pheller said:I'm not sure radiant designers would agree with you here, Paul.
https://www.finehomebuilding.com/2014/07/09/insulating-a-slab-on-grade
He's right.
The ground is always around 55 or so and is much greater mass than your slab.
What I did on my house is punch post holes thru out it and insulate the outside. It's always the same temperature every day. I believe I'm in zone 5 too
As for sheet insulation on the garage wall, insulation is basically either 0 percent or 100 percent. Gaps and such make it 0 insulated.
I know someone who tried to save money by insulating every other bay in his house, guess how that went?
Antihero (Forum Supporter) said:What I did on my house is punch post holes thru out it and insulate the outside. It's always the same temperature every day. I believe I'm in zone 5 too
What do you mean "punch post holes thru out it"?
I know I can insulate the outside. I had already planned on doing that.
OHSCrifle said:If you lay new loops on top of the existing slab you're going to spend a bunch of money and will still lose heat into the non insulated slab.
Can you post a photo of the exterior wall from outside? I suspect your slab edge needs some exterior insulation + stucco a lot more than your stud walls need more insulation.
You are correct. My exterior slab is not insulated.
Although I will say this much - this bathroom that gets very cold, it's got the least amount of exposed outside slab of an area of the house.
My daughters bedroom also gets very cold, but it's got 4'x12' of exposed outside slab wall.
pheller said:Antihero (Forum Supporter) said:What I did on my house is punch post holes thru out it and insulate the outside. It's always the same temperature every day. I believe I'm in zone 5 too
What do you mean "punch post holes thru out it"?
I know I can insulate the outside. I had already planned on doing that.
When I poured the concrete I put a bunch of post holes down 2 feet or more thruout the slab. It helps keep the slab a more constant temp. Also strengthens it to a certain extent.
pheller said:OHSCrifle said:If you lay new loops on top of the existing slab you're going to spend a bunch of money and will still lose heat into the non insulated slab.
Can you post a photo of the exterior wall from outside? I suspect your slab edge needs some exterior insulation + stucco a lot more than your stud walls need more insulation.
You are correct. My exterior slab is not insulated.
Although I will say this much - this bathroom that gets very cold, it's got the least amount of exposed outside slab of an area of the house.
My daughters bedroom also gets very cold, but it's got 4'x12' of exposed outside slab wall.
I would try insulation first. Then maybe add Schluter Ditra Heat under some porcelain tiles in your bathroom. Electric in floor heat for small (or large if you like to spend money) spaces.
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