Been doing some damp proof work for a company for a while,usually using s n c.traditional method.used their modern system for the first time yesterday and today.hack off.then drill and inject from the inside.then fix a semi flexible one metre high plastic type bubble wrap along the length of the hack off.you drill through the plastic and hammer in fixings similar to aqua panel mushroom shape fixings with a rubber gromit that seals up the drill hole.then hardwall over the top then skim.anyone else used this method?its like trying to hardwall over a plastic curtain,flexing like a bugger whilst working on it.