Frost line / Discussions

...frost heave, and given that frost forms on a 45 degree angle from the surface, that skirt can have as little as a 2% slope all the way up to being completely vertical. All that matters is that it slopes away from the house so that any standing water drains away from the slab and not towards it.

...frost walls is to get below the frost line, and you can accomplish the same thing a lot easier and cheaper by just doing a slab on grade with a perimeter skirt of insulation. Laying a footing and stem wall to get below the frost line is a building technique that dates back to a time before the advent of insulation, whe...