ᐅ Wall construction using Neopor blocks? Does anyone have experience?
Created on: 2 Jan 2015 12:56
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barcardiHello,
I recently came across the Wolf-Thermo modules, where the walls are assembled from prefabricated Neopor blocks and then filled with concrete.
The performance values, in terms of U-value and sound insulation rating, seem really excellent.
Does anyone have experience with these systems or can share any pros and cons? Is this a genuine alternative to a traditional wall construction using Poroton bricks plus external thermal insulation composite systems (ETICS) / external wall insulation?
Regards, barcardi
I recently came across the Wolf-Thermo modules, where the walls are assembled from prefabricated Neopor blocks and then filled with concrete.
The performance values, in terms of U-value and sound insulation rating, seem really excellent.
Does anyone have experience with these systems or can share any pros and cons? Is this a genuine alternative to a traditional wall construction using Poroton bricks plus external thermal insulation composite systems (ETICS) / external wall insulation?
Regards, barcardi
Inside, you usually have about 5cm (2 inches) of Neopor insulation, and at the spots where you want to hang heavy items, you first need to screw in a beam and cut out the Neopor beforehand.
Otherwise, I didn’t think the whole "Lego house" concept was bad at all. We initially planned to build like that, but ended up renovating an older building instead. However, you should make sure the foundation slab is properly insulated.
Back then, we found a company that promoted the insulation value of this building method, but when we asked why the foundation slab wasn’t insulated at all, they reacted defensively. That discouraged us from working with them because if a company treats potential clients that way upfront, they probably won’t be any friendlier during the process.
With today’s knowledge, I would rather build with thick Ytong blocks and avoid external thermal insulation composite systems (ETICS) if possible. Those systems cause too many problems—not mold or “wall breathing” (which is nonsense) but issues like: facing bricks on ETICS or cracks in the plaster? How do you hang heavy objects on the outside, such as beams for a canopy? Yes, there are long screws, but that’s not an ideal solution. A more stable building material on the exterior and interior that also insulates well is better. Plus, you get fewer thermal bridges.
We removed the exterior wall in the basement of one room (it wasn’t load-bearing) and replaced it with Ytong, and I’m quite happy with that.
Otherwise, I didn’t think the whole "Lego house" concept was bad at all. We initially planned to build like that, but ended up renovating an older building instead. However, you should make sure the foundation slab is properly insulated.
Back then, we found a company that promoted the insulation value of this building method, but when we asked why the foundation slab wasn’t insulated at all, they reacted defensively. That discouraged us from working with them because if a company treats potential clients that way upfront, they probably won’t be any friendlier during the process.
With today’s knowledge, I would rather build with thick Ytong blocks and avoid external thermal insulation composite systems (ETICS) if possible. Those systems cause too many problems—not mold or “wall breathing” (which is nonsense) but issues like: facing bricks on ETICS or cracks in the plaster? How do you hang heavy objects on the outside, such as beams for a canopy? Yes, there are long screws, but that’s not an ideal solution. A more stable building material on the exterior and interior that also insulates well is better. Plus, you get fewer thermal bridges.
We removed the exterior wall in the basement of one room (it wasn’t load-bearing) and replaced it with Ytong, and I’m quite happy with that.
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dersiegfrid14 Apr 2021 09:17Hello,
I built using a "kit" made of Neopor. Specifically, a kit from Izodom Germany. I am very satisfied. The shell of the house was completed in one week, and the house was turnkey in five weeks. All at a good price. It is a Passive House Plus (or a bungalow) with a photovoltaic system, solar water heating, and ventilation. 170 sqm (1830 sq ft) including the land for €200,000 (without a basement, as I didn’t need one). The house alone cost €160,000. I assembled the elements myself (the instructions are provided) and had the electrical work inspected only by a certified electrician. I am very happy and will no longer need gas or oil in the future, and I even sell electricity.
For hanging things (inside and outside): you just need to use longer screws and drill/screw directly into the concrete. One screw can hold about 150 kg (330 lbs)!
I built using a "kit" made of Neopor. Specifically, a kit from Izodom Germany. I am very satisfied. The shell of the house was completed in one week, and the house was turnkey in five weeks. All at a good price. It is a Passive House Plus (or a bungalow) with a photovoltaic system, solar water heating, and ventilation. 170 sqm (1830 sq ft) including the land for €200,000 (without a basement, as I didn’t need one). The house alone cost €160,000. I assembled the elements myself (the instructions are provided) and had the electrical work inspected only by a certified electrician. I am very happy and will no longer need gas or oil in the future, and I even sell electricity.
For hanging things (inside and outside): you just need to use longer screws and drill/screw directly into the concrete. One screw can hold about 150 kg (330 lbs)!
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