Scenario is vertical boiler flue through a very shallow roof with pan tiles. The roof has breathable felt. Inevitably rain found its way onto the felt and through the split in the felt, ran down the flue pipe and into the boiler. The boiler has just been replaced and the roof needs sealing properly. Im sure there is a way to create a seal around the felt and form an up stand / tube which can go around the flue. The lead slate can then sit over this up-stand as well and do its normal job over the tiles. Ive seen this used before but no googling will give me the results i need. Can anyone please point me in the right direction
