ᐅ Difference between single-wall masonry and double-wall masonry

Hello,

can someone explain the difference to me?
What advantages and disadvantages arise from it?
Which one is the current standard?

Single-layer for plastered facades: construction from inside to outside: masonry, external thermal insulation composite system (ETICS) reinforcement, plaster

Double-layer: masonry, insulation, masonry with plaster or facing brick

What is generally used?
I assume that double-layer masonry provides better insulation?

You can't really say it like that.. we are building single-layer KFW70... there are always pros and cons... For brick veneer, construction is exclusively double-layer.. For render, you can build either single- or double-layer... Some say that with external thermal insulation composite systems (ETICS) the outer facade might be somewhat less stable.. but I cannot confirm that, the reinforcement and render are strong enough that damage from something like a "leaning bicycle" is unlikely...

Not quite correct. A single-layer masonry wall can insulate just as well as a multi-layer masonry wall. A multi-layer masonry wall with external thermal insulation composite systems (ETICS, also called external insulation or “WDVS” in German) can be built more cheaply. However, a wall with ETICS can cause major problems in the event of a fire, the plaster surfaces are more prone to mold and algae growth, and the entire masonry cannot regulate moisture nearly as well as a single-layer brick wall. The façade with ETICS is made of polystyrene and is therefore not solid at all. You can’t even mount a satellite dish or an awning without special fixtures, and window sills hang off the wall like shelves with a bracket... I don’t even know where to start.

Single-layer = wall made entirely from one material (e.g., brick 36.5cm (14.4 inches)) = gold standard (this is how grandpa used to build)

Double-layer = one layer made from one material and another layer made from a different material (e.g., aerated concrete and polystyrene) = cheap standard (this is how we build today because being stingy is “cool”)

Triple-layer = one layer etc. (e.g., brick / insulation / clinker brick) = “Mercedes” but not necessarily better (this is how grandpa built when there was more money)

We build our houses with single-layer brick walls. The advantage is the excellent moisture-regulating property, which no other material can provide. The standard wall thickness is 36.5cm (14.4 inches). There are different designs for better thermal insulation of the building envelope. However, I always consider the much better sound insulation the biggest advantage. A thinner wall provides much less sound protection.

What many homeowners unfortunately don’t consider is that ETICS has very little to do with sound insulation. You can calculate a nice U-value (important for measuring the thermal transmittance of a wall) and then feel really comfortable because of that.

...just take a look online for “Wienerberger,” “Röben,” “Eder,” etc. You’ll quickly find plenty of information. The real question is, why do you even need ETICS?