Insulation values
Regarding the measures for insulation for the wall, roof and floor the specifications are found below.
In the Sustainability API the input regarding insulation concerns the qualitative indication of the insulation thickness (none, moderate, good, very good). This input is converted to input for the different methods.
Input to API
Construction year
Input energylabel
0 (no insulation)
till 1991
no post insulation
from 1992
not possible
1 ( mediocre insulation)
till 1964
1965-1974 roof
no post insulation
1965-1974 wall and floor
post insulation
1975-1991
no post insulation
from 1992
not needed
2 (good insulation)
till 1991
post insulation
from 1992
not needed
3 (very good insulation)
till 1991
extreme post insulation
from 1992
extreme post insulation
With moderate insulation, the starting point is that the resulting Rc value at the energy label is conservative compared to the Rc value at the EI. This means that in a number of cases is chosen for "not post-insulated". A specific Rc value is used for the EI, BENG and consumption. This depends on the insulation thickness. We assume a certain insulation thickness, which depends on the year of construction. The lambda value of insulation is 0.045 W / mK (with the EI, BENG and consumption). The basic resistance (from the non-insulating layers) is 0.15 m 2 K/W for floors, 0.36 m 2 K/W for facades and 0.22 m2 K/W for roofs.
No insulation and moderate insulation is not possible with more recent years. In those cases it says ‘NA’ the table.
Rc with 'no insulation'
Construction year
Thickness (cm)
Roof
Floor
Wall
till 1987
0
0,22
0,15
0,36
1988 - till present
NA
NA
NA
NA
Values in Rc (m2 K/w)
Rc with 'mediocre insulation'
Construction year
Thickness R/F
Thickness W (cm)
Roof
Floor
Wall
till 1974
3
5
0,89
0,82
1,47
1975 - 1987
5
7
1,33
1,26
1,92
1988 - 1999
5
5
1,33
1,26
1,47
2000 till present
Na
NA
NA
NA
1,47NA
Values in Rc (m2 K/w)
Rc with 'good insulation'
Construction year
Thickness (cm)
Roof
Floor
Wall
till 1974
8
2,00
1,93
2,14
from 1975
10
2,44
2,37
2,58
Values in Rc (m2 K/w)
Rc with 'very good insulation'
Construction year
Roof thickness
Rc
Floor thickness
Rc
Wall thickness
Rc
all
17
4,00
15
3,5
16
4,00
Values in Rc (m2 K/w), thickness in cm
The Rc values ​​at level "very good" are in accordance with the advice of Milieu Centraal.
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