Legalett slab on grade / Discussions

...Legalett slab on grade radiant air system powered by a gas boiler and an electric Mitsubishi heat pump system. With gas prices so high in Ontario, we want to run our Mitsubishi heat pump for as long as we can before turning on the Legalett system. The Mitsubishi is easily keeping the air temp in the house between 15C a...

...on for a floating slab. The ~4' foundation walls sit on footings.Is it better to insulate on the inside or outside of the foundation walls, or both inside and outside? I’m wondering why you are going with a 4-foot-deep frost wall for a slab on grade. There are much cheaper and easier ways to build a frost protected sha...

...on. I've been looking at the 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 pr...

...one is better than the other, all forms of under floor heating have pros and cons. It really depends on whether its a new build or a renovation, and how much of the floor you are going to do. For a bathroom only in a renovation for example, adding a heated floor matt is the most convenient and sensible option. But for ...

...ons to build our new home.  We have chosen to build the house on a slab on grade foundation. My builder was suggesting that we at least start with the foundation in the fall and then start work back up again in the spring. This may be okay when installing a full basement foundation, but can a slab foundation hold up in...