I need to replace a roof hatch. It will become part of a small bedroom. I need to find a good vendor for the hatch and need some ideas about the ladder. Does the ladder need to be attached? Can I have ...

Roof access is straight up though a hatch-way. A steel ladder was in the house, but not installed. The ladder has angle brackets protruding from one end at 90′ to the rails, parallel to rungs. I am ...