Skirt insulation / Discussions

What are the best below grade drainage layers for a slab on grade foundation?

...skirt insulation for cold climates is essential to prevent 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...

Posted by stephan prystanski April 7, 2025 Slab on Grade 1 response

How do you insulate a basement slab to keep the benefits of thermal mass in a passive solar home?

...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, where dirt was the insulator. Now insulation can be the insulator.

Posted by Trudy Lynn Oct. 25, 2024 Passive solar home design 1 response

Have you excavated under one of your slabs middle of winter?

...insulation, and whether or not it is heated, and factoring that with regional climate data, it is very easy to design a slab so it will not freeze. You just need the right amount of skirting.  You can read more here about frost heave  -  All About Frost Heave Prevention in Cold Climates Our last slab was built on a Leg...

Posted by Mike Kolder Jan. 31, 2021 Slab on Grade 1 response

What is the ground temperature 4 feet down in Sudbury, Ontario?

Hi, how can I know the lowest ground temp in the Sudbury latitude up as far as temiskaming latitude? Ideally at various depths. Thanks for being there, Paul

Posted by Paul Bullock Oct. 8, 2020 Concept and design