Secure by nailing the flashing to the roof.
How to install metal roofing around existing skylights.
Flashing s must be installed from the bottom lowest point to the top highest point of skylight.
Repeat to install the flashing to all sides of the skylight frame.
Then fold the tabs on all sides of the skylight and screw them down.
The bottom sill will be a u shaped metal piece that slips over the bottom of the skylight.
This underlayment will direct any water that may get through the metal flashing onto the roofing felt.
I had a velux certified installer replace an existing skylight that was cracked.
If you have to replace shingles around a skylight examine the old flashing.
Contractor larry landers demonstrates how to install roofing shingles around skylights.
Once the metal flashings are ready place the pieces between the roof and skylight above the roof and under the skylight.
If the skylights are curbed rather than flush to the roof yes a metal roof can be flashed around them and metal roofing manufacturers should all have instructions for doing so.
One thing i do suggest if the skylights are 10 years old i suggest replacing them.
Install from the bottom up lapping each piece on top of the lower one.
This ensures that the overlap at the seams face downwards.
Nail it to the side edges of the frame or curb of the skylight.
The roofing felt and step flashing helps keep water from leaking around the skylight.