench, the EPS has disappeared when I dug up for the pipes (see image). And along the rest of the stretch, the insulation also becomes thinner.
My question is:
What should I fill around the pipes with to both restore the insulation value and at the same time create a stable base for recasting the slab? Is there a material that both insulates well and can withstand the pressure from a cast slab on top? And how thick should I cast?
Grateful for tips and experiences!
Best regards,
Karl
I am cutting in water and sewer pipes into an existing concrete slab on the ground. Originally, there are 20 cm of EPS foam as insulation under the slab, but at the beginning of the trench, the EPS has disappeared when I dug up for the pipes (see image). And along the rest of the stretch, the insulation also becomes thinner.
My question is:
What should I fill around the pipes with to both restore the insulation value and at the same time create a stable base for recasting the slab? Is there a material that both insulates well and can withstand the pressure from a cast slab on top? And how thick should I cast?
Grateful for tips and experiences!
Best regards,
Karl
