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A worker preparing a gutter downspout for an underground drainage connection

Exterior Waterproofing Services

Keep water away from your foundation with professional exterior waterproofing services from Crawl Space Brothers. We identify exterior moisture problems and recommend solutions that direct water away from vulnerable areas around your home. Our services include underground gutter downspout extensions and crawl space vent wells to address roof runoff, pooling water, and drainage concerns near your foundation.

Google4.9/ 51,300+ reviews
15,000
Homes protected
Lifetime
Transferable warranty
BBB Accredited Business
A+ Rating
Risk Free
Money-Back Guarantee
Licensed & insured

Signs Your Home May Need Exterior Water Management

Water pooling near your foundation, poor drainage, and blocked crawl space vents often point to exterior water management problems. Watch for these four warning signs around your home.

A two-story home with landscaping along its foundation

Water Pools Near Your Foundation After Rain

Roof runoff and poor surface drainage often create puddles beside your foundation. Identifying where the water comes from and how it moves across your property helps determine the right solution.

A debris-screen connection between a gutter downspout and underground pipe

Downspouts Discharge Water Beside the House

Short downspouts release roof runoff too close to your foundation, increasing the risk of pooling water and soil erosion. Underground downspout extensions direct that water to a suitable drainage point away from your home.

Gravel inside an exterior metal vent well at the base of a house

Soil or Mulch Collects Around Crawl Space Vents

Low crawl space vents often collect surrounding soil, mulch, and landscaping debris, blocking airflow and leaving openings vulnerable to water intrusion. Installing crawl space vent wells creates clearance around these openings and addresses nearby drainage conditions.

A metal vent well with gravel around a low foundation opening beside a downspout

Water or Erosion Keeps Returning to the Same Area

Recurring puddles, washed-out mulch, and saturated landscaping often indicate poor runoff control or drainage issues. A professional inspection identifies the source and determines whether your home needs a downspout extension, vent well, or another drainage solution.

Why Choose Crawl Space Brothers?

With over 15,000 homes protected, Crawl Space Brothers delivers guaranteed exterior water management solutions from licensed and insured exterior waterproofing contractors. We serve homeowners across North Carolina, South Carolina, Tennessee, DC, Maryland, and Virginia.

Free inspections. Custom-engineered solutions.
Assessments and recommendations tailored to your home, with custom-engineered solutions and a detailed written estimate.

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★★★★★Google review
“Mr. White was better than prompt; he called first and arrived before the scheduled time to inspect our crawl space for water intrusion. He was friendly, thorough, knowledgeable and professional in his inspection both inside and outside the house unlike other companies who did not even bother to go into the crawl…”
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space yet sent us exorbitant proposals. Mr. White determined the water intruding the crawl space could be mitigated by grading the soil away from the house and sealing the gutters. He recommended we contact a landscaping company. We would absolutely recommend Crawl Space Brothers to everyone because of the expertise and high level of integrity. He could have ripped us off but he didn't. We appreciate that.”
VenitaVerified Google review · Washington, DC · May 2022
Lifetime transferable warranty

Lifetime transferable warranty.

Protection that stays with your home, even when you sell, subject to applicable terms.

Money-back guarantee

Written money-back guarantee.

We stand behind our work with a written guarantee.

Five-star service guarantee

Five-star service guarantee.

Clear communication, respect for your home, and a service promise in writing.

Our Exterior Water Management Services

Crawl Space Brothers provides exterior waterproofing services to address drainage concerns around your foundation.

A worker preparing a gutter downspout for an underground drainage connection

Underground Gutter Downspout Extensions

Underground gutter downspout extensions connect existing downspouts to buried drainage pipes, directing roof runoff away from your foundation. Our team plans the pipe route, slope, and discharge point to reduce pooling water, soil erosion, and recurring runoff near your home.

View Downspout Extension Services
A metal vent well with gravel around a low foundation opening

Crawl Space Vent Wells

Crawl space vent wells create clearance around low foundation vents, keeping soil, mulch, and debris away from the openings. Our team evaluates surrounding grading and drainage conditions to address water collecting near your crawl space vents.

View Crawl Space Vent Well Services
A debris-screen connection between a gutter downspout and underground pipe
A metal vent well with gravel around a low foundation opening
A two-story home with landscaping along its foundation

How Exterior Water Management Helps Protect Your Home

Proper exterior water management directs water away from vulnerable areas around your home, reducing drainage problems and excess moisture near your foundation.

Redirect Roof Runoff Away From the Foundation

Underground downspout extensions carry roof runoff away from your foundation instead of releasing it directly beside your home. This reduces concentrated water around the foundation.

Reduce Localized Pooling and Soil Erosion

Directing runoff to a suitable discharge point reduces standing water and soil erosion around your home. Results depend on the outlet location and surrounding drainage conditions.

Maintain Clearance Around Crawl Space Vents

Vent wells keep soil, mulch, and debris away from low crawl space openings to prevent clogs.

Address Exterior Water Problems Before They Persist

Identifying and correcting drainage issues early addresses problems at the source, reducing recurring pooling, erosion, and moisture buildup near your foundation.

Our Exterior Water Management Process

A free inspection. A written estimate. The recommended work explained before you decide.

  1. Free Inspection

    Our team inspects areas where water collects, existing downspout outlets, and the ground surrounding crawl space vents. We evaluate drainage conditions to identify the source and determine the right solution.

  2. Custom Recommendations

    Based on our findings, we recommend exterior water management solutions tailored to your property. You'll receive a written estimate outlining the proposed work, installation details, and pricing.

  3. Professional Installation

    Our team installs the recommended solution using proven methods and quality materials. For downspout extensions, we connect downspouts to buried drainage pipes and position discharge outlets away from your foundation. For vent wells, we create clearance around crawl space vents and address surrounding drainage conditions.

  4. Final Walkthrough and Warranty

    We review the completed installation with you and explain any maintenance needed to keep the system working properly. Our team also reviews applicable warranty coverage and written guarantees so you know what to expect after installation.

A specialist reviewing recommendations at a homeowner’s table

What Does Exterior Water Management Cost?

The cost of exterior water management depends on your home's drainage needs and the type of service required. Factors like underground pipe length, discharge outlet placement, site access, and crawl space vent conditions affect the total price.

Crawl Space Brothers offers free inspections to assess your property and recommend the right solution. You'll receive a detailed written estimate outlining the proposed work and pricing before installation begins.

  • No gimmicks or pushy tactics.
  • Clear recommendations and an itemized scope.
  • Time to ask questions before work begins.

Fair & honest pricing.

No sales tactics. No pressure to decide on the spot. Your written estimate explains the work and the price before you make a commitment.

Your money is never at risk.Our written money-back guarantee stands behind the work.

What homeowners are saying.

4.9 ★ average across 1,300+ Google reviews · BBB A+ accredited.

Find Your Local Team

Crawl Space Brothers serves homeowners across the Carolinas, Tennessee, and the Mid-Atlantic. Choose your city for local service details and a free inspection.

District of Columbia, District of ColumbiaAnne Arundel, MarylandBaltimore, MarylandCalvert, MarylandCarroll, MarylandCharles, MarylandFrederick, MarylandHoward, MarylandMontgomery, MarylandPrince George's, MarylandQueen Anne's, MarylandSt. Mary's, MarylandTalbot, MarylandWashington, MarylandBaltimore, MarylandArlington, VirginiaCaroline, VirginiaClarke, VirginiaCulpeper, VirginiaFairfax, VirginiaFauquier, VirginiaFrederick, VirginiaKing George, VirginiaLoudoun, VirginiaMadison, VirginiaOrange, VirginiaPrince William, VirginiaRappahannock, VirginiaSpotsylvania, VirginiaStafford, VirginiaWarren, VirginiaWestmoreland, VirginiaAlexandria, VirginiaFairfax, VirginiaFalls Church, VirginiaManassas, VirginiaManassas Park, VirginiaJefferson, West VirginiaAlamance, North CarolinaAlexander, North CarolinaAnson, North CarolinaAvery, North CarolinaBeaufort, North CarolinaBertie, North CarolinaBladen, North CarolinaBrunswick, North CarolinaBuncombe, North CarolinaBurke, North CarolinaCabarrus, North CarolinaCaldwell, North CarolinaCaswell, North CarolinaCatawba, North CarolinaChatham, North CarolinaCherokee, North CarolinaClay, North CarolinaCleveland, North CarolinaColumbus, North CarolinaCraven, North CarolinaCumberland, North CarolinaDavidson, North CarolinaDavie, North CarolinaDuplin, North CarolinaDurham, North CarolinaEdgecombe, North CarolinaFranklin, North CarolinaGaston, North CarolinaGates, North CarolinaGraham, North CarolinaGranville, North CarolinaGreene, North CarolinaHalifax, North CarolinaHarnett, North CarolinaHaywood, North CarolinaHenderson, North CarolinaHertford, North CarolinaHoke, North CarolinaHyde, North CarolinaIredell, North CarolinaJackson, North CarolinaJohnston, North CarolinaJones, North CarolinaLee, North CarolinaLenoir, North CarolinaLincoln, North CarolinaMcDowell, North CarolinaMacon, North CarolinaMadison, North CarolinaMartin, North CarolinaMecklenburg, North CarolinaMitchell, North CarolinaMontgomery, North CarolinaMoore, North CarolinaNash, North CarolinaNew Hanover, North CarolinaNorthampton, North CarolinaOnslow, North CarolinaOrange, North CarolinaPamlico, North CarolinaPender, North CarolinaPerson, North CarolinaPitt, North CarolinaPolk, North CarolinaRandolph, North CarolinaRobeson, North CarolinaRowan, North CarolinaRutherford, North CarolinaSampson, North CarolinaStanly, North CarolinaSwain, North CarolinaTransylvania, North CarolinaTyrrell, North CarolinaUnion, North CarolinaVance, North CarolinaWake, North CarolinaWarren, North CarolinaWashington, North CarolinaWatauga, North CarolinaWayne, North CarolinaWilkes, North CarolinaWilson, North CarolinaYadkin, North CarolinaYancey, North CarolinaAbbeville, South CarolinaAnderson, South CarolinaCherokee, South CarolinaChester, South CarolinaChesterfield, South CarolinaEdgefield, South CarolinaFairfield, South CarolinaGreenville, South CarolinaGreenwood, South CarolinaKershaw, South CarolinaLancaster, South CarolinaLaurens, South CarolinaLee, South CarolinaLexington, South CarolinaMcCormick, South CarolinaNewberry, South CarolinaOconee, South CarolinaPickens, South CarolinaRichland, South CarolinaSaluda, South CarolinaSpartanburg, South CarolinaUnion, South CarolinaYork, South CarolinaBedford, TennesseeCannon, TennesseeCheatham, TennesseeClay, TennesseeCoffee, TennesseeCumberland, TennesseeDavidson, TennesseeDeKalb, TennesseeDickson, TennesseeFentress, TennesseeFranklin, TennesseeGiles, TennesseeGrundy, TennesseeHickman, TennesseeHouston, TennesseeHumphreys, TennesseeJackson, TennesseeLawrence, TennesseeLewis, TennesseeLincoln, TennesseeMacon, TennesseeMarion, TennesseeMarshall, TennesseeMaury, TennesseeMontgomery, TennesseeMoore, TennesseeOverton, TennesseePerry, TennesseePutnam, TennesseeRobertson, TennesseeRutherford, TennesseeSmith, TennesseeStewart, TennesseeSumner, TennesseeTrousdale, TennesseeVan Buren, TennesseeWarren, TennesseeWayne, TennesseeWhite, TennesseeWilliamson, TennesseeWilson, TennesseeAllen, KentuckyBarren, KentuckyButler, KentuckyChristian, KentuckyEdmonson, KentuckyLogan, KentuckySimpson, KentuckyTodd, KentuckyWarren, Kentucky
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Exterior Waterproofing FAQs

What exterior water management services does Crawl Space Brothers offer?

Our exterior waterproofing services include underground downspout extensions to redirect roof runoff and crawl space vent wells to maintain clearance around low vents.

Will an underground downspout extension fix a wet crawl space or basement?

Downspout extensions reduce roof runoff near your foundation, but they don't address groundwater or plumbing leaks. Other moisture sources require separate solutions.

What is the difference between a downspout extension and a vent well?

Downspout extensions redirect roof runoff away from your home, while vent wells maintain clearance and support drainage around low crawl space vents.

Do I need exterior water management or a crawl space drainage system?

Exterior water management addresses runoff outside your home, while crawl space drainage systems manage water entering the crawl space. The right solution depends on the water's source.

How do I know which exterior water management service I need?

Pooling water, soil erosion, and blocked vents point to different drainage problems. Our exterior waterproofing contractors inspect your property and recommend the appropriate solution.

Is exterior water management the same as basement exterior waterproofing?

No. Exterior water management redirects runoff and addresses drainage around your home, while basement exterior waterproofing typically involves treating foundation walls to prevent water intrusion.

Crawl Space Brothers provides free, no-obligation inspections across North Carolina, South Carolina, Tennessee, Virginia, Maryland, and Washington, D.C. We’ll find where the water is coming from and provide a written plan before any work begins.

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