Double Dorma Loft Conversion - Noggins Required?

[Daytonamick]

Hi There

After many months I have finished the outside of my double dorma extension. I am now ready to install the celotex in the ceiling and dorma frame.

I have installed a couple of lengths but then realised that I haven't installed noggins to the roof (6 x 4) timbers - do I really, really need to fit noggins and if so what size and position (it's a cold flat roof so 50mm above the 100mm celotex will be for air flow).

Thanks for your help

Untitled

• Daytonamick
• 12 Nov 2009
• 2

 

[Chri5]

What do the plans say ? don't they mention stepped noggins every xyz ?

 

[noseall]

If you are referring to mid-span bracings then you would need to fix these as a structural requirement.

 

[Daytonamick]

Thanks for the responses. The plans do not mention mid-span bracing or noggins.

Would herringbone straps do the job ... I realise they should have been fitted before the flat roof was installed but I presume I can install them at the top of the joists fixed mid way along the joists.

http://www.screwfix.com/prods/58265/Building/Builders-Metalwork/Herringbone-Strap-400mm-Pack-of-25