How to fix this wallplate to this very uneven crumbly wall for hangers and joists and a sturdy dance floor?
Photo at
About 2.3 metre x 2.3 meter Cracky stone and old lime mortar / powder
Over joists will be ply and EDPM and occassionally a lot of people.
It's the old house's water tower where water was pumped up by a wheel or ram in the stream, Victorian technology!
Maybe pour foam or lime or concrete in the gap behind the wall plates so they are screwed into something solid.
How many M12 200m bolts per wall plate, will they sty in or are plastic rawl plugs needed, or epoxy tubes?
These bolts?
Advice please, I'm lining them up with 2 thinner bolts, but hope to decide on final fixings this weekend
George
PS