Based on the following statement from another thread here
What should you choose?
What are the advantages and disadvantages of filled and unfilled?
Thank you.
tabtab schrieb:
That doesn’t matter. T8 / T9 filled or unfilled always has the same U-value. Only the soundproofing value changes
What should you choose?
What are the advantages and disadvantages of filled and unfilled?
Thank you.
One disadvantage of hollow bricks is their thin webs. As a result, they are less compressive strength and structurally somewhat less load-bearing. It is not uncommon to hear that some bricks arrive damaged at the construction site because they are prone to cracking and sometimes break when unloading the pallet. The thin webs also make it more difficult to attach large or heavy items to the wall, such as awnings. Cracks in the plaster are also more likely than with solid bricks that have thicker webs. Using a fiberglass-reinforced plaster can help with this, but it eliminates the price advantage compared to solid bricks.
Solid bricks naturally have disadvantages as well, which vary somewhat depending on the filling material (perlite, mineral wool, or more rarely bricks filled with wood fibers, etc.). A frequently mentioned drawback is the presence of more thermal bridges, since gaps are simply filled with mortar or plaster. Joint widths of up to 5mm (0.2 inches) may be filled with mortar, but in practice, even wider gaps have been observed.
Solid bricks naturally have disadvantages as well, which vary somewhat depending on the filling material (perlite, mineral wool, or more rarely bricks filled with wood fibers, etc.). A frequently mentioned drawback is the presence of more thermal bridges, since gaps are simply filled with mortar or plaster. Joint widths of up to 5mm (0.2 inches) may be filled with mortar, but in practice, even wider gaps have been observed.
D
daniels8719 Jul 2016 07:41For joint widths of 5 mm (0.2 inches) or more, the joints must be sealed with mortar on both sides at the wall surface during masonry work.
Hello,
Our house was built with T14 bricks; originally, T18 bricks were planned, but they were not available at the time. Even the T14 bricks feel like puff pastry in terms of structure and strength, so I’m still unsure how I’m supposed to securely attach kitchen cabinets later.
The hollow T8 bricks are about as delicate as Meissen porcelain and sound similar when tapped. I seriously doubt whether effective soundproofing can be achieved with them.
Our shell builders also mentioned that with these types of constructions, they spend more time dealing with curses and broken pieces than actually laying bricks.
Mounting cabinets on such walls is quite complex—you quickly end up needing chemical anchors and similar solutions...
We are building with 24cm (9½ inch) T14 bricks and 16cm (6½ inch) external insulation (ETICS). From today’s perspective, I would seriously consider a wall construction using 17.5cm (7 inch) or 24cm (9½ inch) hollow clay blocks (which are usually used for interior walls, but have high density and mass, providing excellent sound insulation) combined with ETICS. That is how the house we currently live in was built. It would probably have been a good choice, but unfortunately, it’s rarely offered anymore.
Long story short: I would be very skeptical of a monolithic wall build using hollow T8 bricks. Personally, I consider a simple, as heavy as possible brick with ETICS to be a better solution. And if you want to avoid plastic-based insulation on the outside, you can always use mineral wool instead.
Best regards,
Andreas
Our house was built with T14 bricks; originally, T18 bricks were planned, but they were not available at the time. Even the T14 bricks feel like puff pastry in terms of structure and strength, so I’m still unsure how I’m supposed to securely attach kitchen cabinets later.
The hollow T8 bricks are about as delicate as Meissen porcelain and sound similar when tapped. I seriously doubt whether effective soundproofing can be achieved with them.
Our shell builders also mentioned that with these types of constructions, they spend more time dealing with curses and broken pieces than actually laying bricks.
Mounting cabinets on such walls is quite complex—you quickly end up needing chemical anchors and similar solutions...
We are building with 24cm (9½ inch) T14 bricks and 16cm (6½ inch) external insulation (ETICS). From today’s perspective, I would seriously consider a wall construction using 17.5cm (7 inch) or 24cm (9½ inch) hollow clay blocks (which are usually used for interior walls, but have high density and mass, providing excellent sound insulation) combined with ETICS. That is how the house we currently live in was built. It would probably have been a good choice, but unfortunately, it’s rarely offered anymore.
Long story short: I would be very skeptical of a monolithic wall build using hollow T8 bricks. Personally, I consider a simple, as heavy as possible brick with ETICS to be a better solution. And if you want to avoid plastic-based insulation on the outside, you can always use mineral wool instead.
Best regards,
Andreas
Hello Andreas,
we actually have exactly what you consider very critical and not recommended: unfilled, monolithic T9 bricks with thin webs, and we are satisfied with them.
Our bricklayers were able to work with them without breaking pieces, and they are quite heavy, so that’s not an issue. Sure, the webs are very thin, but they don’t just break “for no reason.”
The kitchen is installed, and other cabinets are already attached to the exterior walls. You do need special anchors, of course, and you shouldn’t drill at full power with a hammer drill on the exterior wall. But I’d almost say that’s true for any modern brick...
During the rough installation of the electrical wiring and especially the plumbing, you can notice that with these bricks the webs can break quite easily, and the holes or channels can become larger than expected if you’re not careful. But you only learn that once, and then you know. After that, you plaster everything over anyway.
Good luck
we actually have exactly what you consider very critical and not recommended: unfilled, monolithic T9 bricks with thin webs, and we are satisfied with them.
Our bricklayers were able to work with them without breaking pieces, and they are quite heavy, so that’s not an issue. Sure, the webs are very thin, but they don’t just break “for no reason.”
The kitchen is installed, and other cabinets are already attached to the exterior walls. You do need special anchors, of course, and you shouldn’t drill at full power with a hammer drill on the exterior wall. But I’d almost say that’s true for any modern brick...
During the rough installation of the electrical wiring and especially the plumbing, you can notice that with these bricks the webs can break quite easily, and the holes or channels can become larger than expected if you’re not careful. But you only learn that once, and then you know. After that, you plaster everything over anyway.
Good luck
Hi WildThing,
I'm glad to hear you’re satisfied. Do you already live in the house? How is the sound insulation? Honestly, I’m a bit concerned about our T14 bricks, even though we live in a very quiet neighborhood.
I would never say that I consider T9 bricks not recommended. That is beyond my expertise.
I only said that personally I’m skeptical about T9/T8 based on what I have seen. That doesn’t mean I’m right, though...
Best regards,
Andreas
WildThing schrieb:
Hello Andreas,
we have exactly what you consider very critical and not recommended. Unfilled, solid T9 bricks with thin webs, and we are satisfied.
I'm glad to hear you’re satisfied. Do you already live in the house? How is the sound insulation? Honestly, I’m a bit concerned about our T14 bricks, even though we live in a very quiet neighborhood.
I would never say that I consider T9 bricks not recommended. That is beyond my expertise.
I only said that personally I’m skeptical about T9/T8 based on what I have seen. That doesn’t mean I’m right, though...
Best regards,
Andreas
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