Hello,
I'm working on an extension of an old deck.
If you take a look at the picture I've attached, I have some questions about how to do the ceiling on the ground floor.
I'm thinking I might need some vapor barrier cloth against the concrete to be able to insulate against the slab?
Then I'll use metal studs which I'll then set framing and sheet material in, does this work?
I'm also a bit worried about the cold from outside since the concrete slab sticks out under the sloped roof.
It's going to be warm inside, and when it gets very cold outside, condensation will form. Should I be worried about this?
The slab is completely protected from water, though.
Right or wrong?
Appreciative of all the answers!
I'm working on an extension of an old deck.
If you take a look at the picture I've attached, I have some questions about how to do the ceiling on the ground floor.
I'm thinking I might need some vapor barrier cloth against the concrete to be able to insulate against the slab?
Then I'll use metal studs which I'll then set framing and sheet material in, does this work?
I'm also a bit worried about the cold from outside since the concrete slab sticks out under the sloped roof.
It's going to be warm inside, and when it gets very cold outside, condensation will form. Should I be worried about this?
The slab is completely protected from water, though.
Right or wrong?
Appreciative of all the answers!
Not keeping up with what you are going to do? Is it a previous patio you are going to enclose? How did the concrete vault get there?
What do the surrounding constructions look like? With only 100mm insulation and underfloor heating, you risk reverse moisture migration, which in the worst-case scenario could cause you problems outside the area.
What do the surrounding constructions look like? With only 100mm insulation and underfloor heating, you risk reverse moisture migration, which in the worst-case scenario could cause you problems outside the area.
I'm going to enclose the slab and wonder how I should go about avoiding condensation.mexitegel said:
It's specifically the ceiling that I'm thinking about. This is because the slab/plate protrudes and becomes cold.
It was a deck and I will enclose it as drawn above.
The slab is cast in place and supported by concrete pillars (not shown in the drawing).
The old concrete foundation I've drawn is actually gravel. I could have dug out another 100mm to get 200mm EPS?
Then you should definitely dig out the gravel and lay at least 200mm to avoid problems and significantly reduce heat loss downward 👍.
I'm uncertain about the concrete ceiling; it's a substantial cold bridge you have there. The best option might be to insulate with foam plastic at the "eaves" to break it. Otherwise, you might need to think like you do with a basement wall that's insulated from the inside, i.e., that it's ventilated.
What's above? What type of room do you want to build there now?
I'm uncertain about the concrete ceiling; it's a substantial cold bridge you have there. The best option might be to insulate with foam plastic at the "eaves" to break it. Otherwise, you might need to think like you do with a basement wall that's insulated from the inside, i.e., that it's ventilated.
What's above? What type of room do you want to build there now?
Then I'll dig out more.
I was considering foam plastic, about 40mm?
(20mm in 2 layers) that I glue to the concrete ceiling.
The reason I want to insulate the ceiling is to prevent the heat from dissipating into the concrete?
Down there will be a hall and upstairs an office.
Most of the heat rises upwards where the residential space is, right? What I'm wondering is if there's a risk of condensation forming closest to the outer wall in the concrete ceiling, but maybe it's not such a big risk when I think about it. But I can't answer with certainty.
You need to insulate the floor structure externally!G gevsan said: