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Can you insulate an existing slab on grade floor?
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The Legalett Thermalsill insulated door sill for slab on grade floors is only available with Legalett-designed slabs unfortunately. It is a proprietary design that was created as a solution for Passive House slabs, and I honestly don’t know of any other commercially available product. Sorry about that Shaun!
I'm a little surprised that a solution isn't available as this must be a common issue for those trying to build to passive house or net zero standards. Are there any readers out there that have any insight that might help me? I know there was a product by Compacfoam, but this doesn't seem available in my area. Seems like a relatively easy solution. Perhaps a product from Nexcem/Durisol?
Thanks