Pre-existing foundation not meeting required frost depth
Pre-existing foundation not meeting required frost depth
(OP)
The foundation is fine for additional load, but we will have to somehow "get" the frost depth (18" more). Any way to achieve this without physically adding depth - for example, any way to insulate to an equivalent modified depth?






RE: Pre-existing foundation not meeting required frost depth
2) My understanding is that the frost depth requirement only applies to the perimeter. Therefore, if you protect the perimeter from frost to the required depth in some manner, the interior footings should be fine.
RE: Pre-existing foundation not meeting required frost depth
RE: Pre-existing foundation not meeting required frost depth
The insulation must extend far enough so that the shortest path for frost to reach the underside of footing is equivalent to the required depth of footing.
BA