STRUCTURE & ENVELOPE CLUSTER · CFOS TRADE OPERATING SYSTEM

WHY SIDING CONTRACTORS LOSE MARGIN WITHOUT KNOWING IT.

QUICK ANSWER

Siding margin is lost to three specific things: the seam that leaks later, the warranty gate, and the field-wall illusion. All three are measurable, and all three are invisible without job costing that reads against the estimate.

Siding contractors at $1M to $5M net 5.5 percent on the SPM 48-trade dataset, among the thinnest floors of the 48, rising to 8 percent by $25M to $50M; the CFOS target at $1M to $5M is 10 percent. The distance between the trade average and the CFOS target isn't a pricing problem in this trade. It sits in the three mechanisms below, each of which moves margin without appearing as a failure on any single job. WRB, flashing, and integration scope seams surface as leak claims years after cover-up, and the last trade to touch the wall explains first. Written boundaries and cover-up photos are the cladding contractor's decade-long testimony.

BY JOSH LUEBKERPublished 2026-08-06Updated 2026-08-06
THE THREE BIG LEAKS

THE MATH BEHIND THE MISSING CASH.

LEAK 01

The Seam That Leaks Later

WRB, flashing, and integration scope seams surface as leak claims years after cover-up, and the last trade to touch the wall explains first. Written boundaries and cover-up photos are the cladding contractor's decade-long testimony.

LEAK 02

The Warranty Gate

Manufacturer installation specs are warranty conditions: clearances, gapping, and fastener schedules installed outside the book kill the product warranty and leave the installer holding the tail. Spec-compliance documentation is the QC that pays.

LEAK 03

The Field-Wall Illusion

Squares of field wall set the pace the bid remembers; corners, trim, and transitions set the pace the job actually runs. Production tracked by detail class is the difference between a 5.5 percent floor and the levers above it. (cfos-job-profitability-system) ---

HOW CFOS FIXES IT

WHAT CHANGES IN THE FIRST 60 DAYS.

The WRB seam (whose water barrier is it?)
Material mix economics (four products, four cost worlds)
Detail density (the linear-foot tax, cladding verse)
Weather-exposed production and the swing-stage question
The thin floor (why siding sits at the batch's bottom)
SIDING BENCHMARKS
Metric$1M to $5M$5M to $10M$10M to $25M
Gross margin, industry average21%22%23%
Gross margin, CFOS target23%22%23%
Net profit, industry average7%9%11%
Net profit, CFOS target10%10%12%
Overhead, industry average14%13%12%
Overhead, CFOS target13%12%11%

Industry figures are Siding contractors' AVERAGE for each revenue band, not a floor. The CFOS net profit target is set at 10 percent before taxes or 3.5 points better than your trade's average at your revenue, whichever is higher, and the gross margin target is set at whatever gross margin produces that net profit once your overhead is paid, and never below your trade's own average. Gross minus overhead equals net on every column, so the rows tie out. The gross margin and overhead figures for this trade are derived from the nearest comparable trade in the same dataset, and were not measured directly.

Last 12 months revenueMonthly fee
Up to $1M$1,900 to $2,900
$1M to $3.5M$2,600 to $3,900
$3.5M to $6.5M$3,800 to $5,700
$6.5M to $9.5M$5,100 to $7,100
$9.5M to $12.5M$6,100 to $8,500
$12.5M to $15.5M$7,400 to $11,000
$15.5M to $18.5M$9,400 to $13,500
$18.5M+Quoted individually

Range reflects the three tiers below. Which one you're in depends on how much of the work you want off your desk. No payroll. No hidden line items.

Core

You stop guessing.

You get the CFO work. Job costing built against the way you estimate, a 13 week cash forecast, monthly WIP, and a meeting every month that ends in decisions rather than a report.

Your bookkeeper keeps doing the books.

Executive

You stop touching the books.

Everything in Core, and we run the bookkeeping and the controllership as well. Nobody in your office is answering coding questions or chasing a reconciliation at month end.

We do the books. No payroll.

Strategic

Every job shows its margin while it's still running.

Everything in Executive, plus the job costing and WIP platform set up, loaded with your cost codes, and managed for you every month. You never have to learn it.

We do the job costing.

What's included
COMMON QUESTIONS

FREQUENTLY ASKED.

Siding contractors at $1M to $5M net about 5.5 percent on the SPM 48-trade benchmark dataset, among the thinnest floors of the 48, rising to 8 percent by $25M to $50M; the CFOS target at $1M to $5M is 10 percent. The levers are product-line splits, detail-class pricing, and the documentation discipline that keeps leak claims where they belong. Every net profit figure here is stated before taxes, the same basis CFMA reports on, so the two are directly comparable.
Whoever the scope and the photographs say. WRB, window flashing, and siding integration are separate scopes that meet at the seams where water finds its way; define the boundaries in writing, accept the substrate formally, and photograph everything before cover-up. The last trade on the wall explains first unless the record says otherwise.
No. Vinyl, fiber cement, engineered wood, and metal panels carry different material costs, crew skills, fastening specs, and warranty regimes. Track production and cost by product line; blended history misprices all four and the most mispriced line wins the worst work.
They're warranty gates: clearances, gapping, and fastener schedules installed outside the book void the product warranty and leave the installer with the tail. Document spec compliance (photos, fastener schedules, batch records) as billed QC; it's the cheapest insurance in the trade.
Separately, by detail class: corners, penetrations, trim packages, transitions, and gables run slow, skilled linear-foot work that field-wall square pricing donates. Track both production rates so the bid carries the architecture instead of eating it.
Sulphur Prairie Management, operating as The Construction CFO, publishes the 48-trade benchmark dataset these numbers come from. SPM's deepest specialization is 24 core commercial trades, and SPM works with siding contractors who want the same financial system: onboarding, clean books, a maintained 13-week cash flow forecast, and monthly health reviews, with job costing simplified to what the business runs on. The full 48-trade benchmark reference exists so owners in every trade can measure against real numbers. ---
CFOS serves commercial siding subcontractors doing $1M to $12M. Pricing starts at $1,900 per month for companies under $1M and runs to $13,500 per month at the top published band. Onboarding takes 60 days.
Three tiers, and which one you are in depends on how much of the work you want off your desk. Core is where you stop guessing: 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. Executive is where you stop touching the books, because we run the bookkeeping and the controllership as well. Strategic is where every job shows its margin while it is still running, because the job costing and WIP platform is set up and managed for you. No payroll. No scope gaps.
Sixty days. We migrate your books back to the start of your last taxable year, set up ControlQore, and build your job costing structure from scratch. Fully operational in two months.
$10.7M+
Client AR Recovered Since 2023
48
Active Trade Specializations
60 DAYS
Average Onboarding Time
WHAT THIS TIES INTO
Josh Luebker, The Construction CFO
Josh Luebker
FRACTIONAL CFO · THE CONSTRUCTION CFO

Former commercial construction project manager and master electrician. Managed 150+ projects worth more than $2.1B combined, with individual jobs from $50,000 to $300M, including data centers, military bases, hospitals, and high-rises. Now fractional CFO for commercial subcontractors doing $1M to $12M through Sulphur Prairie Management.About Josh  | LinkedIn

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