You need to pull the shingles off your roof transport those shingles away from your home and dispose of them legally.
Removing old roof slates.
Each of these stages requires different resources and involves its own kinds of costs.
Work from the top bottom and sides to save back muscles.
See my website link below for more roofing help http www fixmyroof co uk videos and guides pitched roof repair a slate roof this video shows not only how.
Remove the old shingles with tear off shovels.
Limit cleaning to removing organic debris and delaminated slate flakes from valleys snow guards gutters and the area behind the chimney.
The process for removing a slate roof resembles removing any kind of roof.
A vinyl leaf rake can clean harder to reach spots.
Use heavy rubber gloves to scoop up material in areas you can safely reach.