I just let them build and inner wall with qcon , actually TPI blocks on the noisy and sunny side.
Nice to have a 21 cm thick wall instead of the cheap 6,5 cm concrete + rendering. And it takes care of those ugly sticking out support pillars , you see everywhere , usually every 4 meters.
TPI blocks were 29 B , the concrete ones 6 B,
Can't tell if it is much better , the house is not finished yet.
Weak point will be the single glass windows.