Hi everyone,
I have a 20sqm (215 sq ft) underground garage, with the entrance below ground level but the rest above ground. I want to convert this space into living area.
The floor is a 12cm (5 inch) concrete slab from 1964.
Due to microcracks, some moisture has entered twice so far during periods of high groundwater. The room has also been flooded up to 50cm (20 inches) deep, but with the installation of electric backwater valves with pumps, sewer rehabilitation, and a backwater basin, this hopefully won’t happen again.
There is a floor drain in the room, which results in a 5cm (2 inch) height difference. The floor buildup at the lowest point would be 8cm (3 inches) and only 3cm (1 inch) at the highest point. The build height is limited by the rail system for a sliding door.
My plan so far for the floor buildup is:
Concrete contact layer
Waterproof slurry
Leveling compound
Floating insulation
Floating cork flooring (with small electric underfloor heating foil installed in two spots underneath, so it must remain floating)
A building material manufacturer recommended the following:
Bitumen membrane
Adhered insulation
Concrete screed as leveling layer
OSB boards for weight distribution
Floating cork flooring (alternatively glued, but then with an additional absorbent screed layer on the OSB)
I feel that before proceeding, I should gather more ideas and concerns, since there are obviously many options between a minimal and a full solution.
One more note: A 400kg (880 lbs) heavy fitness machine is to be placed at one spot, where I would have preferred to omit flooring and insulation afterwards due to low ceiling height. This is not easy with the manufacturer’s recommended variant, as the concrete screed would have to be omitted in that sequence.
The floor buildup at the lowest point would be 8cm (3 inches) and at the highest only 3cm (1 inch).
I’m looking forward to any further ideas 🙂
Regards,
maxpd
I have a 20sqm (215 sq ft) underground garage, with the entrance below ground level but the rest above ground. I want to convert this space into living area.
The floor is a 12cm (5 inch) concrete slab from 1964.
Due to microcracks, some moisture has entered twice so far during periods of high groundwater. The room has also been flooded up to 50cm (20 inches) deep, but with the installation of electric backwater valves with pumps, sewer rehabilitation, and a backwater basin, this hopefully won’t happen again.
There is a floor drain in the room, which results in a 5cm (2 inch) height difference. The floor buildup at the lowest point would be 8cm (3 inches) and only 3cm (1 inch) at the highest point. The build height is limited by the rail system for a sliding door.
My plan so far for the floor buildup is:
Concrete contact layer
Waterproof slurry
Leveling compound
Floating insulation
Floating cork flooring (with small electric underfloor heating foil installed in two spots underneath, so it must remain floating)
A building material manufacturer recommended the following:
Bitumen membrane
Adhered insulation
Concrete screed as leveling layer
OSB boards for weight distribution
Floating cork flooring (alternatively glued, but then with an additional absorbent screed layer on the OSB)
I feel that before proceeding, I should gather more ideas and concerns, since there are obviously many options between a minimal and a full solution.
One more note: A 400kg (880 lbs) heavy fitness machine is to be placed at one spot, where I would have preferred to omit flooring and insulation afterwards due to low ceiling height. This is not easy with the manufacturer’s recommended variant, as the concrete screed would have to be omitted in that sequence.
The floor buildup at the lowest point would be 8cm (3 inches) and at the highest only 3cm (1 inch).
I’m looking forward to any further ideas 🙂
Regards,
maxpd
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