![]() ![]() Many old houses are being insulated with styrofoam on the outside by now. it has 40 cm styrofoam on the outside and solar collector on the roof. i ve seen one new built house in this city (50k inhabitants) that looks like a passivhouse. In germany most 1 family houses are from the 70, 80ies or older. other option would be to use a glue-type-product to glue glass-fibre-mesh unto the wall. cob-plaster will bind mechanically, but i do not think, that it will do well on acrylic stuff. I think, i need to try, what kind of plaster will bind to the wall. I m not sure if i need mold-protection in the plaster. i could treat it with baking soda (like 4% dissolved in hot water). they did not even have borax detergents in germany. I did not find bromine or boric acid online for sale. but it s a mixture, a commercial plaster ready to use ![]() The product, i looked at, did not state that. There are different NHL lime products available here. Is the whole country like that or only certain cities? I've watched some incredible videos, what beautiful landscape, architecture.you are lucky! I have heard such wonderful things about alot of natural energy efficient "Passivhaus" certified homes, as Germany has set the global standard to follow as we are here in the US. That will depend on how well you can clean out the acrylic junk out of the pores and allow the binders to bond. You should not need it just get a good chemical bond. Some other lathe mesh options are fiberglass or bassalt rock rebar.You could use steel if you had to but it might rust jack.If you have to use it put at least 4"(11 CM) plaster to keep moisture and air (oxidation) away from it. Boric acid or bromine might work, anti-fungi and fire retardants. I get it free at my utility company.ĭo they not sell Borax as a laundry detergent or household general cleaner in Germany? You might try some fly ash (~5-10%) as a pozzolan if it is cheap and available, it can react with lime, stabilize soil, or portland cement in the brick for a better bond. Reason being is clay has bigger internal molecular voids to manage more moisture content(up to 40% by volume) than lime (up to 30% by volume), and the brick has some clay in it to bond to. Add a little soil depending on much clay it has, lots of clay less. You may as you said be better off mixing mostly lime plaster on lime brick to get a good bond after the surface prep I described. If this is an exterior application go with 5. I was thinking heat you beat me to it I'm not sure what lime you got over there is it not a hydraulic NHL 2, 3.5, 5 stated on the container? If so I'd start with a 3.5 then move to a 5 if I had to that has more binder in it but is not as permeable. ![]() Tobias, sounds like acrylic paint unfortunately the stuff is toxic junk! Get what you can off so it does not cause mold and bacteria under your plaster. ![]()
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