Install Double Bottom Plates
At 2:25 in
Building Addition Walls - INSANE Backyard Pt 5
What happens here
Begin by placing a pressure-treated 2x4 lumber piece, which serves as the first bottom plate, along one of the snapped chalk lines. Before placing the second bottom plate, unroll a pink sill sealer (foam gasket) on top of the first plate, ensuring it is aligned to prevent moisture transfer. Cut the bottom plates to the correct length using a circular saw. Position the second pressure-treated 2x4 directly on top of the sill sealer. Both plates should be aligned with the chalk lines and pass over the wet-set J-bolts. Use a hammer drill to create pilot holes for concrete screws, and then drive the concrete screws in with an impact driver to temporarily secure the plates. This initial fastening helps align the plates precisely before the J-bolts are tightened down.
Goal: Securely attach the pressure-treated double bottom plates to the concrete slab.
Tools and materials
- Circular Saw DeWalt — Cutting the pressure-treated lumber to length
- Hammer Drill Makita — Drilling pilot holes into the concrete through the wood
- Impact Driver DeWalt — Driving concrete screws into the pilot holes
- Wrench — Tightening the nuts on the J-bolts
- Concrete Screws — Temporarily securing and aligning the bottom plates
- J-Bolts N/A — Anchoring the bottom plates to the concrete slab
- Pressure-Treated Lumber — Forming the double bottom plate for the walls
- Sill Sealer — Providing a moisture and air barrier between the wood and concrete
- Washers — Used with nuts on J-bolts to distribute pressure
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