Pre Hung door bottom clearance

spring3100

I have three 32 by 78 interior doors to install in my basement.

Rough Openings are 34 by 80 1/2

There exists no subflooring yet,only concrete.

My question is,I am looking to install a dricore subfloor,which is 7/8ths thick,after that how much clearance will I have to put finished floor on top before contact with the bottom of the door becomes an issue?

Thanks in advance for your inputs.

abracaboom

1 inch space between the floor and the bottom of the door is the standard.

BigJim

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Jim

titanoman

Install the door with pieces of sub and finish floor stacked under the jamb.