Board, tape, and finish — Level 4 to Level 5.
Pilrs reads partition plans, ceiling plans, and partition schedules to quantify gypsum board SF by layer, metal stud LF, track LF, tape and mud by Level (3, 4, 5), corner bead LF, and insulation within the partition.
Drywall estimating looks simple — square feet of partition times two sides — but the actual scope is layered. A commercial project might have 18-24 different partition types on the partition schedule, each with a unique UL assembly: 5/8" Type X each side over 3-5/8" 25-gauge studs (UL U419), or double-layer 5/8" Type X for 2-hour rating (UL U465), or shaft wall systems with CT studs and shaft liner. Each partition has different board count, stud spec, insulation, and labor productivity.
The takeoff bottleneck is partition reconciliation. Each wall segment on the partition plan carries a type tag (P1, P2, etc.) matching a row in the partition schedule. The schedule lists stud size and gauge, board layers, insulation, rating, and UL assembly number. A 60,000 SF commercial floor with 18 partition types and 1,200 LF of total wall requires reconciling every wall segment to its partition type before SF, stud LF, and insulation can be calculated. Manual reconciliation runs 6-10 hours and miscounts 5-8% of wall segments.
Finish level drift is the silent killer. The finish schedule specifies Level 4 throughout — except Level 5 in lobby, conference rooms, and critical-lighting zones. Level 5 adds a skim coat over Level 4, increasing labor by 20-30% and material by 40-50% in those rooms. Estimators who apply flat Level 4 across the project underbid the high-end rooms and lose $0.45-0.85 per SF on Level 5 zones — typically $4,000-12,000 per commercial floor.
UL U419: 1-hour, single layer 5/8" Type X each side, 3-5/8" 25-gauge studs at 24" o.c. UL U465: 2-hour, double layer Type X each side, same stud. UL U438: shaft wall, 1-hour, 1" shaft liner + 5/8" Type X. Each assembly has different board count, stud spec, and labor productivity. Misidentify one partition type and labor is off by 30-50% on those walls.
25-gauge for partition heights up to 14 ft (most non-load-bearing partitions). 20-gauge for 14-20 ft. 18-gauge for 20-26 ft and structural use. 16-gauge for load-bearing. A 16-ft tall corridor wall in a warehouse needs 20-gauge — using 25-gauge per the spreadsheet template causes deflection failures and field rework.
GA-214 defines Level 4 as standard tape-and-mud (ready for paint primer). Level 5 adds a skim coat of joint compound over the entire surface for critical lighting conditions. The spec might call out "Level 5 in entry lobby and conference rooms" while finish schedule says "paint per finish schedule throughout." Reconciling that ambiguity manually misses Level 5 zones in 35% of bids.
Drywall soffits and bulkheads have three painted faces (both vertical sides plus the underside) — but the framing crew sees only one wall. A 200 LF soffit at 12-inch deep is 200 SF underside + 400 SF vertical faces = 600 SF of board + finish. Manual takeoffs measure soffit perimeter and miss the underside, undercutting board by 33%.
Shaft walls (elevator, stair, mech chase) use 2.5" CT or CH studs, 1" shaft liner, and 5/8" Type X gypsum on the occupant side. Different fasteners (S-12 vs S-10), different stud installation (one side at a time), different labor productivity (shaft walls take 1.4x standard partition time). Estimators who treat shaft walls as standard partitions undercut by 40%.
Outside corners need corner bead at $0.85/LF; inside corners need tape only. Window and door openings each need corner bead at the head and jambs (typically 17 LF per opening). A commercial floor with 80 doors and 60 windows has 2,380 LF of corner bead at $0.85 = $2,023 — frequently missed when estimators count corners by hand and miss 15-20%.
The line items that slip between plan sheets — and the dollars that leave with them.
STC-rated partitions require acoustic sealant at top and bottom track, around penetrations, and at perimeter joints — $0.45/LF. On a 200 LF STC partition, $180 of often-missed material plus 4 hours of labor.
GA-216 requires control joints in walls over 30 ft (interior) or 50 ft (exterior). Drywall control joints at $14/LF installed. A 200-LF lobby wall needs 6 control joints at $84 each = $504 plus consideration to maintain rating across the joint.
Tall partitions over 14 ft need slip track at the top to allow structural deflection. Slip track plus stud cap plus deflection clip at $4.20/LF on a 100-LF tall wall is $420 of often-missed material.
Tenant improvement work in existing space needs demo drywall removal and surrounding patching — typically 8-15% of new drywall scope value. Frequently absorbed when bid as "new construction only."
IBC 2024 fire-rated assembly requirements are tightening for hotel, hospital, and multi-family projects, increasing partition complexity. Combined with the shift to taller commercial floors (12-16 ft typical) requiring heavier-gauge studs, plus the STC 50+ requirements for hotel and condo construction, every commercial drywall bid in 2025-2026 has 18-25% more scope per SF than 2020. Takeoff speed has gone from competitive advantage to existential.
Drywall takeoffs fail on partition identification. A modern commercial plan shows 15 or 20 different partition types on the partition schedule, each with a unique UL assembly number or a custom callout ("5/8" GWB each side of 6" 20-gauge stud with R-19 batt, STC 55"). Each partition has a unique board count (one side, two sides, or fully rated double layer), stud spec, insulation, and labor productivity. A takeoff that treats all partitions as "8-foot-tall wall" is wrong in 15 different directions.
Finish level is the second major failure. The finish schedule specifies Level 4 throughout unless otherwise noted — except Level 5 is required in the entrance lobby, the executive conference room, and anywhere with critical wall-grazing lighting. A Level 5 skim coat adds 20 to 30% labor and 40 to 50% finishing material to those rooms. Estimators who apply a flat Level 4 across the project underbid the lobby and lose money.
Ceiling plans and soffits are the third scope trap. A reflected ceiling plan shows acoustic tile ceilings at 9 feet and drywall soffits at 10 feet, with furred bulkheads at every column. The drywall soffits need framing, board, tape, and finish on three visible sides. Pilrs reads the RCP and pulls every drywall ceiling, soffit, and bulkhead into the takeoff — not just the vertical walls.
Pilrs reads partition plans, partition schedules, ceiling plans, and wall sections to quantify gypsum board SF per partition type, metal stud and track LF, tape and mud by Level, corner bead by LF, control joints, acoustic insulation, and shaft wall systems. Every partition type from the schedule is matched to its UL assembly for correct labor productivity.
Every partition measured and tagged by schedule callout. Board count per layer (one, two, or three layer assemblies) applied.
Stud gauge (25, 20, 18, 16) and size (3 5/8" to 6") counted per LF with top and bottom track. Spacing (16" or 24" o.c.) applied per assembly.
Level 1 through 5 finishes per GA-214. Labor and material separated by level with Level 5 skim coat added per finish schedule callout.
Outside corners, bullnose, L-trim, and expansion control joints measured in LF. Tear-away bead at door and window openings.
Drywall ceilings, soffits, furred columns, and shaft walls extracted from RCP and partition schedule. Three-sided soffits counted correctly.
UL assembly number matched to each partition. Insulation, gypsum type (Type X, C), and acoustic accessories per assembly.
From plan upload to verified estimate — purpose-built for drywall contractors.
Partition plans, partition schedule, ceiling plans, wall sections, and finish schedule.
Each wall segment tagged by partition type. Board SF, stud LF, track LF, and insulation per partition. Soffits and furring added.
Level 4 default applied; Level 5 applied where spec'd. A drywall estimator reviews flagged partition types and finish transitions.
Board SF, stud LF, track LF, tape and mud materials, corner bead, insulation, and labor hours by partition type and finish level.
Direct answers to the questions drywall estimators ask most.
Long-form guides with real waste factors, labor units, and bidding traps — written for working estimators.
How to measure, count, and quantify drywall scope without missing phantom items. Spec-to-drawing cross-checks, waste factors, and the common 2 percent errors that kill bids.
Labor units, burden, markup, and the real 2026 material pricing bands. Where new estimators underbid themselves and what experienced shops carry in contingency.
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