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<TT>Dear Martin, dear balers<BR>
I tried to send this email to the GSBN-list, but I dont know, if I am still listed, because it came back.<BR>
So I do it this way, maybe its interesting for the European list too.<BR>
<BR>
Responding to your idea to compare common building-products (insulation),<BR>
here is our calculation based on <BR>
* prices from local building-markets<BR>
* declarations and tests from insulation-manufacturers<BR>
* the values, Holger König (a well known Baubiologist in Germany) describes in his books (e.g. "Das Dachgeschoß", Ökobuch-Verlag)<BR>
* added by the calculations concerning production energy with the help of Gerd Zwieners book "Ökologisches Baustoff-Lexikon" (C.F.Müller). <BR>
<BR>
(European) terms: <BR>
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<BR>
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)<BR>
k-value (new after CEN: U-value): k= W/m2K (Wärmedurchgangskoeffizient, dont know the english word), depends on the thickness of the wall<BR>
PEI: amount of energy to manufacture/transport/.. a matarial<BR>
<BR>
1) comparison of values<BR>
<BR>
material L LRtr10 raw-weight included prod-energy<BR>
(W/m2K) kg/m3 (PEI: kWh/m3)<BR>
<BR>
strawbales 0,045 0,038 100 5-30<BR>
(as proved in our official tests in Austria)<BR>
<BR>
cellulose 0,045 0,038 35-70 110-190<BR>
(made from 80% newspaper)<BR>
<BR>
EPS-W15 0,038 0,038 15-30 400-1.050<BR>
(polystyrol-plates: XPS or EPS)<BR>
<BR>
XPS 0,020-0,035 15-30 400-1.050<BR>
<BR>
fibreglass 0,038 0,038 100 100-500<BR>
<BR>
reed 0,045-55 0,039-45 225 ? (maybe same as SB) <BR>
(depending on the amount of wire to hold it together)<BR>
<BR>
flax-mat 0,045 0,038 150 ? (prob. 30-50)<BR>
(Heraflax)<BR>
<BR>
cork-plates 0,045 0,038 80 ? low, but long <BR>
(heat-expanded cork) transport-ways<BR>
<BR>
cocos-mats 0,045-51 0,038-42 50-125 95<BR>
<BR>
sheep-wool 0,045 0,038 100 5-50 depends on<BR>
(Daemwool, washed and impregnated with Mitin) transport to wash<BR>
<BR>
<BR>
Conclusion: energy-amortization-times of insulation-materials:<BR>
<BR>
strawbale, reed, cellulose: 0-1 month<BR>
cork, sheep-wool: -2 month (depending on transport-distances to manufacture/wash the material)<BR>
cocos-plates: 2-3 month<BR>
fibreglass (mineral- or stonewool): 8 month<BR>
polystyrol (EPS/XPS): 13- month<BR>
polyurethan (PU): 17-18 month (this is the ugly thing people spray between window- and doorspaces)<BR>
<BR>
<BR>
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<BR>
The following values are necessary to guarantee a wall with U = 0,15 W/m2K (standard for well-insulated low-energy-houses in Europe)<BR>
<BR>
material LRTr10 thickness of wall price/m2 for 150m2<BR>
<BR>
strawbales 0,045 30 cm 3,6 1.453, <BR>
<BR>
cellulose 0,045 30 cm 18,3 7.326,<BR>
<BR>
EPS-W15 0,038 24 cm 20,3 8.139,<BR>
<BR>
fibreglass 0,038 24 cm 23,5 9.419,<BR>
<BR>
reed 0,045 30 cm 25,6 10.232,<BR>
<BR>
flax-mat 0,045 30 cm 51, 20.406,<BR>
<BR>
cork-plates 0,045 30 cm 87,2 34.883,<BR>
<BR>
cocos-mats 0,045 30 cm 144,6, 57.849,<BR>
<BR>
sheep-wool 0,045 30 cm 163,5 65.406,<BR>
<BR>
prices for materials are from Austria and can differ with country.<BR>
<BR>
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. <BR>
<BR>
best wishes<BR>
Herbert Gruber<BR>
-------------------------------<BR>
asbn austrian strawbale network<BR>
herbert & astrid gruber<BR>
<FONT COLOR="#0000FF"><U>http://www.baubiologie.at<BR>
</U></FONT>email: <FONT COLOR="#0000FF"><U>asbn@aon...<BR>
</U></FONT>-------------------------------<BR>
<BR>
> Von: "Martin Oehlmann" <<FONT COLOR="#0000FF"><U>martin.oehlmann@wxs...</U></FONT>><BR>
> Antworten an: "GSBN" <<FONT COLOR="#0000FF"><U>GSBN@lists.greenbuilder.com</U></FONT>><BR>
> Datum: Sun, 3 Nov 2002 19:34:51 +0100<BR>
> An: "GSBN" <<FONT COLOR="#0000FF"><U>GSBN@lists...der.com</U></FONT>><BR>
> Betreff: GSBN:<BR>
> <BR>
> Hi,<BR>
> <BR>
> We would like to compare production energy and insulation values of regular<BR>
> walls (for example: brick + rockwool + cementelements, etc.) with sb-wall<BR>
> systems. So far as simple bale-builders we did gently overlook these<BR>
> aspects, but are challenged to respond.<BR>
> <BR>
> Any idea where to find a list of specified common building materials<BR>
> including consumed production energy and insultion values???<BR>
> <BR>
> Thanks a lot,<BR>
> <BR>
> Martin Oehlmann<BR>
> Den Haag<BR>
> 0031-70-3650410<BR>
> <BR>
> <BR>
> ----<BR>
> For instructions on joining, leaving, or otherwise using the GSBN list, send <BR>
> email to <FONT COLOR="#0000FF"><U>GSBN@lists....com</U></FONT> with HELP in the SUBJECT line. <BR>
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> </TT>
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