Raft slab / Discussions

Could we use a raft slab with ICF walls on a sloped site?

...Raft Slabs – how to build a slab on grade or basement on problem soils A raft slab is engineered to spread the weight of the building evenly over the entire s...

Posted by Paul Fischer Sept. 15, 2020, 2:21 p.m. Slab on Grade 1 Responses

How much for a 1200 square foot house will it cost me to finish the slab

...slab on grade prefab kit? If so, see this page on Legalett Geoslab foundation kits and air heated floors and you can contact them through there. If that's not w...

Posted by Walter Hale Oct. 1, 2020, 7:20 p.m. Slab on Grade 1 Responses

Do you have an engineer directory for slab on grade designers?

...slab, but the one lead I can give you would be Legalett that provides raft slabs across all North America . They deliver all over North America, and their kits ...

Posted by Paul Giusto Dec. 30, 2019, 8:12 a.m. Slab on Grade 1 Responses

Protection from Insects for Legalett Geo-passive super insulated slab on grade?

...slab is the possibility of insects, especially termites and/or carpenter ants infesting the EPS. Is that a danger? Among the many possible ways to protect again...

Posted by James Burns April 30, 2020, 11:11 a.m. Slab on Grade 0 Responses

How do you choose between a basement or slab on grade?

...slab on grade and a basement However, is your lot sloped in a way that creating a flat surface for a slab is a problem? If so, the Legalett prefab slab on gra...

Posted by A. Delmas May 21, 2020, 8:59 p.m. Foundation choices 1 Responses

Can you add a screen/sun room and deck to a slab on grade?

...slab but a company that supplies prefab slab on grade kits (Legalett) can easily provide that, see more here – Slab-on-Grade Raft Foundation Insulation Detail...

Posted by Pierre Contant July 1, 2020, 10:55 a.m. Slab on Grade 2 Responses

How well does the Legalett air heated floor work when pouring concrete?

...Slab on Grade for LEED, Passive, ZNE Legalett monitors the process of installion for their raft slab kits, which includes a pre-pour inspection for warranty, ...

Posted by Israel Sword March 28, 2020, 6:26 a.m. Slab on Grade 1 Responses

Can you elevate a slab on grade foundation?

...raft slab from Legalett . We chose that partly for performance, but also because the house is seated on expansive soils, so a frost wall and footing would have ...

Posted by Raoul Lions July 27, 2019, 2:47 p.m. Slab on Grade 3 Responses

Where would I go for guidance on structural design of footings that sit on top of high-density insulation?

...slab form kit - (see details here)

Posted by Douglas Bennion July 31, 2019, 4:34 p.m. Foundations and Basements 1 Responses

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

...raft slab form kit from Legalett ?

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

Why do you say building on a slab is more ecological than starting with a basement?

...slab-on-grade construction over a basement are undeniable, you can read all the pros and cons here - Slab on Grade or Foundation and Basement; Which is Best? ...

Posted by Geri P Dec. 11, 2017, 11:45 a.m. Foundations and Basements 1 Responses

What should I look for if I want to buy a slab on grade house?

I'm looking to buy a house build on a slab-on-grade . What should I be looking for in terms of insulation? Thanks, Terry Where is the house, and do you know ho...

Posted by terry northcott March 25, 2019, 11:02 a.m. Slab on Grade 1 Responses

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

...slab section, ideally with your hot air radiant heat system, would be about 1000 square feet. There is only one manufacturer of slab on grade form kits with air...

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

What is the best way to build a slab on grade on bedrock?

...slab on grade form kit. You have other option to raft construction.check iso-slab is structural insulated slab kit,cheaper and easiest option to raft kit.

Posted by peter owen Oct. 31, 2019, 3:33 p.m. Slab on Grade 1 Responses

Can you install tubing under a slab on grade foundation to extract heat in winter?

Can tubing for a ground source heat pump be put under a slab on grade prefab form foundation kit to extract winter heat? We generally recommend people check wi...

Posted by Jennifer Cole Aug. 28, 2019, 11:34 a.m. Slab on Grade 1 Responses

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

...slab on grade pour for our 2019 Demo house was an air heated raft slab on grade and had exterior porches as well, we had the slab engineered by Legalett that pr...

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

Does insulating a slab on grade make the building less stable?

...slab. What do you think? A Slab on Grade needs to be built correctly, but no, Insulation under a slab floor will not make it less stable. To me that sounds like...

Posted by Nicolas Jalbert May 28, 2018, 4:56 p.m. Slab on Grade 1 Responses

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

...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 passive solar heat fro...

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