Doesn't the door manufacturer that is supplying the prehung solid core doors specify how many hinges they provide on the various door heights?

They do but I want to make sure what they are giving me is the best choice.

I've used Masonite Capri solid core 80" and 96" doors in builds. Never pre-hung. Three heavy-duty decorative hinges were always sufficient.

But I would check that the hinges are true loose-pin, so the doors can be easily removed for trimming as the house settles or to ease moving day concerns. Some loose-pin hinges are lubricated for life with materials that make removing the pin impossible. And you don't want that stuff on your bare skin!

We have similarly heavy 7' doors (many 36" wide). They have three hinges. Our french doors with double glazing have four hinges. Our stained wood entry door is an 8' archtop (42" wide). It has four hinges. House is 17 years old.

Thank you all for that information. Will update what we go with when the order is in.

Make sure the screws that you use in your hinges are long enough. The screws that came with my hinges were not long enough to hold the heavy tru stile doors in my last house and we used longer screws.

I think the screws come short on purpose so they dont stick out of the prehung frame for shipping and it is expected to replace at least some of them.