Hello everyone, Ian here. Amy asked me to write a brief overview of how to install a subfloor. So, not only do I complete our projects, but now I right about them too. I see how it is! Anyway, below I’ve outlined the first steps of installing a subfloor assuming the old flooring has been removed.
– ¾” tongue and groove subfloor plywood
– Circular saw
– Jig saw
– Tape measure
– laser level (optional but helpful)
– Impact driver
– corrosion resistant screws
– Subfloor construction adhesive
- Make sure that all of the old nails and adhesive is removed.
- Test fit a piece of the subfloor near the center of the room to try and determine the best starting point. This will ensure that the subfloor will be supported adequately on the ends of the sheet if there is old flooring adjacent to it. If not, add a 2”x4” down the joist to give the plywood something to support it.
- Be sure to lay down the plywood so that the grain is perpendicular to the floor joists.
- After test fitting and determining your starting point, cut the piece to length if necessary and test if it fits.
- Apply a ¼” strip of the liquid nails adhesive to the top of the joists where the first piece will be adhered. Do not skip this step, it makes the subfloor significantly more stable.
- Put the plywood in place and prepare to screw it in permanently. Helpful hints: I used my vertical laser level to put a line on the plywood at the center of the joist to make finding the centers of the joists easier. It is also helpful to predrill your holes so you do not split your plywood. AlsoScrews should be placed 6” around the perimeter of the plywood and every 12” on the center joists.
- Next I added the next piece of plywood to the length of the room before adding to the T&G sides. Make sure to leave a 1/16” to an 1/8” of room lengthwise for the wood to expand in different seasons.
- Repeat with the next sheets except for adding adhesive to the groove of the T&G and tapping the board into place with a rubber mallet.
And that’s it! Feel free to leave a comment below if you have any questions. Have fun flooring 🙂