Raft slab / Discussions

...slab and new part of the garage to 40 ft Not sure if this can be done as it would technically be 2 seperate slabs (connected or touching) with 1 building on both slabs? There should be no reason that you couldn't attach a new slab on grade foundation to an existing slab provided the existing slab is not showing signs o...

...raft slab can be built on any soil that an edge-loaded footing foundation can be built on, but not the other way around. A Raft slab spreads the weight evenly over the whole surface which greatly reduces the risk of heave, uneven settling, and slabs cracking. You need to be sure (and your engineer needs to confirm) tha...

...Slab Foundation: This concrete floor is not intended as a structural slab foundation. Should I directly design it as a traditional slab foundation? In this case, the thickness would be around 4-to-6 inches. Floor Sandwich Structure: I'd like to understand how the layers of the floor system should be structured for this...

...Slab on Grade foundation. Reinforced concrete perimeter footings approximately 12" x 40" deep, and a 4" thick concrete slab on top of 2" rigid insulation. This will be a monolithic pour. The top of slab will be approx 12" above the soil. I plan to isulate the outside face of the perimeter footings with 2" rigid foam bo...

...slab still be in tact? What happens if the slab cracks and part of the house tilts? Here you have lots of old houses on basements that are still standing. With a basements you can redo basement walls, easily get to plumbing etc. With a slab what happens when a pipe breaks in the slab? How can you even find leaks? What ...

...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.  

...slab EPS foam insulation is nothing compared to the labor required to switch to an entirely different method of insulating. I would first point you to this page -  Slab on grade technical guide We have other pages on slab construction as well that are worth looking at, you can find them if you enter slab on grade in th...

...slab on grade install video here. Really all you have to do is tell the company what you want and they take care of the rest. This is different than engaging an individual designer or engineer to build a one-off slab, slabs are their specialty and they’ve been at it for decades. I’d have no concern whatsoever with fros...

...slab will heave, crack, etc.  Also, do you have a list of foundation contractors who have experience with building these slabs? Having built several LEED certified High performance homes on slabs with different methods, our preferred method on how to build a slab on grade would be with an engineered prefab raft slab ki...

...slab, or do you have something like this without the heated floors that would work better? A 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 P...

...slab w/ 2" hard foam insulation under slab (+ crushed stone & eps vapor barrier), and 2" hard foam insulation vertically around sides/edges of slab and subfloor above.  On top of the slab will be a wood subfloor web-truss system where the electric & plumbing & hydronic floor heating panels w/ PEX tubing wil...

...slab on grade instead, which is more efficient, more valuable, and likely competitively priced compared to a home built on piers if you consider the added insulation you’ll need due to letting air flow underneath. Here is a slab on grade with no footing that is great for building on problem soils, it may be a solution ...

...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.

...slab on grade foundation, so to speak. We live in a high ranch, with the front door cut into the existing foundation, so the idea would be to bring the foundation to "level" (tying in door, window spaces)  and then having a slab at that height, which would put us well above water. Of course this would need to be engine...

...slab on grade so that there is no shifting with frost. Is this not the case anymore. Is a slab on grade the best practice? An engineered slab on grade that has been designed for it's climate is as reliable at preventing frost heave as a foundation and footing. We are creatures of habit, and we have always *known* that ...

...raft slab as well. Legalett is an independent company, we just feature it here as we do other systems that we like, and so far we have not found any other company that does infloor heating with air tubes such as this. But there are a lot of advantages, you can see here on our page comparing the advantages of air heated...

...slab on grade home is probably about the same. Unless it was built by someone that was an early pioneer of green building in a sense, which is possible, because slab on grade homes in the north weren’t very common 50 years, so if someone built one then maybe they were ahead of their time. So it may be well-insulated by...

...slab. You could also pour a raft slab frost protected shallow foundation as seen in this video, all you would need to do for that would be strip the 6 inches of organic matter, lay a 6 inch bed or clean stone and then your slab on grade form kit.