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 ...

Lee Wallender is a home improvement writer of nearly 20 years and specializes in home remodeling, repair and maintenance. Sami Allen is the managing editor at Forbes Home, with over seven years of ...