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Plywood or OSB decking, 23/32" or 3/4" (per 4x8 sheet)

Its weight

The table
74 lb a sheetThe sources give 67 to 80 lb.
Loose volume
0.095 cubic yards a sheet
How it was chosen
APA TT-019 gives 2.2 to 2.5 lb a square foot (70 to 80 lb a sheet); Roof Observations gives 23/32" APA plywood 67 lb, 3/4" 70 lb, OSB 77 to 80 lb. 74 lb is the figure. Volume at Seattle's 775 lb a cubic yard for plywood pieces.

Your figure

None: estimates use the table's.

Give your own figure
For each square of roof, or each sheet of decking.
Loose, as it lands in the dumpster, for each square or each sheet.
Your scale tickets, your hauler's figures: what a reader would check it against.

3 sources

  1. Tech Note GE-1: Product Weights (weights of building materials for dead loads, (c) 2021)

    Boise Cascade Wood Products; rows marked (1) cite ASCE 7-16 Table C3.1-1a, sheathing rows (3) cite APA EWS TT-019 (1998) · estimating guide · read 2026-10-23

    SHEATHING: "23/32" or 3/4" Plywood - OSB(3) 2.2 - 2.5" Footnote (1): "Minimum Design Loads for Buildings and Other Structures, ASCE 7-16, Table C3.1-1a." Values are pounds per square foot.

    The document An archived copy

  2. Plywood Weights, OSB Weights & More: Calculator + Charts (Jack Gray, RRO; updated 12/16/2025)

    Roof Observations · trade publication · read 2026-10-23

    Table 2 (lb per 4'x8' sheet): APA Plywood Std. 23/32" 67 lb, 3/4" 70 lb; OSB 23/32" 77 lb, 3/4" 80 lb.

    The document An archived copy

  3. General Measurement Standards and Reporting Guidelines: Volume and Weight Conversion Factors for Recyclables

    City of Seattle, Seattle Public Utilities · government · read 2026-10-23

    "Plywood sheet, pieces | one cubic yard | 775 | Tellus" Footnote 1: "Disclaimer: This table is for general guidance only. Not for contract payment."

    The document An archived copy