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ONE PROBLEM, IN DETAIL

DRYWALL: THE CRITICAL-LIGHTING PUNCH DISPUTE

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Finish disputes get judged under the wrong light. A GC super with a flashlight down an unlit hallway can manufacture a skim-coat demand on walls that meet spec.

This page covers one problem. The other places this trade loses margin are on the drywall operating system page.

BY JOSH LUEBKERPublished 2026-08-06Updated 2026-11-02
WHAT BREAKS

WHERE THE MONEY GOES.

The critical-lighting punch dispute (unpaid rework by inspection standard)

Finish disputes get judged under the wrong light. A GC super with a flashlight down an unlit hallway can manufacture a skim-coat demand on walls that meet spec. The industry standard is inspection under permanent lighting, viewed from back from the wall at a perpendicular angle, but the sub who can't cite it absorbs the rework.

HOW DRYWALL CONTRACTORS DESCRIBE IT

IN THEIR OWN WORDS.

Walls are finished, sanded, primed. There's NO permanent lighting in the building and the GC super is shining lights down the hallways and demanding we come back to skim the walls.

DrywallTalk, medical office Level 4 thread

The proper way to punch drywall surfaces is to do so under permanent lighting standing 5 or 6 feet back from the wall at a perpendicular angle, but he's not accepting it.

DrywallTalk, medical office Level 4 thread (same thread)

WHAT THIS TRADE SHOULD EARN

THE NUMBER TO MEASURE IT AGAINST.

Drywall contractors have about 6% net profit at $1M to $5M, rising to roughly 9% at $5M to $10M. The CFOS net profit target is 10% before taxes at $1M to $5M, the trade's average plus 3.5 points, never below 10%. You find a problem like this in the distance between those two figures. One bad job won't tell you.

Gross margin over the same bands is 19% to 21%,against CFOS targets of 22% and 23.5%.

Full drywall benchmark bands by revenue

WHAT CONTROLS IT

THE SYSTEM THAT FIXES THIS.

Job Profitability System

Cost codes built against the estimate, so a job can be read while it is open.

How the Job Profitability System works

COMMON QUESTIONS

FREQUENTLY ASKED.

Inspection under permanent lighting, viewed from several feet back at a perpendicular angle. A flashlight raked down an unlit hallway is the wrong test. Put the inspection standard in the contract before the job starts. A sub who can't cite the standard pays for skim coats the spec never required.

Drywall contractors at $1M to $5M net 6 percent on average, rising to 13 percent by $25M to $50M; the CFOS net profit target is 10 percent before taxes at $1M to $5M, since the target is the trade average plus 3.5 points and never below 10. The difference usually comes from unpaid rework, untracked back-charges and schedule compression the unit price never priced. Every net profit figure here is gross margin minus overhead, stated before taxes, the same basis CFMA reports net income on.

See the full benchmarks for every revenue band on Run On CFOS.

Because labor pays out weekly through hang and finish, and the receivable comes in 60 to 90 days later. Then 5 to 10 percent retainage waits on the whole project's punch list, yours and everyone else's. At a 6 percent net margin before taxes, the retainage hold is bigger than the profit.

Three tiers, and which one you are in depends on how much of the work you want off your desk. On Core we build your plan every month and your team does the work: job costing built against the way you estimate, a 13 week cash forecast, monthly WIP, and a monthly meeting that ends in decisions, while your bookkeeper keeps doing the books. On Strategic we build the plan, track it and adjust it every month: our team does the bookkeeping and the bank reconciliations, and the job costing and WIP software is set up and managed for you, on your own online software or ours. On Platinum we manage the money side for you every week: our team handles your bills and receivables the way an in-house controller would, and you approve every payment. We don't do payroll.

Sixty days. We migrate your books back to the start of your last taxable year and build your job costing structure from scratch, and on Strategic and Platinum we set up the job costing and WIP software too. You're fully up and working in two months. The onboarding fee is one time, the same for every tier, and set by your revenue band.
WHAT THIS TIES INTO
Josh Luebker, SPM The Construction CFO
Josh Luebker
FRACTIONAL CFO · SPM THE CONSTRUCTION CFO

Josh Luebker is a master electrician turned construction CFO, president of SPM The Construction CFO and author of CONTROL: C.F.O.S. Construction Financial Operating System.

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