How to Prepare for Basement Waterproofing Quotes and Compare Written Proposals

Document What You Can Observe Safely

Before contacting anyone, write down what you have personally observed and when: where water or dampness appears, whether it happens after rain or snowmelt, any musty odor, and whether the problem is new or ongoing. Take dated photos of the affected areas, including where walls meet floors, around windows, and near any existing sump pit. Photograph from several angles so a contractor can see the whole space later.

Do not attempt to diagnose the cause yourself and do not start digging, drilling, or tearing out finishes to investigate. Your job at this stage is only to create a factual record of what you have seen. This record gives every estimator the same starting information and helps you notice if one proposal describes a different problem than another.

• When did I first notice the water or moisture, and does it follow a pattern such as heavy rain?
• Where exactly does it appear: one wall, a corner, the floor, or around a window?
• Do I have photos with dates that show the area wet and dry?
• Have I made any changes already, such as extending downspouts or running a dehumidifier?

Confirm Which Providers Actually Serve Your Address

Several waterproofing companies operate as networks of local dealers rather than as a single crew. Basement Systems, B-Dry, and Groundworks each direct homeowners to a location finder or coverage lookup on their official websites, because availability depends on where you live. Use the website rather than an advertisement to confirm a company covers your address before you spend time on an estimate. Basement Systems lists a central phone number, 1-800-638-7048, and a zip code lookup; B-Dry lists locations by state and, in some cases, the specific counties served.

Coverage is only the first filter. Note the name of the local office or dealer that serves you, because proposals, warranties, and service may all come from that local operation rather than the national brand.

• Does this company's website confirm coverage for my address or county?
• Which local office or dealer will actually visit my home?
• Is the estimate described as free and without obligation, and is that stated on the official site?
• What phone number and website belong to the local office, not just the national brand?

Prepare for the Inspection Visit

Clear access to the areas in question before the appointment: move storage away from the walls where you have seen moisture, and make sure the path to any existing sump pit, water heater, or electrical panel is walkable. If part of the basement is finished, know which panels or ceiling sections could be opened and which you want left intact. Plan for everyone who shares decision-making to be present, since proposals often involve choices you will want to discuss together.

During the visit, take your own notes while the estimator works. Ask them to point out what they are looking at and why, so you can compare their explanation with the written proposal afterward. An estimate is an observation and a proposed plan, not a guaranteed diagnosis of every future water event.

• What exactly are you looking at, and what are you seeing there?
• Which areas of my basement will you need to access, and will anything need to be moved or opened?
• Will the person who inspects be the same person who writes the proposal?
• How long after the visit will I receive the written proposal?

Compare the Proposed Method and Measurements

Ask each bidder to describe its proposed approach and explain the observations behind it. Request the dimensions and areas covered, the access route, and any work that would remain outside the proposal.

If two proposals name different methods, do not assume one is wrong; ask each company what the other approach would and would not address in your situation. The differences should be explained in the proposal itself, not just in conversation.

• Which method are you proposing: interior, exterior, or a combination, and why?
• How many linear feet of work does the proposal cover?
• What access will you need, and will I need to clear anything further?
• If another company proposed a different method, why do you believe yours fits this basement?

Compare Drainage Components, Sump Pump, and Discharge

If the proposal includes a drainage system, the written scope should list the components: the drainage channel or pipe, the sump pump unit, whether a backup pump or battery backup is included, and where discharged water will go. Some companies, including Basement Systems, install their own branded product lines through their dealer network, so the proposal may name proprietary products; ask what those products are and what the warranty on them covers. B-Dry notes on its website that warranty terms should be checked with the local dealer, which makes the local proposal the document that matters.

The discharge route deserves specific attention. Ask where the water will exit your home, whether that route can freeze or clog, and who is responsible if the discharge point needs modification on your property.

• Which drainage components are included, by name, in this proposal?
• Is a sump pump included, and does the price cover a backup pump or battery backup?
• Where exactly will discharged water go, and does that route have any known risks such as freezing?
• Are the products proprietary to the network, and can I get the product documentation before signing?

Clarify Demolition, Permits, Electrical Work, and Restoration

Ask who handles demolition, material removal, permits, and any proposed electrical work. Request a written description of what is included and what you would need to arrange separately. Confirm any permit questions with the authority for your address.

Finish restoration is the other frequent gap. If work passes behind finished walls or through floors, ask whether patching, drywall, flooring, or paint are included in the bid or excluded, and get the answer in the written scope.

• Does this proposal include demolition and removal of debris, or is that separate?
• Who pulls the permit, and is the permit fee included in the price?
• Who performs the electrical connection for the pump and backup, and is it licensed work?
• Is restoration of drywall, flooring, or paint included, excluded, or estimated separately?

Read the Warranty and Maintenance Terms Carefully

Ask for a copy of the actual warranty document before you sign, not just a summary. Warranty terms commonly differ between the national brand and the local dealer, particularly for network companies; B-Dry's own site directs homeowners to check warranty terms with the local dealer. Look for what is covered, for how long, whether coverage is transferable if you sell the home, and what conditions could void it, such as unauthorized alterations or missed maintenance.

Ask what annual or occasional maintenance the system requires, who performs it, whether it costs extra, and how warranty service requests are made years from now. A warranty is only as useful as the process for using it.

• Can I have a copy of the full written warranty to read before deciding?
• Is the warranty from the local dealer or the national company, and are both involved if I file a claim?
• Is coverage transferable to a new owner if I sell the house?
• What maintenance is required to keep the warranty valid, and who provides it?

Request Missing Details and Compare Side by Side

If a proposal leaves out a line item, ask the company to send a revised written proposal rather than a verbal answer. A useful phrasing is: the proposal does not state who handles permit fees and electrical connections; please include or explicitly exclude those items in writing so I can compare bids accurately. Request the same level of detail from every bidder so you are comparing complete documents, not one detailed bid against a vague one.

Then build a simple side-by-side sheet using the checklist below. Where proposals differ on method or scope, note the company's written explanation next to each difference. Your decision should rest on which written scope best matches your situation, which warranty and service terms you can actually use, and which contractor answered your questions directly in writing.

• Can you send a revised written proposal that includes or explicitly excludes this missing item?
• Will you put your explanation of why this method fits my basement in writing?
• What is the process and timeline for changes to the scope once work begins?
• Who is my single point of contact for questions during and after the project?

Your proposal comparison checklist

• Company name, local office address, and the exact dealer serving your address
• Proposed method: interior, exterior, or combination, with the company's written reason
• Linear feet and specific areas of the basement included in the scope
• Access requirements and anything the homeowner must clear or open
• Drainage components listed by name, including any proprietary products with documentation available
• Sump pump included, and whether a backup pump or battery backup is part of the price
• Discharge route described, including where water exits and who modifies that route if needed
• Demolition and debris removal: included, excluded, or priced separately
• Permit responsibility and whether the permit fee is in the price
• Electrical work: who performs it and whether it is in the bid
• Finish restoration: drywall, flooring, and paint included or excluded
• Full written warranty in hand, with coverage length, transferability, and voiding conditions
• Required maintenance, who performs it, and how warranty service is requested later
• Payment schedule, start date, and written process for scope changes
• A blank line per bidder for the company's written answers to your open questions

Provider sources and limitations

These first-party websites support the directory’s provider identities and published contact routes. The preparation questions above are editorial suggestions, not a diagnosis, repair specification, treatment recommendation, or professional review.

• B-Dry official website — checked 2026-09-06
• Basement Systems official website — checked 2026-09-06
• Groundworks official website — checked 2026-09-06