Commented: vacuum help pleaseI wish I could answer your question...but in my opinion what 'not' to buy would be a full size Dyson..clunky and clutsy...I don't like mine at all...it sucks in more ways than one..
Commented: What material is this?It looks as though there used to be tile there, and that's the old mastic/glue. I would want to remove it all and replace with new drywall.