Wall-type legends are where drywall takeoff either works or quietly undercounts.
Drywall takeoff is an assembly problem, not a linear-feet problem. BuildBid reads the wall-type legend, matches every wall on the plan to its assembly, and breaks the quantity out by layer: framing, insulation, board (by thickness and type), finish level.
Openings are deducted correctly by default. Doors, windows, and wall-mounted equipment are pulled from the schedule and subtracted from the wall area — with the option to keep the deduction off for shell-and-core pricing.
Ceilings are handled as their own scope. Drop-grid, hard-lid, soffit, and bulkhead quantities land separately with the assembly type pulled from the reflected ceiling plan.