joist support

We recently got a dormer installed on our roof but during construction, they noticed that the roofing joist on the right side it is on ends early. The problem now is that the cross beam they installed is quite far inward. This causes there to be only about a cm of clearance between the beam and...

I'm currently in the process of converting my loft in to a 4th bedroom. I've replaced the joists with 7x3" C16 spaced 400 apart. The majority of these are supported by a supporting wall running through 3/4 of the middle of the property. My question is: Can I use two non supporting walls...