Roof pitch too shallow for velux

Joined
11 Feb 2021
Messages
47
Reaction score
1
Country
United Kingdom
Hello All, we are undertaking a rear extension and are in a bit of a situation regarding the roof. The builder has put in the header and rafters but there is a 12 degree pitch (2.5 in 12 inches) so we're struggling to get the pitch to fit a velux which I think requires a 15 degree pitch.
No battens or roof tiles have been installed yet. The builder is reluctant to re-install the header/beams and has suggested we could use timber firrings on top of the roof beams to give us the 15 degree pitch we need. Would this be an acceptable solution? I think the firrings will need to be in the region of 180mm or so to give us the pitch. The roof run for the extension is 3100mm. Thanks
 
Sponsored Links
Thanks Woody. The cost for these upstands (almost as much as the velux itself) are quite prohibitive. Also we are trying to retain a flush finish if possible. Would the firrings proposal work as this would increase the pitch for the whole roof?
 
Why did your poxy plan drawer design a roof and rooflights that don't work together?

If your builder was a bit clued up, he could make the upstand, but otherwise yes furrings can work if properly fitted - they may well need a ply or steel gusset.
 
Sponsored Links
you're right Woody. The architect has been a real let down. We're struggling through the build with a lot of to'ing and fro'ing with BC. Thanks for the advice.
 
The rafters are unfortunately already installed and is currently providing a roof pitch of 12 degrees. The firings will be retro-fitted to these rafters and tied in as Woody has suggested with gussets. The fall on the firings will be aligned to provide the 15 degree pitch for a Velux.
 
I don’t disagree Freddie. It’s been a struggle to get this far - weeks if no work, loads of stuff having to be re-worked. Unfortunately I have too much invested to cut my losses.
 
You have to ask yourself do you want to move forward with someone who dose not understand the basics.
 

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.


Are you a trade or supplier? You can create your listing free at DIYnot Local

 
Sponsored Links
Back
Top