What is the best way to do a basement renovation?

Updated: Nov. 23, 2020

I finished a basement for a contractor and what we did was put tar paper on the concrete walls the left about 3/4 to an inch of air space than a 2x4 wall I think 16 on centre and used pink fibreglass insulation with vapour barrier break under the bottom plate and over the insulation on the interior warm side and then drywall over top, the vapour didn't end up being taped but maybe was acousticall sealant by the insulation company while they put that part up. what I'm asking is this ok because by all that I have read now that that isn't a good combo in a basement and wasn't sure if the tar paper even really did anything or its an old practice the contractor was used to doing?

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