I would like to re-route the upstairs bathroom waste pipes (40mm and 34mm) through a tiled roof below. I know that there are flashing kits for 110mm soil pipes, but can I get a similar type flashing kit for a 40mm or 50mm waste pipe?
The pipes currently join to the soil stack at 90deg, right where the new conservatory apex roof spar is planned to be sighted. I fear that this will be too difficult to seal and cause problems in the future. I would be less worried if the conservatory company just had to flash around the 110mm soil pipe.
Anyone have any ideas on how to do this in a professional manner?
Regards Brian