Installing ceiling - Unheated house issues? battens or not?

[Olof_f]

Hello!

I am working on building a house, and it's time to install the ceiling. It's a white-glazed interior panel made of tongue and groove boards, 15 mm thick. The boards were purchased this summer and have been stored under a roof in the house that still lacks heating.

When I read the installation instructions, the panel should be installed at room temperature, around 20 degrees. I can wait until the outdoor temperature is sufficiently high, but I would obviously like to get it done so I can proceed to the next step. What would you do?

Furthermore, I had planned to nail the ceiling directly to the rafters, but here the standard is a 80 cm center-to-center distance between the rafters. The manufacturer recommends a maximum of 60 cm center-to-center. Should I install battens in the ceiling to achieve the correct center-to-center distance? This would mean the ceiling height would be about 5 cm lower in the loft area, which is already quite low.

The insulation is flax and cellulose, 195 mm, and will be covered with air barrier paper.

 

[tergo]

How would you have done it?

followed the assembly instructions

 

[roli]

What is above the interior ceiling, an attic, another floor? Can your panel act as a fall protection system? If not, that will also be required and will affect your ceiling height.

 

[fribygg]

Add an extra rule between the "rafterna" if you don't want sparsely spaced paneling, a cc measurement of 400 should work excellently with a 15 mm panel.

 

[Olof_f]

What is above the ceiling, attic, another floor? Does your panel act as fall-through protection? Otherwise, that is also required, which will affect your ceiling height.

It's insulation, windproof board, air gap, and then the outer roof. So no floor above. Below the ceiling, there is a sleeping loft on almost half of the area with a ridge height of about 1.60 m, so that's the ceiling height I prefer not to reduce further.

 

[Olof_f]

Add an extra joist between the rafters if you don't want to use battens; a cc measurement of 400 should work excellently with a 15 mm panel.

Yes, I'm considering such a solution.