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I have started working on loft however facing following problem. I'm new to doing loft floor work.

Briefing : Old part of house have 50w x 70h joist at 300mm space. New extension have 50w x 170h joist at 600mm space. Trying to leveling old to putting additional joist 50w x 100h joist at 90* to existing old joist at 600mm space.

Semi-detached Bunglow : - Common Wall : Bedroom 1 : Bedroom 2 : Extension : Outside Wall

Old Area : 7.8 X 8 Meter

1. Can I fix 50x100 joist at 90 degree on top of 50x70.
- at space 600mm will be ok
- new joist end should be engaged in a common wall to support
- How can i remove brick from wall
- Can i Screw fix on existing joist without engaging to wall
- What joist material should i use...Swan Treated Regularised C16
- What other lightweight joist timber i can buy

Sorry to ask so many question but It seems really difficult to find answers for above query and its stopping me to carryon doing work when so many questions coming in my mind.

I'm not earning decent money so can not afford to go externally for help

Your help will be highly appriciated.

Thank you very much in advanced.

Regards,
Mitul Patel

mittulgpatel wrote:It seems really difficult to find answers for above query and its stopping me to carryon doing work when so many questions coming in my mind.

What do the drawings/specification (if any) state? Why not ask the BCO?