Pry, chisel and scrape off old metal flashings and roofing cement. Before you do anything, get your ladder, roof brackets and safety harness set up so you can work safely and efficiently on the roof.

First, remove the skylight’s counterflashing. On some units, you have to remove the whole glass frame. On other models, you simply unscrew a metal channel from the curb. Next, pry off the old shingles ...