ᐅ Is Insulation Necessary for Poroton Bricks?

Patricck schrieb:

on the other hand, nothing can breathe in there anymore.

I just went down to the basement (with full thermal insulation). It was completely silent in there. Upstairs (still without full thermal insulation), you can hear the house breathing quietly. Unfortunately, it sometimes snores. That’s also the reason I’m adding insulation. I can’t sleep if someone is breathing loudly or snoring. *Sarcasm off*

Snowy36 schrieb:

From the way the original poster replied, I think the shell is already up and a change is no longer possible... and we have the 42cm (16.5 inches), which makes no difference in sound insulation compared to the 36cm (14 inches) ... so if anything, always use the filled version.

Is the shell really already built?

Since the original poster also mentioned sound insulation in the discussion with the architect, I would like to add the following recommendation: Do not “dip” the Poroton blocks but smooth them with a trowel.

There is really nothing better than Poroton, as long as a few things are taken into account.

One issue can be drafts caused by air movement through the holes. If air gets in there, it might cause drafts near electrical outlets. This can be counteracted by partially filling the air channels with some construction foam.

Otherwise, the exterior walls can be finished with insulating plaster. That makes a big difference. By the way, I don’t see why you would want to insulate 40cm (16 inches) thick walls in the first place. That tends to do more harm than good.

Poroton is a natural building material with excellent properties. Air is the best thermal insulator.

My wall construction from inside to outside is as follows:
12.5 mm (1/2 inch) drywall
12 mm (1/2 inch) OSB, seams sealed airtight
PE foil, sealed airtight
18 mm (3/4 inch) OSB, seams sealed airtight
180 mm (7 inches) timber frame with mineral wool insulation WLG035
24 mm (1 inch) spruce boards, nailed diagonally
Breathable membrane
60 mm (2 1/2 inches) battens vertical with glass wool insulation WLG035
60 mm (2 1/2 inches) battens horizontal with glass wool insulation WLG035
Doerken special membrane for ventilated facades
30 mm (1 1/4 inches) battens vertical as a ventilation gap
Blue-black fiber cement panels sized 60 cm x 30 cm (24 inches x 12 inches)

With this wall setup, I achieve perfect sound insulation, very good thermal performance, and excellent summer heat protection.

Of course, this works only with controlled mechanical ventilation. A simple brick construction would be too expensive for me in the long run.

maulwurf79 schrieb:

With this wall construction, I have perfect sound insulation and very good thermal performance, plus excellent summer heat protection.

Of course, that only works with controlled mechanical ventilation. A simple brick building is too expensive for me in the long run.

And the wall construction has absolutely nothing to do with the problem discussed here. By the way, my Rolls Royce is also perfectly insulated! I even think its wall structure is better than your drafty wooden shack.

And this can of course be achieved without controlled mechanical ventilation... there are many other methods that manage it sufficiently well 🙂

Stefan001 schrieb:

And the construction has absolutely nothing to do with the problem discussed here. By the way, my Rolls Royce is perfectly insulated! I even think its wall construction is better than your drafty wooden shack.

And of course, this can be done without mechanical ventilation... there are many other methods that can handle it well enough 🙂

Oh dear. Do you really need to get insulting right away? My "wooden shack" is to a standard 36cm (14 inch) Poroton brick house without insulation and mechanical ventilation what a Formula 1 car is to a Ford Model T.

I am constantly shocked at how backwards construction still is nowadays. All the information is available, yet many people still build houses today that are not significantly different from those our parents built. Well, everyone has to make their own choices.