Looks like a fun project. For the damp, check this stuff out. http://compare.ebay.co.uk/like/130497379485?var=lv&var=sbar&_lwgsi=y&cbt=y&device=c&adtype=pla&crdt=0&ff3=1&ff11=ICEP3.0.0&ff12=67&ff13=80&ff14=66
Expensive but if you follow the instructions it dries solid inside your walls and solves the damp problem.
Daz
@Dazaa started
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Looks like a fun project.
For the damp, check this stuff out.
http://compare.ebay.co.uk/like/130497379485?var=lv&var=sbar&_lwgsi=y&cbt=y&device=c&adtype=pla&crdt=0&ff3=1&ff11=ICEP3.0.0&ff12=67&ff13=80&ff14=66
Expensive but if you follow the instructions it dries solid inside your walls and solves the damp problem.
Daz