I'm thinking aabout replacing the carpet in the hallways with laminate
floors or tile to handle high traffic.
Without the carepet and pad, I can tell the the bathroom and and bedroom
doors will have a large gap underneath.
Is there something made to fill this gap other than replacing all the doors?

I was also considering getting a commerical-type carpet for the
halls, but I thought having more than one kind of carpet in house would look
odd since I still want super plush and soft capets in the living room and
bedrooms.
Has anyone tried multiple carpets in a single home?