ᐅ Interior insulation with extruded polystyrene (XPS) in the basement
Created on: 19 May 2015 21:01
H
Hausmeister72
Hello everyone,
a basement room is going to be insulated from the inside.
With the U-value calculation, I came to the following result:
Under these conditions, mold growth should not be expected.
Moisture Protection
During the winter thaw period of 90 days, a total of 0.175 kg of condensation water per square meter occurs in this building component. This amount dries out during the summer within 81 days (drying period according to DIN 4108-3:2014-11).
# Material sd-value Condensation Drying time Weight
m kg/m² % days kg/m²
1 1.5 cm (0.6 inch) Knauf Rotband bonding plaster gypsum 0.08 - 0.0 14.3
2 5 cm (2 inch) XPS rigid foam 4.00 0.15 8.6 1.8
... on outside 0.15
3 1.5 cm (0.6 inch) lime-cement plaster 0.52 0.17 0.6 27.0
... on inside 0.15 70
... on outside 0.023
4 25 cm (10 inch) reinforced concrete (1% reinforcement) 32.50 0.026 0.0 575.0
... on inside 0.023 81
... on outside 0.0024
5 0.3 cm (0.1 inch) bituminous thick coating 150.00 - 0.0 3.2
... on inside 0.0024 42
33.3 cm (13 inch) total building component 187.10 0.18 81 621.2
The calculation from the online tool states: "No mold is to be expected."
However, condensation does occur, which makes me uncertain.
Is this acceptable if constructed as described above?
I do not want to have to tear everything down again...
a basement room is going to be insulated from the inside.
With the U-value calculation, I came to the following result:
Under these conditions, mold growth should not be expected.
Moisture Protection
During the winter thaw period of 90 days, a total of 0.175 kg of condensation water per square meter occurs in this building component. This amount dries out during the summer within 81 days (drying period according to DIN 4108-3:2014-11).
# Material sd-value Condensation Drying time Weight
m kg/m² % days kg/m²
1 1.5 cm (0.6 inch) Knauf Rotband bonding plaster gypsum 0.08 - 0.0 14.3
2 5 cm (2 inch) XPS rigid foam 4.00 0.15 8.6 1.8
... on outside 0.15
3 1.5 cm (0.6 inch) lime-cement plaster 0.52 0.17 0.6 27.0
... on inside 0.15 70
... on outside 0.023
4 25 cm (10 inch) reinforced concrete (1% reinforcement) 32.50 0.026 0.0 575.0
... on inside 0.023 81
... on outside 0.0024
5 0.3 cm (0.1 inch) bituminous thick coating 150.00 - 0.0 3.2
... on inside 0.0024 42
33.3 cm (13 inch) total building component 187.10 0.18 81 621.2
The calculation from the online tool states: "No mold is to be expected."
However, condensation does occur, which makes me uncertain.
Is this acceptable if constructed as described above?
I do not want to have to tear everything down again...
Hello Hausmeister72,
have you already installed your internal insulation? If so, what has been your experience?
Thank you
have you already installed your internal insulation? If so, what has been your experience?
Thank you