Ceiling Attefall cc120, best option?

[Jonas Blom]

Hello
I need some advice.
I'm building an insulated "attefall" house and need help with the best solution for my ceiling.

I want as little construction height as possible since every centimeter in height counts in the loft. This without having issues with the "sagging" from the weight of the insulation.

Roof trusses cc120 with insulation and plastic.

These are the options I have considered.
1. Wood ceiling, tongued and grooved 95 or 120, in thickness 25mm, simply floorboards.
2. OSB + plasterboard
3. Furring strips cc30 + ceiling panel 12-15mm

Any other suggestions are welcome.
Thanks for a great forum

Jonas

 

[Liteavvarje]

1 120 between rafters works well, becomes sturdy like a complete sheet, binds all the timber together, but will increase and decrease in width measurements summer and winter, can then separate with gaps or come together and want to twist down into the joints, the roof becomes wavy
2 Well
3 Is good, normal execution in houses

 

[Jonas Blom]

1 120 between rafters works well, it becomes as steady as a whole pallet, binding all the timber together
but will increase and decrease in size in width summer and winter, can then separate with gaps or come together and want to twist down into the joints, the roof becomes wavy
2 Nja
3 Is good, normal execution in houses

Ok, thanks
It leans towards option 3.
Do you think it's possible to reduce the thickness of the sparse panel to 22mm?

 

[Liteavvarje]

Normally 28 more to screw in and sturdier between the rafters as there is 120 between, you don't lose much in ceiling height (only 6 mm) and won't have regrets later. With gles, the electrician can place all pipes and boxes under the plastic between the gles, plenty of space.

 

[Jonas Blom]

Normally 28, more to screw into and more stable between the rafters as it is 120 apart, you don't lose much ceiling height (only 6 mm) and you won't regret it later. With spacing, the electrician can lay all the pipes and boxes under the plastic between the spacings, plenty of room

Thanks.
6mm, yes many small streams in an attefall.

But I agree, better to do it right than regret it later.

The regulations on attefall should be reviewed so you can fit a loft without tying yourself in a knot.

Thanks for the answers
J

Normally 28, more to screw into and more stable between the rafters as it is 120 apart, you don't lose much ceiling height (only 6 mm) and you won't regret it later. With spacing, the electrician can lay all the pipes and boxes under the plastic between the spacings, plenty of room

Normally 28, more to screw into and more stable between the rafters as it is 120 apart, you don't lose much ceiling height (only 6 mm) and you won't regret it later. With spacing, the electrician can lay all the pipes and boxes under the plastic between the spacings, plenty of room