Is this a good/normal exterior wall construction?

[Kiro]

Hello,

I am sitting here trying to evaluate some different quotes for our upcoming house and wondering whether this is a good/normal exterior wall construction or if there are things I should question?

Exterior Walls
Panel 22x120 on nail batten 28mm.
Parock windproof for external wind protection.
Solid framework crosslaid (to avoid thermal bridges). Calculated from the outside: 45x45 (horizontal), 45x170
(pre-cut & notched for beams), age-resistant vapor barrier and sealing tape, internally 45x70 (horizontal) channel space (fully insulated with 70mm after channeling is done)
Mineral wool insulation 45+170+70, triple-layer insulation
Interior wall cladding 12mm chipboard & 13mm gypsum board in ergonomic design (W=900mm)

I am very grateful for all suggestions and opinions.

 

[injonil]

Similar to my construction in my extension, i.e., it can't get any better!

 

[b8q]

Sounds good to me! With the exception that my frame has switched the location of the 45x45 and 45x70 lying down (i.e., I have the 70 lying down on the outside of the 170 studs, and 45 mm installation space on the inside), it is very similar.

 

[Kiro]

Sounds good to me! With the exception that my frame has swapped places with the 45x45 and 45x70 lying down (i.e., I have the 70 lying on the outside of the 170 studs, and 45 mm installation space on the inside), it's very similar.

Does that difference affect the properties?

 

[b8q]

I don't think so, having 70 ultimately is because I want to extend the panel sufficiently over the base insulation, while the supporting beams rest on the foundation wall (or rather, on the sill on the foundation wall) and don't need to hang halfway outside, if you know what I mean.
It's said that the vapor barrier should be a maximum of 1/3 into the insulation (from the inside) to avoid condensation in the insulation. In your case, it's 25% in, in my case 16% in. Both should work without problems, but my measurements provide a bit more margin.
On the other hand, you get more space for electrical wiring and such.

 

[Mikael_L]

Hi,

I am trying to evaluate some different quotes for our upcoming house and wondering if this is a good/normal exterior wall construction or if there are things I should question?

Exterior walls
Panel 22x120 on nail batten 28mm.
Parock windproof for external wind protection.
Solid frame crossing (to avoid thermal bridges). Counting from the outside 45x45 (horizontal), 45x170
(pre-cut & notched for support beams), age-resistant vapor barrier and joint tape, internally 45x70 (horizontal) conduit space (fully insulated with 70mm after completion of conduit)
Mineral wool insulation 45+170+70, three-layer insulation
Internal wall covering 12mm chipboard & 13mm plasterboard in ergonomic design (B=900mm)

I am very grateful for any suggestions and opinions.

It looks good; I wouldn't wish for anything more directly.

I myself have roughly the same, but with 45+195+45 in the frame, instead of 45+170+70. Roughly the same result but it's a bit easier to attach 45's to vertical studs than 70mm. And I have OSB instead of chipboard, but that probably makes very little difference.

 

[Anders_Nilsson]

Go to www.energiberakning.se where there is a tab where you can enter data for different constructions and obtain U-values. Your wall is more than OK as others have already written. Generally, it is large glass surfaces that consume energy.

/Anders