FPSF / Discussions

Do I need to insulate under the footings of a frost protected shallow foundation?

...FPSF in Southern Vermont (AFI 2300). I want to fully insulate the radiant slab by including 4″ XPS under the footings but this seems to conflict with the FPSF p...

Posted by Jon Piana April 15, 2019, 8:45 a.m. Slab on Grade 1 Responses

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

I bet you will find frost under your FPSF in northern Minnesota end of February if you did.. I think your slabs manage frost in hard freeze areas, not preven...

Posted by Mike Kolder Jan. 31, 2021, 2:31 p.m. Slab on Grade 1 Responses

What is the best method of building a slab on grade?

...FPSF., 8 inches Rockwool rigid board under the exterior of the slab, Tpye III EPS foam under footings and a skirt of R8 insulation extending out 4 feet. ARe the...

Posted by Jay Law April 19, 2021, 3:09 p.m. Slab on Grade 1 Responses

For doing an off grid home what is the cost of the slab?

I have an illustration of a top view looking down but still working on a side view but not quite sure on what section and how much reinforcement I would need t...

Posted by Jayperion July 31, 2020, 10:15 p.m. Planning and Design 1 Responses

Can you elevate a slab on grade foundation?

I'm building a home up north in Parry Sound, Ontario next year. I'd like a slab foundation raised three feet above the ground level. I'd like to have a wrap ar...

Posted by Raoul Lions July 27, 2019, 2:47 p.m. Slab on Grade 4 Responses

Can you leave a Legalett slab in winter in Canada without the heat on?

Hi, Planning a home in rural Southern Ontario (Zone 6A). We want heated slab on grade but are concerned about preventing seasonal issues esp winter. Legalett s...

Posted by Gamog Cladhaire April 29, 2021, 9:06 a.m. Slab on Grade 3 Responses

Slab on Grade for House in Grand Rapids MI - Can I get Prefab form kits & Assistance easily?

I am preparing to build a house in Grand Rapids MI and believe a slab on grade foundation is best suited. do you work here or can you supply a kit and assistan...

Posted by Greg Hooks Nov. 20, 2019, 3:35 p.m. Slab on Grade 1 Responses

Is it possible to do a mono pour if you have a covered porch?

Since the concrete slab is insulated, how do you manage to get the covered porch concrete poured at the same time? How does it work for the insulation? The sec...

Posted by Frank Gascon Aug. 10, 2020, 8:05 a.m. Slab on Grade 1 Responses

Is a vapor barrier necessary under a concrete slab with foam insulation and if so, where does go?

We're soon building a slab on grade foundation for our new cabin in Montana and I've decided to sit it on a 4" EPS foam insulation so the slab will retain some...

Posted by Grady 22 Aug. 17, 2019, 12:19 p.m. Air and vapour barriers 3 Responses

Can you help me choose between a slab on grade and pressure treated wood foundation?

Allergic to chemically treated wood, CODE requires PWF on concreted slab before house can be built Where are you building where code says such a thing? I don't...

Posted by Margot Simonot May 20, 2019, midnight Slab on Grade 1 Responses

How well do Legalett slab on grade floor forms work?

We are planning a build for June 2020 in Prince Edward County, Ontario where there is 1 ft of topsoil, 2 ft of clay and then bedrock. Structure planned is a bu...

Posted by Steve Sykes Aug. 18, 2019, 3:21 p.m. Slab on Grade 3 Responses