Hi,

Well it's fall in Toronto Canada with 50% indoor relative humidy and it's time to install. I have final questions before I start my 3/4" White Oak flooring install over 3/4" OSB flooring. There is a basement with standard 16" joint spacing.

-The indoor humidity is a high of 65% in the summer, and a low of 30% in the winter. Right now it's about 50% indoors. Is this the 'ideal' time to install? (I'm asking becuase contractors keep telling me they install all year around with no complaints).

-The flooring in the house used to have tile through most of it. It seems that the floors have already been re-enforced with screws every 6-8" or so. I'm not sure if I should be adding even more screws. NOTE: When I walk on the subfloor, it does creek and feel a bit hallow. The subfloor actually looks pretty good and visually looks like it has no big dips or defects. How should I secure the sub floor down? Will there be a difference in how the subfloor floor 'feels' after it has been screwed down?

-What types of screws should I use? I heard people meantion black drywall screws. Another mentioned wood screws.. the kind where there is no threading on the upper portion. I dont know which screws to buy and how long they should be.

-Can I use a table saw rather than a circular arm saw? I have a nice 10" Diablo blad, but I'm reading some people saying the circular saw makes things easier.. what do you recommend?
Thanks for all the help!

Hardwood can be installed any time of year. Just be sure to acclimate the wood for about a week. Secure the subfloor with some deck screws about 2" long. Not sure what you want to use the table saw for, if it is to rip boards that you are installing than yes it is the way to go.