Here are photos of my self-installed chimney cap. It came together
very well. I had to re-mortar the chimney top anyway for cracks, so I
topped off with extra mortar and inserted stainless bolts using a cardboard
template.
Once cured and hardened, fastening the nuts was a snap.
For the cap roof I used nylon lock nuts instead of your regular nuts-- all
stainless of course.
