Legalett slab / Discussions

Can I use thermal evacuated tubing with a Legalett radiant air system in a raft slab?

...Legalett system with either a thermal solar panel or thermal tubing.  I need advice and a better idea of what your services are.  I watched a video with Mike Reynolds from your company.  I have a few structural questions about the raft slab as well. Legalett is an independent company, we just feature it here as we do o...

Posted by kathryn saunders Jan. 20, 2023 Renewable energy 1 response

Would a Legalett in slab radiant heat system be better than a heat pump?

...Legalett engineer a raft slab foundation for our new build. My question is regarding also installing their in slab radiant air heating system instead of a ducted heat pump for the heating needs of our home. The plan is to have a well insulated and air tight envelope...would the Legalett heating system be worth the cost...

Posted by dean c Jan. 20, 2023 Delivery: radiant, forced-air and decentralized 1 response

We are looking to build a slab on grade, do we need radiant heat?

...slab on grade addition and were wondering wether it was necessary to install in floor radiant heat. We received a quote from Legalett for their geo slab it seemed more than we were hoping, is hydronic in floor more cost effective? Also, if we heated the space with a mini split heat pump and insulated beneath the slab w...

Posted by Scott Self Sept. 21, 2020 Delivery: radiant, forced-air and decentralized 2 responses

How long into winter can we run our Heat Pump with our Legalett System

...Legalett system or does Legalett system have to be turned on and warming the slab as well? This is a good idea, as heat pumps can be up to 3 times more efficient that other heat sources. We consulted with a Legalett engineer to be sure, and they would like you to run your Legalett air-heated floor system at least a bit...

Posted by J Bergley Dec. 20, 2021 Delivery: radiant, forced-air and decentralized 3 responses

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

...slab this slab it really needs an experienced engineer, so I would check with your engineer that this is within their wheelhouse, if not I would look into a company that specializes in providing engineered slab on grade prefab kits where point loads are all considered and engineered for you, as well as skirting.  

Posted by Earl Williams Nov. 30, 2021 Slab on Grade 3 responses

Can I do a concrete deck with pilings from Legalett?

...Legalett frost protected slab on grade could be the solution for your project. What you propose could work, but depending on the size of the building, the easiest way to proceed really would be with an integrated retainer wall near the edge of the slope and cantilever the rest of the slab beyond that. Are you dead set ...

Posted by Pam Proctor Nov. 15, 2021 New foundations and slab-on-grade 1 response

What is the best heating system for new home build?

...slab on grade with frost wall – an alternative to explore is a raft slab frost protected shallow foundation with air heated radiant floors, that is what we built in our recent LEED Platinum demonstration home. They can be heated with gas or electricity; we of course chose electricity. An option with that could be to us...

Posted by Maureen Thompson Oct. 28, 2021 Heating and cooling 5 responses

How to you build a raft slab foundation?

...Legalett raft slab on grade kits but I don't think they provide advice on grading. Any advice would be appreciated - and also where to find a good engineer - there seem to be a lot of cowboy contractors out there!  A raft slab is different than standard slab on grade construction, and it pretty much by definition needs...

Posted by Kate Bottriell Aug. 19, 2021 Slab on Grade 1 response

Can I use a Legalett slab in Florida if I don't want floor heat?

...Legalett raft slab has an optional air heated radiant floor, but it is not necessary. They are installed in all climates from the far north to the south, and even in cold climates they don’t always include floor heating. Many Passive House home builds that use a Legalett insulated slab base don’t install heating system...

Posted by Harry Dickinson March 25, 2021 Slab on Grade 1 response

What is the minimum insulation value for insulation between the edge of the slab and foundation wall?

...slab foundations and homes, I would first check our BC Step Code made easy page for information on that. Building codes vary too much between states, provinces and even cities for us to keep up with unfortunately.

Posted by Arsh Deep July 12, 2022 Slab on Grade 1 response