DIY Doctor

modifying small kitchen roof in old cottage

Postby merlin1244 » Fri May 20, 2011 10:06 pm

I have taken down the ceiling in a small kitchen in a cottage bungalow with a view to opening up the void to create a feeling of space and to put a roof window in. The kitchen roof can best be descried as a ‘lean too affair’. The joists supporting the roof are 8 feet long by 2 ½ x 2 ¼ and there are 10 of them at 16 inch intervals. They angle up at about 30 degrees. They are supported by one long cross beam which sits on two other beams underneath running at right angles. The tiles are very new and are man made. My first impression is the joists are not thick enough and were obviously put in when the house was built (1895) . I would have preferred them to be 4 x 2. I am wondering if I put in another 8 joists ( 4 x 2) in between the others would this allow me to take out the cross beam and the other two beams sitting underneath?
Rank: Labourer
Progress to next rank:
Posts: 1
Joined: Fri May 20, 2011 9:58 pm


DIY asbestos test kits

Postby stoneyboy » Fri May 27, 2011 5:29 pm

As a general guide 100x50 rafters at 400 centres should be OK over a clear span of 2.4m. If you are fitting a roof window you should double up the rafters either side of the window.
Rank: Project Manager
Posts: 4051
Joined: Wed Dec 10, 2008 6:44 pm

Display posts from previous
Sort by
Order by

  • DIY How to Project Guides
  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!

  • Related Topics