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Perimeter excluding house attachment side
1. Deck Area: Length × Width gives the square footage of your deck surface. This is the foundation of every material estimate.
2. Decking Boards: Area × (1 + waste factor) × cost per sq ft. The waste factor accounts for off-cuts, bad boards, and layout patterns : typically 5-15%.
3. Framing / Substructure: Joists, beams, posts, and ledger boards are estimated at approximately 100% of the deck area in material coverage. Area × framing cost per sq ft.
4. Railing: Linear feet of railing × cost per linear foot for the selected railing type. Does not include the house-attachment side.
5. Hardware & Fasteners: Screws, joist hangers, post anchors, and connectors are estimated at ~5% of the combined decking + framing cost.
6. Total: Sum of all above. Note: this covers materials only. Labor typically adds 50-100% on top depending on your region and contractor.