Which stone / brick to use in solid construction

Well, I don't find it bad. There are two of us plus the cat. The cat is genetically quiet, people are a bit considerate.

Wall material is overrated.

Indoors, I would take KSS, but not for the extra cost. It always depends on the overall structure: sound insulation of the duct shafts, windows and installation quality, roller shutter boxes, doors, construction of the exterior wall..

We live in Ytong.

And Kaya shops at Edeka. By the way, I have a different faith, as they say in Cologne Regarding the stone, I wouldn’t let myself get crazy about it – they are neither disaster stones nor philosopher’s stones. KS for interior walls would also be my first choice – but without other materials being a drama. Thermal bridges are not tied to any particular material; you can process anything incorrectly.

Hollow? The 3DF has a handle hole, otherwise solid. Weighs about 7kg. The smaller one, 5kg or 4kg, has no hole, is a brick.

Yes, hollow. Sand-lime brick from KS Kalksandstein. Regarding #23: [ATTACH alt="20170620_184714.jpg" type="full"]34794[/ATTACH]

Makes things easier then... (Controlled residential ventilation for the attic) [ATTACH alt="20170620_184742.jpg" type="full"]34795[/ATTACH]