Installing a Deck - Framing and Decking

Confirm permit rules and setbacks. Choose deck size and height, and decide if it will be attached or freestanding.

Set batter boards outside the deck corners and run string lines. Square the layout with the 3-4-5 method.

Dig to frost depth and add a gravel base. Set tube forms and pour concrete. Set post anchors while the concrete is wet.

Install posts in standoff bases and plumb them. Build beams from double boards and set them on the posts.

If the deck attaches to the house, remove siding and install a flashed ledger with structural screws. Skip this step for freestanding decks.

Install rim joists to form the deck outline. Square the frame by checking both diagonals.

Install joists at 16 in on center using hangers. Add blocking at mid span if required.

Apply butyl joist tape to all joists and rims to reduce rot.

Lay boards with consistent spacing. Snap a chalk line to keep the run straight. Cut the overhang in one pass and seal cut ends.

Install fascia and railings if required. Let pressure treated lumber dry before staining.