This is my first time installing a wooden floor, its for the workshop in a double garage and will be contructed of 1.5" x 8" pine T/G boards. After compiling a list of ideas on floor installation from various sources I wanted to run my final plan via some of you with more experience than I before beginning.
The pine floor will be layed over a 20 y/o existing concrete slab in a cold weather climate (ontario, Canada). Firstly I'm putting down a 6mm vapor barrier then a frame around the perimeter of the room using 8" sleepers ripped to level out the slope in the existing concrete floor. Sleepers will then be layed at 16" centres between the frame which will also be ripped to level out the slope of the concrete. I'll place shims every 12" where the sleepers don't quite meet with the concrete and use string line with level to get a level surface as the sleepers are being layed.
Apparently blocking is not necessary but can aid during the construction process so I'll use only if required.
Is it absolutely necessary to tapcon the sleepers to the concrete? There will be some fairly heavy equipment placed on the floor when complete.
Will the shims stay in place by themselves or do they require glueing to the bottom of the sleepers.
Would it be better to leave a small gap between the sleepers and concrete along the entire length of each sleeper for shiming or should I attempt to rip the sleepers to fit as snug as possible to the concrete and resting directly on the concrete as much as possible.
p.s I have not decided on insulation as yet, it depends on the final cost.