What size Velux Roof Window can I fit?

[kwackerman]

Hi everyone, stumbled across this excellent forum yesterday and now hope to pick your brains?

I want to fit a veleux roof window but I want some reassurances that the exsisting roof rafters are going to be strong enough to take the weight of the window I wish to fit. The rafters are 3x2 and spaced approx 14 inches apart. The window I want to fit is a 78 (w)x118 (h) centre pivot.

Will this be ok?

Thanks for any help

Andy

 

[^woody^]

The window is not that much heavier than the tiles it will replace.

The main issue is the cutting of a rafter or two, and so the loads from these are just transfered by doubling up the rafters either side of the window

 

[kwackerman]

Thanks for your info woody

Cheers

 

[Shytalkz]

Don't forget the trimmed rafters need support as well: single trimmer top and bottom of same section size as rafters will suffice. Positioning as per Velux details