Thanks to some local yoofs I have to replace a broken downpipe at work. Because everything has been bonded from the gutter to the floor I am uncertain as to some points concerning the repair.
1. The existing joints on the downpipe have been bonded and I can't get anything to come apart without cutting. Is bonding necessary when I put it back together?
2. I think that I have read that I need to leave some room for expansion of the pipe? How does that work if the joints are all bonded? Having said that, the pipe does not go into a drain so I suppose the bottom of the pipe could be left an inch short of the floor?
3. This is the real killer for me (there is a huge hole in my knowledge) but I don't know what wall fixings to use. The wall is rendered breeze block and what size/type/rawl plugs/screws should I use for the pipe clips and what size drill bit compared to the size of rawl plug? Presumably, I should use stainless steel screws?
4. Hmmm, breeze block. Do I even need rawl plugs? Maybe I could use some hex washer head self tapping(?) screws?
As ever, thanks in advance for all replies and advice.