Which developers build with POROTON in SH

Yes, stupid incorporations. I’ll never get used to them.

Back to the topic. The OP was fixated on Poroton. My builder said last year when I asked whether brick or Ytong, that was just tradition. South uses brick, north uses Ytong. He doesn’t see a difference. Both like to absorb water because they are porous. However, the Ytong is glued almost without water, instead of using mortar. Our house was built up in March, sealed in April, plastered in April/May. Inside it is really bone dry. Zero moisture left in the Ytong. And when I touch the wall, it always feels warm. Some say it offers worse sound insulation. Might be. Where we are building it’s quiet outside anyway. So whatever.
Soon, a lot more water will come in through the screed and interior plaster. But that wouldn’t be different with Poroton.
I don’t know the stone prices, but I see the efficiency. Two journeymen built the whole house in seven days, up to the concrete in the ring beam. That’s about 110 man-hours at 40,- gives 4400 plus tax for labor. For the whole house. Karsten

I have also found out that WBI builds houses with bricks! BUT at the same time, they only build with a FUTURA floor slab with thermal insulation‎

Has anyone had experience with that?

Hi,

A floor slab with insulation underneath is nothing special, that's normal. But: if I’m seeing it correctly, they’re laying the underfloor heating directly into the floor slab and the floor slab would also be the subfloor. That means if that’s correct, you no longer have a floating screed in the ground-floor rooms and quite certainly you have a wonderful sound bridge from one room to the next.

At first glance, I would see that very critically.

About the brick: Poroton is great, I insisted on it back then and we built with bricks. And I spent ages thinking about which brick, which insulation, etc.

From today’s perspective, that was probably all nonsense!

Moisture regulation is at best the plaster (but only together with silicate paint!!). If your house is so damp that the actual brick has to/can absorb moisture, you have a serious problem!

I would only build now with a maximally heavy brick and ETICS [External Thermal Insulation Composite System] in front. Definitely not with an unfilled T7/T8/T9 brick. Acoustically, you might as well sleep in a tent.

We built with 24 cm T14 bricks and ETICS. Insulation values are of course top, in the passive house range. But the noises are somewhat less dampened than we were used to from our previous house. It’s not loud, but you can definitely hear the party in the neighbor’s garden!

Hanging cabinets, etc. is still possible with the T14 bricks, also with normal dowels. But you really have to be careful what you’re doing.

My advice from today’s perspective: Either the very simple (and cheap!) hollow-core Poroton bricks in 24 cm thickness or straight up sand-lime bricks. Then 16 cm insulation in front and peace of mind.

Best regards,

Andreas

Thanks first of all for the explanatory words.

Sand-lime brick would also be my first choice. Solid mass! Especially here in the north, a KS building leaves many hot summer days completely unaffected. (es gibt auch nicht viele

Sand-lime brick would also be my first choice.

Since we would like the walls of our city villa to be made of POROTON,

I was just about to ask that
Does "we would like Poroton" literally mean "we want Poroton" or actually "we do not want Ytong"?

Every stone has its own image, sometimes more fact, sometimes more myth. "Poroton" seems to me to be number one in the hearts of all whole-grain bread home bakers, who on the one hand perceive it romantically as a synonym for "biologically valuable in construction," but on the other hand surprisingly often almost as "naturally" have never considered clay plaster. "Ytong" is currently often branded with the mark of Cain, being the big noise transmitter. That poor sound insulation could be related to slimming down the load-bearing wall material to size zero in favor of a lot of ETICS thickness is overlooked. The aerated concrete is to blame.

Sometimes I feel like I am at the supermarket fruit counter: if you want more variety than always just the same four apple varieties, you often search in vain. With stones, there seems to be a similar tendency: you probably have to go to the "farm shop" to be whispered to that beyond the seven mountains and the seven dwarfs there is also sand-lime brick after all.

Apart from the fact that I consider no stone to be grossly unsuitable (but also none to be the Messiah); and by the way I can only wonder why one hears shouts of "Poroton" and "Ytong" everywhere, considerably less often "SL" and hardly anyone (for example) seems to know "KLB" or "Bisotherm": I would advise not to latch onto one building material so firmly that you choose the builder based on that.

There are more suitable criteria (healthy corporate structure, good reputation in the region, ...) for choosing a builder. A material and the craftsman experienced with it should be seen as a "system." And no one risks a reputation as a builder of junk properties because they save two marks fifty per cubic meter in purchasing.

And, mind you: with brick "sealed all around" in chemical plaster, there is not much "bio" left. I can understand the discussion least of all when it is actually not really about a wall building material, but strictly speaking only about the backing brick of a petrochemical façade.