So, we are facing a decision between two building contracts. We will receive the final offers with all changes in the coming days.
Building contract #1 uses 17.5cm (7 inches) Poroton T18 blocks, while building contract #2 uses 24cm (9.5 inches) Poroton T18 blocks. External thermal insulation composite system (ETICS) is specified as 20cm (8 inches) for both. Now I’m wondering if 17.5cm (7 inches) could present any disadvantages for us, and if so, which ones? Based on gut feeling and the included services, we actually prefer building contract #1.
Thank you very much in advance for your help.
Best regards
Building contract #1 uses 17.5cm (7 inches) Poroton T18 blocks, while building contract #2 uses 24cm (9.5 inches) Poroton T18 blocks. External thermal insulation composite system (ETICS) is specified as 20cm (8 inches) for both. Now I’m wondering if 17.5cm (7 inches) could present any disadvantages for us, and if so, which ones? Based on gut feeling and the included services, we actually prefer building contract #1.
Thank you very much in advance for your help.
Best regards
Hello,
- The point about the fasteners is correct; you definitely need special anchors. (This is even more crucial in a prefab house with a timber frame.)
- What do you mean by that? Very quickly very hot and then cold again? I can’t confirm that... But we are also talking about an attic apartment with insulation from the 1970s (so basically "no" insulation), where we couldn’t sleep in the summer anymore, it was like a sauna.
- The point about the fasteners is correct; you definitely need special anchors. (This is even more crucial in a prefab house with a timber frame.)
- What do you mean by that? Very quickly very hot and then cold again? I can’t confirm that... But we are also talking about an attic apartment with insulation from the 1970s (so basically "no" insulation), where we couldn’t sleep in the summer anymore, it was like a sauna.
G
Goldi091117 Aug 2016 11:31A few days ago, I took a closer look at a 36.5-meter (120 feet) T7 MW, and there is enough material for fastening. In my opinion, a larger T8 would really make things difficult.
Good evening
I always wonder where comments like that come from. Yes, with lightweight Poroton blocks you need a few extra anchors if you really want to hang heavy items. In our current house, all walls are made of Poroton hollow-core bricks, the somewhat heavier ones. There, even standard anchors hold perfectly fine.
Mass? Have you ever calculated the wall weights? Roughly estimated, a 17.5cm (7 inches) calcium silicate wall weighs about 260 kg/m² (53 lb/ft²), while a 36cm (14 inches) Poroton T9 wall weighs about 240 kg/m² (49 lb/ft²). Whether that really makes a significant difference...
If you compare a 24cm (9.5 inches) calcium silicate wall with a 24cm (9.5 inches) Poroton wall, the comparison looks different. But with calcium silicate I was always told the big advantage is the thinner wall thickness. Nobody wanted to build 24cm (9.5 inches) walls there.
Calcium silicate offers the particular advantage of being extremely compressive strength, allowing very thin walls. But you pay for that by giving up the option to hide wastewater pipes, ventilation, etc., inside the wall. Instead, you get them nicely boxed in front of you, whereas they would be concealed inside a 24-36cm (9.5-14 inches) Poroton wall.
Best regards,
Andreas
Barossi schrieb:
Hello,
- Attaching things to interior walls --> a disaster
- Lots of insulation and little mass - beware this negatively charged term - barrack climate.
Best regards, Barossi
I always wonder where comments like that come from. Yes, with lightweight Poroton blocks you need a few extra anchors if you really want to hang heavy items. In our current house, all walls are made of Poroton hollow-core bricks, the somewhat heavier ones. There, even standard anchors hold perfectly fine.
Mass? Have you ever calculated the wall weights? Roughly estimated, a 17.5cm (7 inches) calcium silicate wall weighs about 260 kg/m² (53 lb/ft²), while a 36cm (14 inches) Poroton T9 wall weighs about 240 kg/m² (49 lb/ft²). Whether that really makes a significant difference...
If you compare a 24cm (9.5 inches) calcium silicate wall with a 24cm (9.5 inches) Poroton wall, the comparison looks different. But with calcium silicate I was always told the big advantage is the thinner wall thickness. Nobody wanted to build 24cm (9.5 inches) walls there.
Calcium silicate offers the particular advantage of being extremely compressive strength, allowing very thin walls. But you pay for that by giving up the option to hide wastewater pipes, ventilation, etc., inside the wall. Instead, you get them nicely boxed in front of you, whereas they would be concealed inside a 24-36cm (9.5-14 inches) Poroton wall.
Best regards,
Andreas
T
toxicmolotof7 Aug 2016 22:59He wants to build here with a 17.5cm (7 inches) Poroton wall. That means half the mass compared to a 36cm (14 inches) one.
toxicmolotow schrieb:
He wants to build here with a 17.5cm (7 inch) Poroton wall. That’s only half the mass of a 36cm (14 inch) wall.@toxicmolotow
Again! Wrong! I have stated several times that I am not set on this and that I will not build that way if the builder decides otherwise. You should stick to the facts if you want to report something!!
T
toxicmolotof8 Aug 2016 09:50Dude, you simply didn’t understand the point I was making. So, topic missed.
Here, 17.5 Poroton should be compared with 17.5 calcium silicate bricks, not 17.5 calcium silicate with 36 Poroton.
This wasn’t about you, but about Andreas, so he wouldn’t misinterpret anything.
Build with whatever you want.
Here, 17.5 Poroton should be compared with 17.5 calcium silicate bricks, not 17.5 calcium silicate with 36 Poroton.
This wasn’t about you, but about Andreas, so he wouldn’t misinterpret anything.
Build with whatever you want.
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