Only a few weeks before the sedum roof is about to be laid the suppliers suddenly change their minds. “Yes, you will need an irrigation system in case there are long dry spells”. We suspect that this is another factor that applies more to sloping roofs, hence the original uncertainty. Sadly we will have to make a separate fitting for this now as the stainless plate we made for the ridge is already in place and covered with the first layer of felt. So an offcut of stainless has a stainless water pipe fitted to it.
A hole gets drilled in the roof and hey presto, one fitting in place ready for a 1/2″ fitting to hook a “leaky pipe” system up to it.
