[Canabarrybarb]

I did it myself with a kit purchased from a local big box hardware store. Kit seems to be high quality and it has worked fine for several years now.

I bought special carborundum blades for my jig saw since cutting through shingles is hard work.

The hard part is working in the tight spaces in the attic. Although it is not a difficult job, the fun of working in the insulation over a drywall ceiling makes hiring someone almost worth it.