Skip to main content
Back to Glossary
Materials & Specificationsaka: plywood sheathingaka: plywood panel

Plywood

In Plain English

A strong wood panel made of thin glued layers used for sheathing, subfloors, and formwork.

Definition

Plywood is a structural panel made from thin wood veneers (plies) glued together with alternating grain directions for dimensional stability and strength. It is used for wall and roof sheathing, subfloors, concrete formwork, and finish applications. Plywood grades range from structural sheathing (CDX) to finish-quality hardwood veneer panels.

Why It Matters in Bidding

Plywood is a volatile commodity line item, and grade and thickness callouts in the specs directly affect both price and quantity in a framing or sheathing takeoff. Because lumber pricing swings sharply, estimators often note quote validity dates and may request escalation language, since a bid held open during a price spike can wipe out the framing margin.

Example

Doing a sheathing takeoff, an estimator counts 4x8 sheets of 5/8-inch CDX for the roof deck, adds a 10 percent waste factor for cuts and hips, and flags the lumber price as valid for 30 days.

Related Terms

Oriented Strand BoardSheathingEngineered WoodDimensional Lumber

Frequently Asked Questions

Calculate the total wall, roof, or floor area, divide by 32 square feet per 4x8 sheet, then add a waste factor, commonly 10 to 15 percent for cuts, openings, and hips. Confirm the spec thickness and grade, and price fasteners and any required clips or blocking separately.
Structural sheathing is typically CDX or APA-rated panels with an exposure rating suited to weather during construction. The face/back veneer grades and span rating must match the drawings. Substituting OSB or a lower grade without approval can trigger rejection, so estimators price exactly what the specs and the panel stamp require.
Plywood and OSB are commodities with prices that move weekly, so a number carried in a bid held open for months may no longer reflect supplier cost. Estimators protect margin with quote expiration dates, locked supplier pricing, or escalation clauses on lumber-heavy projects to avoid absorbing market spikes.

Need more than definitions?

Get AI-powered bid alerts, automated form filling, and proposal drafting.

Start Free Trial

© 2026 ConstructionBids.ai — A LaderaLabs Product