Our Trade
Most waterproofing problems start with the estimate, not the installation. We help you get it right from the start.
24–48 hour turnaround
Bid-ready in 24 to 48 hours
Waterproofing looks like an easier part of the project because, on paper, it looks like a simple task involving materials and labor. It’s not as easy as it looks. Underground waterproofing, foundation systems, roofing membranes, expansion joints, drainage points, and all the areas where pipes go through require different materials and labor sets. Missing even the slightest thing can open the door to warranty claims, customer complaints, and structural damage. Site conditions make it a bit more complicated. Aspects like ground level, water table height, soil or foundation type, and types of joints all affect the criteria of work to be done. Still, many estimators use a flat price per square foot, ignoring the real site conditions.
That is why a precise and detailed waterproofing estimate is essential. In this type of work, even if the slightest thing is overlooked, it only appears when the building is already in use. An accurate waterproofing estimate accounts for all the site and surface conditions, and every connection or penetration point. SMA Estimating LLC offers affordable waterproofing estimating services that are based on complete material takeoffs, so that you can bid and build with complete assurance.
Waterproofing falls within CSI Division 7, which is thermal and moisture Protection. Our estimators break the scope down by system type, so nothing gets priced off a generic line item:
Foundation walls, footings, and slabs-on-grade measured for sheet membrane, fluid-applied, cementitious, and bentonite waterproofing systems, plus drainage board and protection course quantities. These often overlap with our concrete estimation services since foundation walls and footings are priced together.
Self-adhering sheet membranes and fluid-applied (hot or cold) membrane systems quantified by square footage, including laps, terminations, and detail work at penetrations.
Weather-resistive barriers, vapor barriers, and rainscreen drainage components measured for exterior wall assemblies.
Vehicular and pedestrian traffic coatings, plaza deck membranes, and paver/paver-stand systems quantified for parking structures, balconies, and rooftop decks. All of these components are evaluated in our commercial estimates.
Sealant joints, expansion joint covers, and control joints measured linearly and matched to substrate and movement requirements.
Below-grade dampproofing coatings and water-repellent treatments quantified for foundation walls not subject to hydrostatic pressure.
Parapet caps, through-wall flashing, and roof-to-wall transition details measured and cross-referenced against both roofing and wall assembly drawings, since these junctions are where most envelope failures originate. Our team coordinates this scope with our roof cost estimates for accurate results.
Elevator pits, mechanical vaults, tunnels, and other fully below-grade enclosures measured for positive-side and negative-side waterproofing systems, including hydrostatic-rated membranes and injection grout allowances.
Outsourcing waterproofing estimating services to SMA Estimating LLC means you get everything your team needs to price and procure with confidence. Our deliverables include:
Waterproofing price per square foot is not fixed, so any estimate based on that alone is just a guess. The actual cost depends much more on the type of waterproofing system used, the underlying surface, and the severity of the water issue than on the size of the area. Let’s have a look:
| Scope | 2026 installed range |
|---|---|
| Damp proofing | $3–$6 per SF |
| Waterproofing, residential and light commercial | $3–$10 per SF |
| Sheet or fluid-applied membrane | $4–$7 per SF |
| Basement waterproofing, national average | $11.30–$13.45 per SF |
| Commercial interior systems | $8–$15 per SF |
| Commercial combined interior and exterior systems | $25–$45 per SF |
| Exterior French drain | $30–$90 per LF |
| Interior French drain | $60–$120 per LF |
| Crack injection | $250–$800 per crack |
| Exterior waterproofing, standard basement | $8,000–$15,000 |
| Full commercial foundation and exterior system | $50,000+ |
| Ranges compiled from 2026 U.S. cost data (HomeGuide, Angi). |
FEMA’s flood protection guidelines recommend sealing basement walls with waterproofing materials and using sump pump protection as one of the cost-effective methods to prevent water damage. This reveals that getting an accurate waterproofing estimate early on is far cheaper than paying for the repairs later when the building is already in use. For federally owned and leased buildings, the General Services Administration's P100 Facilities Standards have set required rules and regulations for moisture control and protection in building exteriors, which have to be followed by the estimating teams.
Most lost waterproofing bids come down to items that got missed. Our estimators check for each of these on every project:
| Common Mistake | What Goes Wrong | How We Prevent It | |
|---|---|---|---|
| Missed detail conditions | Uncounted penetrations and terminations, short labor and material | Tag and count every detail | |
| Low lap and overlap allowances | Sheet membranes need more material than the flat area | Laps follow manufacturer specs | |
| Wrong system for the site | A system is priced for the wrong water conditions | Check soil and water conditions before picking a system | |
| Missing drainage components | Protection board, drainage mat, and weeps are left out | Use drainage assembly checklist on every takeoff | |
| Generic waste factors | One waste % for all systems | Use waste factors specific to each system | |
| Scale errors on below-grade walls | Small-scale drawings give wrong quantities | Use BIM estimation services to verify and check details | |
| Outdated detail sheets | An old revision gets measured | Confirm the latest revision before the takeoff starts |
Our waterproofing estimating services cover projects across every sector, from ground-up construction to complex renovations.
Our cost estimating firm works with the following clients:
Accurate estimating of waterproofing takes system-specific knowledge most general estimators don't have. Outsourcing gives you:
Estimates delivered in 24–48 hours without compromising project quality.
Since our entire process runs on digital plans, we're able to serve contractors anywhere in the United States. There's no need for a site visit or travel fees, and you're never stuck waiting on someone to reach your location. Just send us your drawings, and we take it from there.
Certified estimators from the American Estimators Organization (AEO), American Association of Cost Engineers (AACE), American Society of Professional Estimators (ASPE), and Project Management Institute (PMI).
System-specific expertise estimated by trade specialists.
They can scale a specialty scope up or down project by project without carrying a full-time envelope estimator.
Send over the drawing set and specifications via Google Drive or our upload portal.
Flat-fee and fully scoped, so there are no hourly surprises down the line.
Structural sheets are cross-checked against architectural drawings and equipment schedules. Any gaps or conflicts are flagged back to you as a question before measurement begins.
Each system is quantified using digital takeoff software. ORs, imaging suites, isolation rooms, and back-of-house areas are measured individually, with color-coded markups linked directly to the plan set.
Material pricing reflects regional rates, while labor hours are calculated from crew size and production rates for each phase.
Single-trade packages typically turn around in 24–48 hours; full multi-division campus scopes take 3–5 business days.
Questions we get asked
A complete waterproofing estimate includes an itemized material takeoff by system type, labor hour estimates, color-coded marked-up drawings, and a supplier-ready material list.
Most projects are delivered within 24–48 hours. The time directly depends on project size and complexity. Larger commercial projects with extensive detail conditions may take slightly longer.
Waterproofing estimates cover systems designed to resist water under hydrostatic pressure. Damp proofing estimates cover systems that resist moisture vapor only. The right estimate depends on the site conditions.
Our estimators use Bluebeam Revu, PlanSwift, Trimble, and RSMeans, depending on the project requirements.
Yes. SMA Estimating LLC regularly prepares preliminary waterproofing estimates from schematic drawings before construction documents are complete.
All plans and quantities are handled under strict confidentiality. Files are stored securely and shared only with your project team.
Send your drawings and we will come back the same day with a fixed price and a delivery date. Your bid-ready in 24 to 48 hours.
