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geiserp-123 Jan 2017 13:11Hello everyone
Over the past few years, I have converted a wooden carport. It was fully boarded with wood, and I insulated the ceiling with 60mm (2.4 inches) PUR XLS foam. I also installed an electric gate.
Purpose and background: I am an enthusiastic car mechanic and need a warm garage. The trade-off is that I have to dehumidify it, which I do and don’t find bothersome.
The floor consists of 20x20cm (8x8 inches) drainage stones, covered with a rubber mat, and then cardboard on top. Below the drainage stones is about 10cm (4 inches) of gravel, and beneath that is just plain soil.
Heating works. However, I have noticed that most of the heat is lost through the floor. While the infrared thermometer shows relatively good results at the walls, the floor temperature only reaches about 5-7°C (41-45°F) with an indoor temperature of 20°C (68°F).
I want to insulate the floor in spring as well. Question: Remove the drainage stones, remove the gravel, install 40mm (1.6 inches) PUR boards, then add gravel and drainage stones again.
Will this work, or is it a bad idea?
Regards, Philipp
Over the past few years, I have converted a wooden carport. It was fully boarded with wood, and I insulated the ceiling with 60mm (2.4 inches) PUR XLS foam. I also installed an electric gate.
Purpose and background: I am an enthusiastic car mechanic and need a warm garage. The trade-off is that I have to dehumidify it, which I do and don’t find bothersome.
The floor consists of 20x20cm (8x8 inches) drainage stones, covered with a rubber mat, and then cardboard on top. Below the drainage stones is about 10cm (4 inches) of gravel, and beneath that is just plain soil.
Heating works. However, I have noticed that most of the heat is lost through the floor. While the infrared thermometer shows relatively good results at the walls, the floor temperature only reaches about 5-7°C (41-45°F) with an indoor temperature of 20°C (68°F).
I want to insulate the floor in spring as well. Question: Remove the drainage stones, remove the gravel, install 40mm (1.6 inches) PUR boards, then add gravel and drainage stones again.
Will this work, or is it a bad idea?
Regards, Philipp
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MODERATOR23 Jan 2017 19:00The technical specifications of XPS insulation allow for a pressure of 30t/m² (30 tons per square meter). However, since you plan to lay drain stones, the pressure per stone would be much higher (I haven’t calculated this exactly, but with the same load, pressure increases significantly as the loaded area decreases). Technically and physically, the drain stones do not form a load-distributing surface but rather small individual contact areas per stone.
If you were to have a concrete slab poured, your idea could be implemented more effectively, as this would provide a load-distributing surface.
My suggestion: Consult with a manufacturer of XPS insulation materials. This can be done by phone, and sometimes a consultant can visit the site – which would be the safest option.
If you were to have a concrete slab poured, your idea could be implemented more effectively, as this would provide a load-distributing surface.
My suggestion: Consult with a manufacturer of XPS insulation materials. This can be done by phone, and sometimes a consultant can visit the site – which would be the safest option.
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