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Leveling the Floor and Installing the Subfloor

Bob meets lead carpenter Connor McKenna from Thorough Construction, who is working with the original floor joists in preparation for the hardwood floors. Bob remarks again on the hig-quality craftmanship of the original builders, but notes that the floor joists have been chopped up and hacked through for wiring, plumbing, or gas jobs over the years. McKenna explains that sistering the joists, or applying additional lumber to strengthen the existing timbers, will create a sturdy base and allow them to recreate a level floor. A laser level is used to project a level line throughout the apartment that will be followed for leveling all the new floors. McKenna applies panel adhesive to the tops of the new, sistered joists before laying four-by-eight sheets of Georgia-Pacific Plytanium Sturdifloor on top. This is a tongue-and-groove subfloor that is strong enough to serve as the only layer under hardwood flooring. Once affixed and locked in place, the Plytanium is nailed to the joists with traditional deck screws, never drywall screws, to create a stronger, better, quieter installation for the hardwood floors that will follow. More information