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Stesso

Install Subfloor (Decking)

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Frame an 8x12 shed: Intermediate lesson!

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What happens here

Install the subfloor (decking) using 3/4-inch plywood or OSB, such as AdvanTech brand. Before fastening, take a corner-to-corner measurement of your framed floor to ensure it is perfectly square; both diagonal measurements should be equal. Position the first sheet of plywood, tacking it in place with a few fasteners to align it correctly. It is crucial to stagger the seams of subsequent plywood sheets for structural integrity. Use an impact driver with 2-3/8 inch ring shank nails or screws to securely fasten the subfloor to the joists. After all sheets are laid, use a chalk line to mark any excess overhang and trim it with a circular saw. Finally, ensure the entire base is leveled in both directions, shimming as necessary, to prepare for wall framing.

Goal: Create a solid and level subfloor for the shed

Tools and materials

  • 3/4 inch Plywood or OSB AdvanTech — Subfloor material
  • Chalk Line — Marking straight lines for trimming
  • Circular Saw Makita — Trimming excess subfloor material
  • Impact Driver — Driving screws or ring shank nails
  • Tape Measure — Measuring for squareness and marking cuts
  • 2-3/8 inch Ring Shank Nails or Screws — Fastening subfloor to joists

What they say

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can even put three if you want. Here, I'm using a vent for the decking. You should take corner-to-corner measurements on your frame to make sure everything is correct. These measurements should be the same. You can set your plywood in place and add some nails so you can arrange it however you want. And then you have to make sure that your seams are separate. In this case, you'll be able to use your leftover piece on the other side with a slight overhang. With tongue and groove plywood , make sure you don't hit the tongue directly with the hammer or it will be difficult to install the second sheet. You can draw a square line and cut off the excess part from both sides. For fasteners, you can use screws or ring shank nails. In this case, I used screws , but either is good. The nails are definitely sharp. Once the deck is in place , make sure you level your base so

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