WATERPROOFING CONTRACTOR GROSS MARGIN BENCHMARKS.
Commercial waterproofing subcontractors typically run 26% to 27% gross margin at $1M to $5M and 27% to 28% at $5M to $10M. The Construction CFO targets the upper end of that range by pricing detail labor and substrate prep as their own line items instead of burying them in a flat square-foot rate.
Waterproofing carries a higher gross margin than most structural trades because the work is labor-dense and specification-driven. The catch is that detail work, penetrations, terminations, transitions, and substrate prep, is where the labor actually goes, and most contractors bill it inside one flat per-square-foot number. When the detail count runs heavy, the margin on paper stays the same while the real margin drops. The benchmark below shows where a waterproofing sub should land by revenue band, and the three reasons the number slips when it slips.
Waterproofing subcontractors at $1M to $5M typically net 7.5% to 8.5%, with gross margin in the 26% to 27% band. The Construction CFO targets 12% net by separating detail labor from field square footage and pricing warranty exposure into the bid, not by cutting price.
How it is calculated: Gross margin is revenue minus direct job cost (material, labor, equipment, and direct job expense), divided by revenue. It is the number that has to cover all overhead before any of it becomes profit. Track it per project and per system type, not just company-wide.
WATERPROOFING BENCHMARKS: WHERE YOU SHOULD BE.
| METRIC | INDUSTRY LOW | SPM TARGET | STRONG | NOTES |
|---|---|---|---|---|
| Gross Margin | 20% | 26–29% | 31%+ | Detail and prep labor priced separately, not in a flat SF rate |
| Net Profit Margin | 4% | 12% | 13.5% | After real overhead is loaded into every bid |
| Overhead Rate | 20% | 13–15% | 10% | Lower is better; warranty reserve belongs here, not buried in jobs |
| Days Sales Outstanding | 75 | 45 | 30 | Retention on below-grade work holds the last slice longest |
| Working Capital Ratio | 1.1 | 1.5 | 2.0 | Membrane material deposits hit before the first billing event |
WHAT MOVES THE WATERPROOFING MARGIN.
Detail labor hides inside a flat SF rate.
Below-grade and deck waterproofing gets bid at a square-foot price, but the labor lives in the details: penetrations, terminations, transitions, and tie-ins. When a job runs detail-heavy, the crew burns hours the SF rate never accounted for, and the margin erodes without anyone seeing why. Pricing detail work as its own line is the single biggest margin lever in this trade.
Substrate prep and warranty are priced, not absorbed.
Top performers bill surface prep and remediation as a separate scope, carry a funded warranty reserve in overhead, and track weekly labor against the estimate by system type. They also document weather standby and re-mobilization as change conditions instead of eating the cost. That discipline is what separates a 31% gross margin from a 24% one on the same work.
Check the detail count, the prep line, and the warranty reserve.
If your waterproofing margin is under 26%, look first at whether detail work is priced separately, whether substrate prep is its own SOV line, and whether warranty and callback exposure is funded in overhead instead of quietly draining finished jobs. Fix those three and the margin usually moves before you ever touch your bid price.
FLAT MONTHLY FEE. NO SURPRISES.
Two tiers based on trailing 12-month revenue. No hourly billing. No payroll. No add-ons. Everything included in the flat monthly fee.
| Revenue | Core Financial | Executive Financial |
|---|---|---|
| Under $1M | $1,900/mo | $2,900/mo |
| $1M–$3M | $2,600/mo | $3,600/mo |
| $4M–$6M | $3,800/mo | $5,500/mo |
| $7M–$9M | $5,100/mo | $6,900/mo |
| $10M–$12M | $6,100/mo | $8,500/mo |
| $13M+ | Quoted | Quoted |
ControlQore billed separately at ~$100/month per $1M in revenue. SPM does not handle payroll.
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