Rain on new construction

[Vixen]

Hello!

We are in the process of building a house on a turnkey contract with a larger construction company, using a timber frame construction with mineral wool that will then be coated (ventilated facade). The exterior wall insulation is in place and has mostly, but not entirely, been covered by wind protection boards and facade boards. Over the weekend, as you know, there was quite a bit of rain combined with wind, and I suspect that the open insulation on the short side near the roof got wet, and I assume (?) that water may have run from there and downwards, i.e., under the boards attached to the insulation further down. Now I am wondering if this is something to be concerned about (= should I talk to the builder about it?) Or is it okay as long as it dries out? I haven't seen any of the houses in the area being protected.

Thanks from a layman.

 

[ljungpiparen]

According to AB04 (which is often applied to larger constructions), the contractor is responsible for any potential damages caused by the contract work. You should demonstrate this error, as it may cost the contractor dearly in the future in case of any moisture damage.

See AB 04 Chap. 5 §§ 8 & 9

 

[Vixen]

Thank you for the response. I asked the builder who said that it shouldn't be a problem as any moisture in the wall would migrate through the wind barrier boards and out. So, it will dry even after the insulation has been installed.

Do you agree?

 

[SueCia]

Thanks for the response. I asked the builder who said it shouldn't be a problem as any potential moisture in the wall would migrate through the wind protection boards and out. So, it should dry even after the insulation is built in.

Do you agree?

I don't agree if the insulation is more wet than a few surface drops. One usually wants to dry out houses thoroughly before building anything in, precisely because of moisture.

 

[Vixen]

That was my comment to the builder as well, he then claimed that the wind barrier boards are diffusion-open precisely so that any moisture can dry from the inside.

 

[Hemmakatten]

I am admittedly just an amateur, but I would be concerned about future moisture damage and would hire an inspector to check the moisture. Building in moisture and saying that it will disappear on its own sounds completely crazy.

 

[Vixen]

Yes, I'll definitely bring it up at the final inspection before moving in December. The problem with being a layman is that you can easily be misled; I find it hard to argue otherwise when the builder says that dry is drying according to ovsn. It should be said that they actually left it uncovered for a couple of days after the storm to dry.

 

[Hemmakatten]

If there is damage, it is important to find out now while the wall is open and there is an opportunity to fix it quite easily. As I wrote earlier, I would hire my own inspector for a check now.

 

[pelpet]

I would have immediately called the person responsible for controlling the construction and demanded that nothing that is damp be built over before they have looked at it. Building in moisture is usually a big, big no.