Can anyone provide me any engineering advice if there is a law or hazard on tiling over my condo apartment rebar enforced cement balcony? If I seal the cement using cement sealer, apply layer of roll-on rubber membrane, mortar down 5/8" cement board, making sure it is properly slanted for drainage, then tile over top, would this be enough to prevent the existing skim coat cement membrane from creating any rusting of the rebar below in my patio? I would like to beautify this deck, but do not want to create a safety hazard or want to remove if the "membrane' needs inspection. I live on Vancouver Island, British Columbia. Thank you.