Choosing the Right Type of Foundation

Slab vs. vide sanitaire? Discussion here along with info on how to layer with the moisture barrier and insulation.

Some other useful articles here:

Tips from these pages:

  • Dig out the earth and then pack it tightly before pouring any concrete.
  • You can – if you’re crazy enough – do this without using any rebar (as if!)
  • You can literally make it up as you go along. These guys used rockwool under the slab and EPS under the footings. How does that not compress when under concrete and with the weight of the house on it. 
  • It IS important to use a Radon/vapour barrier before pour cement.
  • Remember to put the rebar over the vapour barrier!
  • Polished concrete is a good idea – but who is capable of doing this here in France?

The plate washer/ straps (seismic regions)

” The plate washer must be a minimum 3 x 3 x 0.229 inches (3 gauge) and extend to within ½-inch of the sheathed edge of the sill plate.”

Further information of strapping the wood frame to the foundation can be found here:

Information about straps

Seismic concrete to wood

Anchor bolts general

Foundation cement

Just asking for some very rough quotes for the cost of cement at

Assuming we have a depth of 60cm (this is only guess work at the moment), we have an external wall footprint of 8m x 10m

Assuming the concrete base major support area is 1m deep (it will be less that this).

That gives us (for a 1 metre depth)

8 m cubed+ 8m cubed+ 9m cubed+ 9m cubed.

= 34 metres cubed of cement for 1 m depth.

So for 0.6 metres depth we need 20.4 m cubed. I filled out the form on the above site as below so am waiting quotes.

Foundation types and construction

Information on types of foundation & construction

3 main types of foundation

Slabe on grade videos

Stego wrap featured in this video is $454.50 per roll. A roll is 14ft  x 210ft. This is 4.26m x 64m. So for a 7m x 9m home 1 roll would do it.

Appears to be what I’m after, but why not fill with stones to lower cement costs?

Insulated slab

Insulating beneath a concrete slab

Leyroy Merlin information on foundations

Good how to foundation link