How to read a basement waterproofing quote — line by line

The basic test of whether a quote is honest.

Most quote disputes between homeowners and contractors aren't about price. They're about scope mismatch — one party thought the quote included something the other party did not. The cure for that is a quote that itemizes every component so both sides can point at the same line on the same paper. Any waterproofer who refuses to do that is hiding something — either the actual product they're installing, the actual labor included, or the actual margin they're charging.

We hand homeowners an itemized written quote at every inspection. Most prospects haven't seen one in five waterproofer quotes. That gap alone wins us work.

Line by line — what should be in every quote.

For interior drain tile, here's what a complete quote contains:

• Linear feet of drain tile— explicit measurement, not “full perimeter.” You should be able to verify it with a tape measure.
• Pipe specification— “4-inch corrugated perforated drain tile.” If the quote says “drain system,” ask what specifically.
• Aggregate spec— washed 3/4″ drainage gravel, not pea gravel or concrete chips.
• Geotextile fabric — wrapped around the gravel envelope. Mentioned by name.
• Concrete demolition and re-pour — linear feet, depth cut, finish spec.
• Sump pit— “existing rebuild” or “new sealed basin install,” specifically.
• Primary pump— brand, model, HP. “Zoeller M53 1/3 HP cast iron with PSC motor and vortex impeller,” not “our standard pump.”
• Backup pump— brand, model, battery type. “Zoeller Aquanot 508 with maintenance-free AGM battery,” not “backup system.”
• Discharge plumbing — pipe spec, check valve, run distance from foundation.
• Vapor barrier wall membrane — included or excluded, with linear feet if included.
• Permits — included, excluded, or not required (depending on city).
• Restoration scope— explicit on what's included (concrete patch and finish) and what's separate (drywall, flooring, finished-basement restoration).
• Warranty terms— lifetime, transferable, written. If verbal, get it in writing or assume it doesn't exist.
• Total price — broken down by labor, materials, permits, taxes.

If a quote you're reviewing is missing five or more of these, it's not actually a quote. It's a sales document.

Sales tactics designed to hide what you're buying.

A legitimate waterproofing quote should be good for 30 days. If yours expires that evening, the contractor is telling you everything you need to know.

The reason franchise waterproofers run high-pressure same-day sales is that their close rates depend on it. Sales reps work on commission against monthly quotas. The longer you have to think about the quote, the higher the chance you'll get a second opinion and discover the “proprietary” pump is a white-labeled box-store unit. The expiring price is the mechanism that prevents that comparison from happening.

How to compare two quotes apples to apples.

If you have two quotes that are $7,000 apart, the question isn't which is cheaper — it's whether they're for the same product. Run this comparison:

90% of the time, when two quotes are significantly different, one of two things is happening: (1) the cheaper quote is a top-of-footer plastic channel system marketed as drain tile, or (2) the expensive quote is from a franchise carrying massive marketing overhead. Sometimes both. Once you know which one you're looking at, the “price difference” resolves itself.

Bring both quotes to a third waterproofer for a tiebreaker if you can't tell. We'll happily review competitor quotes at the free inspection — we'll tell you honestly whether the other contractor is selling the same product, a different product, or the same product at honest pricing.

The five questions every quote should answer.

1. Is the drain tile installed below the slab at footing depth, or at slab elevation?
   Below-slab = real drain tile. Slab-elevation = a channel system, which is a different (and less effective) product.
2. What brand and model is the primary pump, and is the housing cast iron or plastic?
   Named brand = serviceable by any plumber in the country. “Exclusive” = orphan hardware risk.
3. Is the warranty written, lifetime, and transferable to the next homeowner?
   Transferable adds resale value. Verbal guarantees are worthless.
4. Are you bonded and insured, and can I see a Certificate of Insurance?
   Verify any Minnesota contractor license at dli.mn.gov. Ours is IR802718.
5. Will you give me an itemized written quote before I sign anything?
   This is the basic honesty test. Hedging here tells you everything.