I have recently removed the plasterboard off my vaulted single storey lean-to extension to install some insulation and have discovered that all of the rafters where supported on the wall plate at the eaves are damp.
Having done some investigation it looks like the felt has sagged at the eaves/facia board due to the lack of felt support.
To rectify the problem I am thinking of installing a plastic eaves support tray. Can anyone tell me how I would go about lifting the bottom row of eaves tiles to retro fit an eaves tray and also how I would fix them back down after.
The slates are fibre cement slates.