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Wooden floor + underfloor heating in existing and extended basement
During the winter, we are planning to expand our house with a basement, and I'm currently trying to figure out how to handle the flooring.
Conditions:
* The current house was built around 1960. One-story house with a basement.
* The expansion will consist of a basement + ground floor.
* The expanded basement will be properly built with insulation, capillary-breaking layer, modern drainage, etc.
Preferences:
* Priority 1: Underfloor heating with wooden flooring in the new basement.
* Priority 2: Underfloor heating with wooden flooring in at least parts of the old basement.
* Priority 3: We have an acceptable ceiling height in the basement but would love to have about 5cm more to make it a bit airier.
Observations:
* Avoid laying wooden floors directly on the basement floor as it absorbs moisture.
* Avoid underfloor heating in a basement without insulation as it can cause reverse moisture migration problems.
Questions:
* In a modern-built basement, is it OK to embed underfloor heating and then lay wooden flooring directly on top? Or is some type of ventilated floor needed?
* In the old basement, would it be possible to chip away, say, 10cm of the floor and build up a ventilated floor with underfloor heating, where the underfloor heating is placed directly under the wooden floor? That is, you get a ventilated air gap between the concrete slab and the underfloor heating.
Conditions:
* The current house was built around 1960. One-story house with a basement.
* The expansion will consist of a basement + ground floor.
* The expanded basement will be properly built with insulation, capillary-breaking layer, modern drainage, etc.
Preferences:
* Priority 1: Underfloor heating with wooden flooring in the new basement.
* Priority 2: Underfloor heating with wooden flooring in at least parts of the old basement.
* Priority 3: We have an acceptable ceiling height in the basement but would love to have about 5cm more to make it a bit airier.
Observations:
* Avoid laying wooden floors directly on the basement floor as it absorbs moisture.
* Avoid underfloor heating in a basement without insulation as it can cause reverse moisture migration problems.
Questions:
* In a modern-built basement, is it OK to embed underfloor heating and then lay wooden flooring directly on top? Or is some type of ventilated floor needed?
* In the old basement, would it be possible to chip away, say, 10cm of the floor and build up a ventilated floor with underfloor heating, where the underfloor heating is placed directly under the wooden floor? That is, you get a ventilated air gap between the concrete slab and the underfloor heating.
I'll try again!
I plan to extend with a new basement and want wooden floors in the new rooms. As I see it, I have two options:
(1) Embed underfloor heating pipes directly into the concrete slab and lay wooden flooring on top, cast the concrete slab so that it is 2-3 centimeters lower than the desired final floor height.
(2) Cast the concrete slab so that it is a couple of decimeters(?) lower than the desired final floor height. Build up with a ventilated floor, then a suitable amount of insulation, then underfloor heating, then wooden flooring. If you go with this option, how much insulation would be reasonable to have between the underfloor heating and the "ventilation gap" that will be between the concrete slab and the underside of the insulation? There will be a couple of decimeters of insulation under the concrete slab so I'm thinking it's mainly about limiting the heat transfer between the air used to ventilate the floor (should be around 20 degrees since it's indoor air) and the water loops (around 40?).
The question is, what is needed when building a new basement? If it was an old basement, it would be option 2 due to moisture, but I don't know if you face the same problem when building new with insulated and capillary-breaking under the slab? Anyone with experience or guesses?
I plan to extend with a new basement and want wooden floors in the new rooms. As I see it, I have two options:
(1) Embed underfloor heating pipes directly into the concrete slab and lay wooden flooring on top, cast the concrete slab so that it is 2-3 centimeters lower than the desired final floor height.
(2) Cast the concrete slab so that it is a couple of decimeters(?) lower than the desired final floor height. Build up with a ventilated floor, then a suitable amount of insulation, then underfloor heating, then wooden flooring. If you go with this option, how much insulation would be reasonable to have between the underfloor heating and the "ventilation gap" that will be between the concrete slab and the underside of the insulation? There will be a couple of decimeters of insulation under the concrete slab so I'm thinking it's mainly about limiting the heat transfer between the air used to ventilate the floor (should be around 20 degrees since it's indoor air) and the water loops (around 40?).
The question is, what is needed when building a new basement? If it was an old basement, it would be option 2 due to moisture, but I don't know if you face the same problem when building new with insulated and capillary-breaking under the slab? Anyone with experience or guesses?
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