We are planning to build a new structure with timber frame and horizontal single bevel siding 22x145 mm as the façade. We had planned for a 327 mm exterior wall (22 panel, 28 air gap, wind protection, 13 inorganic board, 195 bearing framework with 2x95 insulation, vapor barrier, 45 horizontal framework with 45 insulation, 11 OSB, 13 gypsum).
The new BBR 16 regulations specify, according to information, that to break the thermal bridge before the supporting framework, an insulation board must be placed inside the air gap. If this is correct, it should work to replace the inorganic board with a 30 mm mineral wool board, right? For bearing capacity, I could reduce to a 170 mm bearing framework and corresponding insulation, so overall I would have 245 mm of insulation instead of 235 mm, even though I get an exterior wall that is 8 mm thinner.
Grateful for knowledgeable opinions and ideas on the execution, time consumption, and material costs......
