I have single story 2 m wide flat-roof extension running down the side of my end terrace. I've put a pitched roof on it and also extended it forwards 30cm (or so) to meet the front face of the house. So I need to extend some of the 5x2 ceiling joists a few inches - they used to rest on a UPVC porch at the front (now just hanging in mid air). Do I:
- extend the joists with 5x2/timber connectors into the inner block wall of the new front cavity wall - issues with heat loss regulation, and those boot things for the ends of joists are not really retro fit.
- put a 9x2 purlin across the 2 m width of the extension and hang the joists from this - awkward.
- extend the joists with 5x2/timber connectors and hang them from the new inner block wall of the new front cavity wall with masonary hangers.
I'd really appreciate some advice. Thank you.