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

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

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

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

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

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

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

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

Are slab on grade foundations cheaper than a basement?

...slab on grade over a basement almost every time, and in most cases yes, a slab is cheaper in our experience. But that is partly due to the way we build, where w...

Posted by Jason Nov. 21, 2019, 4:12 p.m. New foundations and slab-on-grade 1 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

What is the best way to stop thermal bridging between my ICF walls and my footing?

...raft slab first, then build ICF walls on top . See the Geo-Slab frost protected slab on grade by Legalett for more information. Legalett slab on grade form ki...

Posted by Walter van den Broek Sept. 18, 2020, 11:23 a.m. Foundation choices 1 Responses

Can you install a slab on grade foundation in the Fall and leave it over winter?

...raft slabs here , I know they supply slab kits across North America. And, our slab was built in Quebec, a little chillier than Boston so you should be good if y...

Posted by Matthew Gioia Sept. 21, 2020, 9:15 p.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

What Should You Look For When Buying a Slab on Grade Home?

...Slab on Grade or Foundation and Basement; Which is Best? Reading that page will give you a better idea of what to look for in a slab. And the first question i...

Posted by Mike Molloy Nov. 6, 2019, 7:29 p.m. Slab on Grade 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

Are there any updates on the progress of the second demonstration house?

...slab on grade kit here as well as the radiant tubing. Thanks for the reply. I noticed this new demo house is 2 stories. Is the Legalett system also supplying ra...

Posted by dean c April 30, 2019, 7:58 p.m. Solar thermal collectors 2 Responses