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TL;DR: SPM provides fractional CFO services for waterproofing contractors doing $1M-$12M in commercial new construction. Job costing by square feet by membrane type and substrate in ControlQore, overhead rate including all real costs, WIP reporting monthly, and AR collection system that clears the backlog in 30 days. Most waterproofing clients find their first month's AR collection exceeds the annual SPM fee.

Waterproofing

The CFO for
Waterproofing Contractors.

You bid by the square. Your margin lives or dies in the field every week. If you find out a job is losing money at closeout it is too late. We make it visible in week two.

Published: May 2026  ·  Updated: May 2026
26-31%
Target Gross Margin
Week 2
When Variance Is Visible
60 Days
Full Onboarding
5 hrs/mo
Owner Time Required
The Problem

What Kills Waterproofing Margins

Most waterproofing do not know a job is losing money until it is done. The estimate looked right. The crew was working. But the actual cost per square feet by membrane type and substrate was running over estimate for three weeks and nobody knew it until closeout.
01

No SF Cost Tracking by Membrane Type

You bid sheet membrane at $1.95/SF and liquid-applied at $2.80/SF. You have no visibility into whether liquid-applied areas came in at estimate or 25% over due to substrate irregularities. At closeout the job blended and you cannot identify where the margin compression occurred.

02

Substrate Condition Variance Not Documented

The concrete substrate on floors 3-6 required additional crack routing and sealant preparation before membrane application - 14,000 SF at 20 minutes per 100 SF. That prep work was in the scope but not a separate SOV line. You funded $8,400 in additional prep labor from margin.

03

Warranty Callbacks Absorb Unbudgeted Labor

A failed lap joint on a section of sheet membrane required a warranty callback - $3,200 in labor and material. Warranty callbacks are expected in waterproofing. When they are not budgeted in overhead they become surprise margin erosion.

The Fix

How SPM Builds the Waterproofing Financial System

SPM builds ControlQore cost codes aligned to the waterproofing estimate structure so actual cost per square feet by membrane type and substrate posts weekly against estimated cost. Variance is visible in week two.
ControlQore cost codes by membrane type and SF. Sheet membrane by type, liquid-applied by thickness, blindside waterproofing, plaza deck - each as separate cost codes. Actual cost per SF by membrane type posts weekly. Substrate variance visible in cost code detail before it compounds.
Substrate prep as a separate SOV line. SPM reviews every waterproofing SOV for substrate preparation allocation. Crack routing, grinding, primer application - documented as a separate line item with billing trigger at substrate acceptance. Prep work billed at occurrence not absorbed into the membrane SF rate.
Warranty provision in overhead rate. Expected warranty callback rate calculated from historical project data - typically 0.5-1.5% of annual revenue in callbacks. That provision belongs in the overhead rate. SPM builds it in at engagement start so callbacks are covered by overhead rather than absorbed from project margin.
Pricing

What It Costs

Priced by last 12 months of revenue. ControlQore billed separately at ~$100/month per $1M. SPM does not handle payroll.

RevenueCore FinancialExecutive Financial
Under $1M$1,900$2,900
$1M-$3M$2,600$3,600
$4M-$6M$3,800$5,500
$7M-$9M$5,100$6,900
$10M-$12M$6,100$8,500
$13M+QuotedQuoted
FAQ

Frequently Asked Questions

What does a CFO for waterproofing contractors do?
A fractional CFO for waterproofing contractors builds the job costing structure aligned to the estimate - cost codes by square feet by membrane type and substrate - so actual cost per unit is visible weekly against estimated cost per unit. They manage WIP reporting, overhead rate calculation, billing calendar, and monthly cash flow. The result: you know which jobs are winning and which are losing before you cannot do anything about it. All SPM clients run on ControlQore - purpose-built for construction job costing at $1M-$12M.
What overhead rate should waterproofing contractors use?
Waterproofing Contractors at $1M-$3M typically run 15-17% overhead. The most common errors are missing owner compensation at market rate and not including equipment depreciation or vehicle fleet in the SG&A calculation. Each of those understates the real overhead rate and underprices every bid.
What are the most common cash flow problems for waterproofing contractors?
Three consistent problems: schedule of values that underbills early phases which are the most cash-intensive work, overhead rate below actual because ownership costs are not fully included, and AR sitting uncollected at 45+ days with no follow-up system. Most waterproofing contractors have all three simultaneously. SPM fixes all three in the first 60 days.
What gross margin should waterproofing contractors target?
Waterproofing Contractors at $1M-$12M in commercial new construction typically target 26-31% gross margin. Margin below the lower end of that range usually indicates a markup problem, an overhead rate understatement, or job costing that is not capturing all direct costs accurately.
Do you handle payroll?
No. SPM does not handle payroll. We have vetted partners including prevailing wage and Davis-Bacon integrations that connect directly with ControlQore at additional cost.
How long does onboarding take?
60 days. We migrate your books to the start of your last taxable year, build your ControlQore job costing structure, and get you fully operational in two months.
What software do you use?
All SPM clients run on ControlQore - purpose-built for construction job costing and WIP reporting at $1M-$12M. More capable than QuickBooks for job costing, more affordable than Sage. We set it up and manage it.
Do I need clean books to start?
No. Most clients come with messy books and no job costing. That is exactly what onboarding is for.
Josh Luebker
Josh Luebker
Fractional CFO · The Construction CFO

Former commercial construction project manager and master electrician. Managed 150+ projects totaling $300M+. Now fractional CFO for commercial subcontractors doing $1M–$12M through Sulphur Prairie Management. About Josh →  |  LinkedIn →

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