Required insulation thickness according to Grade Building envelope | Thickness (mm) | |||||
A | B | C | D | |||
Exterior wall | Adjacent to outside directly | 85 | 100 | 115 | 130 | |
Adjacent to outside indirectly | 60 | 70 | 80 | 90 | ||
Floor of the lowest floor | Adjacent to outside directly | Floor heating | 105 | 125 | 140 | 160 |
No floor heating | 75 | 90 | 100 | 115 | ||
Adjacent to outside indirectly | Floor heating | 70 | 80 | 90 | 105 | |
No floor heating | 50 | 55 | 65 | 70 | ||
Roof | Adjacent to outside directly | 160 | 190 | 215 | 245 | |
Adjacent to outside indirectly | 105 | 125 | 145 | 160 | ||
Sidewall of apartment building | 120 | 140 | 160 | 175 | ||
Floor between levels | Floor heating | 30 | 35 | 45 | 50 | |
Other | 20 | 25 | 25 | 30 |