This construction is fairly common in many eastern European countries. For one or two story homes they have adequate strength. For higher loadbearing structures they may not be adequate. Concrete masonry or even hollow clay masonry is far stronger.

The strength varies with the density (better insulation is weaker). Beware of substituting heavier densities since the insulation is not as good as advertised. Also for a given density, the strength varies with the orientation of the product when it was made.

The units are solid, so there utilities must be designed differently from hollow masonry or wood walls.

Due to the mass, the actual insulation performance is much better than that provided by light construction systems (wood with foam or fiberglass insulation).

In the Polish climate, the units must be protected to provide a durable structure. The traditional Polish plaster or rendering may have some trouble sticking to the gas concrete or AAC units unless a bonding agent is used.

I has not been successful in the U.S. because of the tradition of cheap, lightweight temporary wood frame construction and resistance to changing plumbing, mechanical and electric installation methods. The extra cost of Ytong or other masonry products is greatly exagerated, especially when considering life-cycle costing and real building life.