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RE: [Strawbale] comparing insulation materials
Title: comparing insulation materials
Thank
you Herbert, excellent material, any detailed source for conventional systems?
Thanks to Rene also. I persume gradually we will be able to compare
different systems. Anyone with more of such treasures?
Best
wishes, Martin
Dear Martin, dear balers
I
tried to send this email to the GSBN-list, but I dont know, if I am still
listed, because it came back.
So I do it this way, maybe its interesting
for the European list too.
Responding to your idea to compare common
building-products (insulation),
here is our calculation based on
*
prices from local building-markets
* declarations and tests from
insulation-manufacturers
* the values, Holger König (a well known
Baubiologist in Germany) describes in his books (e.g. "Das Dachgeschoß",
Ökobuch-Verlag)
* added by the calculations concerning production energy
with the help of Gerd Zwieners book "Ökologisches Baustoff-Lexikon"
(C.F.Müller).
(European) terms:
You know: Lambda L= W/mK describes
the amount of warmth going through a 1m thick material in 1 second per
squaremeter, when the temp-difference is 1°K (=1°C); the lower L is, the
better the insulation-capacity. L depends and differs with the amount of
waterdamp, which is in the material, so each organic material has to have a
20% addiction to
LRTr10 (new after CEN = LNTr10): insulation value (Lambda)
for a dry (tr) material at a temperature of 10°C (for 1m, so L never depends
on thickness of wall)
k-value (new after CEN: U-value): k= W/m2K
(Wärmedurchgangskoeffizient, dont know the english word), depends on the
thickness of the wall
PEI: amount of energy to manufacture/transport/.. a
matarial
1) comparison of values
material
L
LRtr10
raw-weight
included
prod-energy
(W/m2K)
kg/m3
(PEI:
kWh/m3)
strawbales 0,045 0,038
100
5-30
(as
proved in our official tests in Austria)
cellulose
0,045 0,038
35-70
110-190
(made
from 80% newspaper)
EPS-W15 0,038
0,038
15-30
400-1.050
(polystyrol-plates:
XPS or EPS)
XPS
0,020-0,035
15-30
400-1.050
fibreglass
0,038 0,038
100
100-500
reed
0,045-55 0,039-45
225
?
(maybe same as SB)
(depending
on the amount of wire to hold it together)
flax-mat
0,045 0,038
150
?
(prob. 30-50)
(Heraflax)
cork-plates 0,045
0,038
80
?
low, but long
(heat-expanded
cork)
transport-ways
cocos-mats
0,045-51 0,038-42
50-125
95
sheep-wool
0,045 0,038
100
5-50
depends on
(Daemwool, washed and impregnated with Mitin)
transport to
wash
Conclusion: energy-amortization-times of
insulation-materials:
strawbale, reed, cellulose: 0-1 month
cork,
sheep-wool: -2 month (depending on transport-distances to manufacture/wash the
material)
cocos-plates: 2-3 month
fibreglass (mineral- or stonewool): 8
month
polystyrol (EPS/XPS): 13- month
polyurethan (PU): 17-18 month
(this is the ugly thing people spray between window- and
doorspaces)
2) insulation-price per squaremeter and for 150m2
low-energy house (150m2 living space means ca. 400 m2 wall and roof), all
prices in EURO
The following values are necessary to guarantee a wall with
U = 0,15 W/m2K (standard for well-insulated low-energy-houses in
Europe)
material LRTr10 thickness
of wall price/m2 for 150m2
strawbales
0,045 30 cm
3,6
1.453,
cellulose 0,045
30 cm
18,3
7.326,
EPS-W15
0,038
24 cm
20,3
8.139,
fibreglass
0,038 24 cm
23,5
9.419,
reed
0,045
30 cm
25,6
10.232,
flax-mat
0,045
30 cm
51,
20.406,
cork-plates
0,045 30 cm
87,2
34.883,
cocos-mats
0,045 30 cm
144,6,
57.849,
sheep-wool 0,045
30 cm
163,5
65.406,
prices for materials
are from Austria and can differ with country.
You can combine 1) and
2), the conclusion will always be: strawbale and cellulose are the ideal
insulation-materials (even when you dont use more parameters than price only).
We have only problems in revitalisation of old buildings, where you cant use
these materials.
best wishes
Herbert
Gruber
-------------------------------
asbn austrian strawbale
network
herbert & astrid gruber
http://www.baubiologie.at
email: asbn@aon...
-------------------------------
>
Von: "Martin Oehlmann" <martin.oehlmann@wxs...>
> Antworten an:
"GSBN" <GSBN@lists....com>
> Datum:
Sun, 3 Nov 2002 19:34:51 +0100
> An: "GSBN" <GSBN@lists....com>
> Betreff:
GSBN:
>
> Hi,
>
> We would like to compare
production energy and insulation values of regular
> walls (for example:
brick + rockwool + cementelements, etc.) with sb-wall
> systems. So far
as simple bale-builders we did gently overlook these
> aspects, but are
challenged to respond.
>
> Any idea where to find a list of
specified common building materials
> including consumed production
energy and insultion values???
>
> Thanks a lot,
>
>
Martin Oehlmann
> Den Haag
> 0031-70-3650410
>
>
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