Deal Structure Guide · Waterproofing Company

How Waterproofing Company Deals Are Structured in the Lower Middle Market

From SBA-backed acquisitions to PE roll-up buyouts, here is exactly how buyers and sellers structure deals for $1M–$5M waterproofing businesses — including real dollar breakdowns, earnout mechanics, and negotiation strategies specific to the trades.

Acquiring or selling a waterproofing company involves deal structures shaped by three forces unique to this industry: long-tail warranty liability, owner dependency in sales and estimating, and the fragmented regional nature of the market. Most transactions in the $1M–$5M revenue range fall into one of three structures — SBA 7(a) financed asset purchases, earnout-tied acquisitions, or full cash buyouts by private equity-backed home services platforms. Each carries different risk allocations for warranty obligations, equipment condition, and transition support. Sellers who understand these structures before going to market negotiate better terms, shorter escrows, and cleaner closes. Buyers who match the right structure to the right business protect themselves against hidden liabilities while still competing effectively for quality waterproofing contractors. EBITDA multiples for waterproofing companies typically range from 3x to 5.5x, with the upper end reserved for businesses with recurring maintenance contracts, diversified client bases, and licensed crews that can operate without the founder.

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SBA 7(a) Loan with Seller Note

The most common structure for first-time buyers and owner-operators acquiring a waterproofing business. The SBA 7(a) loan finances 80–90% of the purchase price, the buyer injects 10% equity, and the seller carries a 10% subordinated note typically deferred for 24 months. This structure requires clean, auditable financials and no undisclosed warranty liabilities that could impair the business's ability to service debt.

80–90% SBA loan / 10% seller note / 10% buyer equity

Pros

Maximizes buyer leverage with low equity injection, typically 10% down on a $2M–$4M deal
Seller note signals seller confidence in the business and aligns post-close cooperation during transition
SBA terms of 10 years provide manageable debt service relative to waterproofing EBITDA margins of 15–25%

Cons

SBA underwriting scrutinizes warranty liability reserves, which can delay or derail deals with large undisclosed backlogs
Seller must remain engaged during SBA-required transition period, which can create friction if the owner is ready to exit fully
Equipment appraisals required by SBA lenders may reduce eligible loan proceeds if injection rigs and vehicles are aging

Best for: Owner-operators with construction or trades backgrounds acquiring their first or second waterproofing business using SBA financing, particularly residential-focused contractors with clean books and stable revenue.

Asset Purchase with Earnout

The buyer purchases the business assets — equipment, vehicles, customer contracts, trade name, and transferable warranties — and ties a portion of the purchase price to post-close revenue or EBITDA performance over 12–24 months. This structure is common when the seller's financials show growth trends that are difficult to verify or when warranty claims history is incomplete. Earnouts in waterproofing deals typically range from 10–20% of the total purchase price.

75–85% at close / 10–20% earnout over 12–24 months / 5–10% buyer equity or cash

Pros

Reduces buyer risk when warranty claim history is unclear or when revenue growth depends on the seller's relationships
Incentivizes the seller to actively support the transition and maintain customer relationships post-close
Allows buyers to pay a higher headline price while protecting downside if commercial or GC-dependent revenue does not transfer

Cons

Earnout disputes are common if revenue tracking, warranty cost allocation, or EBITDA definitions are not precisely documented in the purchase agreement
Sellers may feel disadvantaged if post-close operational decisions by the buyer negatively affect the metrics that trigger earnout payments
Earnout structures complicate SBA financing and may require the earnout to be treated as contingent consideration, affecting loan sizing

Best for: Strategic acquirers such as foundation repair firms or restoration companies acquiring a waterproofing bolt-on where customer relationships and commercial contract retention are uncertain during transition.

Full Cash Acquisition with Management Retention Bonus and Equity Rollover

Private equity-backed home services roll-up platforms typically acquire waterproofing companies for all cash at close, with the seller retaining a 10–20% equity stake in the combined platform and key managers receiving retention bonuses tied to 12–24 month employment agreements. This structure is designed to move quickly, retain operational continuity, and align the seller's financial interests with the platform's long-term growth.

80–90% cash at close / 10–20% equity rollover / management retention bonus of 5–10% of deal value

Pros

Sellers receive maximum liquidity at close without deferred consideration or earnout risk
Equity rollover gives sellers a second bite of the apple if the platform achieves a successful exit at a higher multiple
Management retention bonuses reduce the risk of key estimators, foremen, or project managers leaving post-acquisition

Cons

Sellers give up full control and must operate within the platform's systems, branding, and reporting requirements
Equity rollover value is illiquid and dependent on the PE platform achieving its exit timeline and valuation targets
Roll-up platforms may reprice deals late in diligence based on warranty liability findings or customer concentration issues

Best for: Established waterproofing businesses with $3M–$5M in revenue, strong recurring revenue from maintenance contracts, and a management team capable of running operations independently — positioned as a platform or anchor acquisition for a PE-backed roll-up.

Sample Deal Structures

SBA-Financed Acquisition of a Residential Waterproofing Contractor

$1,800,000

SBA 7(a) Loan: $1,440,000 (80%) | Seller Note (deferred 24 months): $180,000 (10%) | Buyer Equity Injection: $180,000 (10%)

10-year SBA loan at current prime + 2.75%, fully amortizing. Seller note subordinated to SBA, deferred for 24 months then paid over 36 months at 6% interest. Seller agrees to 12-month transition providing field estimating support and customer introductions. Warranty obligations limited to claims arising from work performed prior to close, capped at $75,000 in escrow for 18 months.

Earnout-Tied Asset Purchase of a Mixed Residential and Commercial Waterproofing Business

$2,750,000 (up to $3,250,000 with full earnout)

Cash at Close: $2,200,000 (80%) | Earnout: Up to $500,000 over 24 months tied to EBITDA exceeding $550,000 annually | Buyer Equity: $275,000 (10%) | SBA Loan: $2,200,000 (80%)

Earnout calculated semi-annually based on trailing EBITDA as defined in the purchase agreement, with warranty claim costs excluded from EBITDA calculation during earnout period. Seller remains as VP of Business Development for 24 months at $85,000 annual salary. Equipment escrow of $50,000 held for 6 months to cover deferred maintenance items identified during diligence. No single customer may represent more than 20% of earnout-period revenue without buyer consent.

PE Roll-Up Platform Acquisition of an Anchor Waterproofing Business

$6,500,000 (5.0x EBITDA of $1,300,000)

Cash at Close: $5,525,000 (85%) | Equity Rollover at Platform Level: $975,000 (15%) equivalent to 3% of the combined platform entity

Seller receives cash at close funded by PE platform's credit facility. Equity rollover priced at platform's most recent 409A valuation with standard drag-along and tag-along rights. Seller and general manager sign 24-month employment agreements at market-rate compensation with EBITDA-based bonus up to 15% of base salary. Warranty reserve of $150,000 established in an escrow account to cover claims from pre-acquisition work, released 50% at 12 months and 50% at 24 months subject to no material warranty disputes.

Negotiation Tips for Waterproofing Company Deals

1Quantify warranty liability before you negotiate price — require the seller to produce a full schedule of active warranties, remaining term, and historical claim rates for the past three years. In waterproofing, a $2M revenue business can carry $200,000 or more in future warranty service obligations that are invisible in the financials but very real to a buyer inheriting them.
2Tie any earnout metrics to EBITDA, not gross revenue — waterproofing revenue is easy to manipulate through warranty service call volume or seasonal scheduling, but EBITDA with clearly defined add-back exclusions protects buyers from paying earnout on revenue that erodes margins.
3Negotiate an equipment inspection contingency with a 30-day due diligence window specifically for injection rigs, sump pump systems, and service vehicles — aging or poorly maintained equipment is one of the top value killers in waterproofing acquisitions and can require $100,000–$300,000 in immediate capital expenditure that should be reflected in the purchase price.
4If the seller is owner-dependent for sales and estimating, structure a minimum 12-month transition agreement with specific milestones — introduction of the buyer to the top 20 customers, joint field visits on at least 10 commercial estimates, and formal handoff of all GC and property manager relationships with documented contact records in a CRM.
5For SBA deals, work with an SBA lender experienced in home services and trades acquisitions — lenders unfamiliar with the waterproofing industry may over-reserve for warranty liability or undervalue recurring maintenance contract revenue, reducing eligible loan proceeds unnecessarily and slowing your close.
6When negotiating with a PE-backed roll-up platform, focus on the equity rollover mechanics — specifically the platform's current EBITDA multiple, its debt load, and the realistic timeline to a liquidity event. A 15% rollover in a highly leveraged platform exiting in 7 years is worth far less than a 10% rollover in a platform with a 4-year horizon and clean balance sheet.

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Frequently Asked Questions

What is the typical purchase price range for a waterproofing company in the lower middle market?

Waterproofing companies generating $1M–$5M in annual revenue typically sell for 3x–5.5x EBITDA. A business with $1.5M in revenue and 20% EBITDA margins ($300,000 EBITDA) would likely sell for $900,000–$1,650,000. Businesses at the upper end of the multiple range have recurring maintenance contract revenue, diversified residential and commercial client bases, licensed independent crews, and clean auditable financials for three or more years.

How does long-tail warranty liability affect deal structure for a waterproofing business?

Warranty liability is the single most deal-specific risk in waterproofing acquisitions. Many waterproofing contractors offer lifetime or 25-year warranties on interior drain tile systems, and buyers inherit those obligations in an asset purchase unless specifically carved out. Buyers should negotiate a warranty escrow of 5–8% of the purchase price held for 18–24 months, require a full warranty schedule as a diligence deliverable, and review historical claim rates. Sellers should document clean claim history proactively to defend their valuation.

Can I use an SBA 7(a) loan to buy a waterproofing company?

Yes. Waterproofing companies are strong SBA candidates because they are asset-backed businesses with real property, equipment, and vehicles that support collateral requirements. SBA 7(a) loans can finance 80–90% of the purchase price with a 10-year term. The key underwriting risks SBA lenders focus on for waterproofing businesses are undisclosed warranty reserves, owner dependency, and customer concentration. Buyers should present a clean transition plan and ensure the seller's financials are reconciled to tax returns before approaching SBA lenders.

What is an earnout and when does it make sense in a waterproofing acquisition?

An earnout defers a portion of the purchase price — typically 10–20% — and ties it to post-close business performance, usually revenue or EBITDA over 12–24 months. In waterproofing, earnouts make sense when the business has strong growth momentum that is hard to verify, when commercial revenue is heavily dependent on the seller's GC relationships, or when warranty claim history is incomplete. The critical requirement is a precise contractual definition of the earnout metric that excludes warranty service costs and specifies how disputes are resolved.

What does a PE-backed home services platform look for when acquiring a waterproofing company?

Roll-up platforms are specifically seeking waterproofing businesses with $1M–$5M in revenue that can serve as either an anchor market entry or a geographic bolt-on. They prioritize recurring revenue from maintenance contracts and sump pump service agreements, diversified client bases with no single customer above 15% of revenue, operational management teams that can run without the founder, strong Google review presence and inbound lead flow, and clean books. They move fast and pay full cash at close but expect equity rollover and management retention commitments.

How long does the owner typically need to stay involved after a waterproofing company is sold?

Most buyers require a 6–12 month transition period, and SBA lenders often mandate it as a condition of financing. For waterproofing businesses where the owner handles sales, estimating, and customer relationships, 12 months is the realistic minimum to transfer knowledge, introduce the buyer to key commercial accounts, and validate that field crews and project managers can operate independently. Sellers who have already built a project manager or sales manager into their operations often negotiate shorter, part-time transition arrangements.

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