ᐅ 30 cm Thick Exterior Wall – Compliant with the 2014 Energy Saving Regulation?

Grym schrieb:
Poroton T8 is available from Wienerberger in a thickness of 30 cm (12 inches). This achieves a U-value of 0.26 and just meets the requirement of 0.28. Whether there are any structural issues, I have no idea.

It doesn’t really make sense. Why not at least 36.5 cm (14 inches) or 42.5 cm (17 inches) for monolithic masonry?

According to the following information page, the limit for energy saving regulation (EnEV) exterior walls is 0.24, so what exactly is the limit now? I’m a bit confused.

link removed by moderation; building expert

Also, this is the first time I’ve heard that better window and roof insulation allow for a worse U-value for walls. (That would be great!)

36.5 cm (14 inches) would also be possible, but for planning/dimensions/size, 30 cm (12 inches), if feasible, would be better.

PS: The 30 cm (12 inches) refers purely to the block itself (without plaster, etc.).

Then reinforced concrete with ETICS (External Thermal Insulation Composite System)...

Your link is for existing buildings/renovation. This shows how pointless the idea is. Your house would perform worse than a freshly renovated old building.

Why would 30 cm (12 inches) be better for the design? Doesn’t your planner have a thicker pen?

If the plot is only 11 meters (36 feet) wide, it really makes a difference whether you have 13 centimeters (5 inches) more or less available... that's just my guess.

30cm (12 inches) aerated concrete should be sufficient.

That's right, PP 1.6-0.25 with a lambda of 0.07 is also available in 30cm (12 inches). This results in a U-value of about 0.22 at 30cm (12 inches) plus plaster. However, I think it becomes very expensive.