Are your Waterproofing services available in Kensington?

Yes, Arrow Tight Waterproofing provides round-the-clock Waterproofing services directly in Kensington, MD.

How much does emergency service cost in Kensington?

We offer upfront, transparent pricing with no hidden fees for all service calls in Kensington.

Waterproofing in Kensington, MD | 24/7 Local Service

Name: Arrow Tight Waterproofing
Telephone: +1-866-476-1348
Price range: $$
Rating: 4.9

Professional Waterproofing technician working in Kensington, MD

Who We Are

The Waterproofing Team Kensington, MD Calls When It Matters

Arrow Tight Waterproofing was founded on one principle: a dry basement shouldn't be a luxury. Our crew of certified technicians covers Kensington, MD with industrial waterproofing systems — the same membranes, drainage matting, and injection resins used in commercial construction, installed in your property at residential pricing.

Every technician on our team is IICRC-certified and carries full liability coverage. We pull permits where required, provide moisture readings before and after every job, and stand behind our work with a written warranty that transfers with the property.

✓ IICRC-Certified Waterproofing Technicians
✓ Commercial-grade materials on every residential job
✓ Permit-ready crews with full insurance documentation
✓ Transferable written warranty on all installed systems
✓ No-subcontractor policy — your crew is our crew

📞 Call Arrow Tight Waterproofing Now

Know the Warning Signs

Don't Wait — These Signs Mean Water Is Already Winning in Kensington

Most basement floods don't start as floods. They start as these ignored details. If you see any of these in your Kensington property, schedule a free inspection before the damage compounds.

Efflorescence on Block or Poured Walls

That white chalky residue isn't cosmetic — it's mineral salt deposited by water that has already penetrated your foundation wall.

Horizontal or Stair-Step Foundation Cracks

Vertical cracks are often settling. Horizontal cracks in block foundations indicate lateral soil pressure — a structural emergency, not just a cosmetic issue.

Musty Odor After Rain Events

If your basement smells earthy or musty after every heavy rain, active water intrusion is feeding organic growth — likely behind the drywall or under the slab.

Visible Seepage at Wall-Floor Joint

The cove joint — where the floor slab meets the foundation wall — is the most common water entry point in basement systems. Staining or pooling there means hydrostatic pressure is actively pushing in.

Peeling Paint or Bubbling Drywall

If interior basement paint is peeling or drywall is soft and bubbling, you have elevated relative humidity at the wall surface — a reliable sign of ongoing water vapor migration.

Sump Pump Running Constantly

Constant sump cycling means your drainage system is overwhelmed. This typically signals that your waterproofing perimeter needs to be upgraded, not just the pump.

Rust Stains on Concrete or Block

Iron in your concrete doesn't rust unless water penetration has reached it. Rust staining is a reliable indicator that your foundation waterproofing envelope has been breached.

Cracks in the Floor Slab

Floor slab cracks that show moisture after heavy rain are almost always driven by sub-slab water pressure. This typically requires sub-slab drainage and sump installation to relieve the pressure permanently.

What We Do

Complete Waterproofing Services for Kensington, MD Properties

Arrow Tight Waterproofing doesn't sell one-size-fits-all waterproofing packages. We diagnose the entry point, the pressure source, and the existing drainage condition — then we build the solution around what your specific property needs.

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Interior French Drain & Perimeter Drainage Systems

Interior drain tile systems collect groundwater at the footing level before it enters your living space. We saw-cut the slab perimeter, excavate to the footing, install gravel-bed perforated pipe, and tie it into a sump system with battery backup — so you stay dry even during power outages.

Our sub-slab drainage systems use schedule 40 perforated PVC pipe in a stone bed, designed to handle high-volume water tables.

📞 Get a Free Drainage Quote →

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Exterior Foundation Waterproofing & Membrane Application

Full exterior waterproofing involves exposing your foundation to the footer depth, applying a crystalline or elastomeric waterproofing membrane, installing a geocomposite drainage mat, and placing exterior drain tile at the footing — the same specification used in new commercial construction.

We use SilkOate, UMARK, and other commercial-grade membrane systems — not the paint-on damp-proofing that deteriorates within a few years.

📞 Schedule an Exterior Assessment →

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Poured-Wall Crack Injection & Block Wall Repointing

Poured concrete foundation cracks are repaired from the interior using high-pressure polyurethane or epoxy injection — the appropriate chemistry depends on whether the crack is actively leaking or dry. Polyurethane foam expands into wet, actively leaking cracks and cures flexible, accommodating minor future movement. Epoxy injection is used in dry cracks where structural bond restoration is the goal.

For concrete block foundation walls showing horizontal cracking or inward bowing, we pair crack repair with carbon fiber reinforcement straps anchored at the floor and rim joist.

📞 Get a Crack Injection Estimate →

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Crawl Space Moisture Control: Encapsulation to Full Waterproofing

We install a minimum 20-mil reinforced poly vapor barrier over the entire crawl space floor and seal it up the walls to the sill plate — then seal all vents, install a conditioned air supply or dedicated crawl space dehumidifier, and spec a sump system if groundwater is present.

For crawl spaces with active water entry, we install a perimeter drain channel at the footer line, route it to an appropriate discharge point or sump.

📞 Schedule a Crawl Space Inspection →

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Primary & Backup Sump Pump Systems for Kensington Homes

The sump pit itself matters as much as the pump. We construct 18-inch diameter pits with a gravel bed at the base for proper water collection, sealed lids to prevent vapor and radon entry, and a discharge line that terminates a minimum of 10 feet from the foundation at a positive-grade daylight point.

For finished basements and properties with high groundwater, we recommend a dual-pump system: a primary submersible at normal operating level and a pedestal backup set two inches higher.

📞 Get a Sump System Quote →

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Egress Window Waterproofing & Well Cover Systems

Basement window wells are one of the most underestimated water entry points in residential waterproofing. When the well drain becomes clogged or the well itself is sized incorrectly for your roof drainage load, water pools against the window frame and enters through the sill, the window-to-frame joint, or the block wall directly adjacent.

Window well covers are a maintenance measure, not a waterproofing solution — but paired with proper drainage installation.

📞 Book a Window Well Assessment →

Why Arrow Tight Waterproofing

The Arrow Tight Waterproofing Difference — What You Actually Get When You Hire Us

There are a lot of waterproofing companies in MD. Here's what separates the ones who fix the problem from the ones who fix the symptom — and why Arrow Tight Waterproofing consistently lands on the right side of that line.

Inspection-First, Proposal-Second

Our process starts with a thermal imaging scan and moisture meter readings at the wall surface, floor, and any visible crack or staining.

Commercial-Grade Materials at Residential Pricing

The waterproofing membrane we apply to your foundation is the same specification used on commercial buildings in MD — a 60-mil rubber barrier.

Licensed, Insured & Permit-Ready in MD

Every technician on our crews is a direct employee of Arrow Tight Waterproofing, insured under our policy, and trained to our installation standards.

Fixed-Price Proposals Before Any Work Begins

Our proposals are itemized: materials, labor, drainage footage, discharge line run, and any accessory items listed separately.

Transferable Lifetime Warranty on Installed Systems

Our drainage system installations carry a written warranty against water intrusion through the protected area for the life of the system.

We Answer Emergency Calls Nights, Weekends, Holidays

Our emergency dispatch protocol means a technician assesses the situation within 60 minutes of your call in most of our MD service territory.

📞 Get Your Free Waterproofing Assessment

How It Works

Our 4-Step Waterproofing Process in Kensington

Call +1-866-476-1348 — Any Time

Call +1-866-476-1348 or fill out our contact form. A live dispatcher answers around the clock. We'll get your address and route a technician based on availability and urgency.

Free On-Site Inspection & Diagnosis

Your technician inspects the perimeter, scans the walls with thermal imaging, measures moisture content at every crack and stain, and maps the likely water path from grade to interior. This takes 45–90 minutes and is completely free.

You Get a Written Quote — No Pressure, No Surprises

The proposal covers every item: materials, drainage footage, labor, discharge routing, and any permit fee. The number on the proposal is the number on the invoice.

We Install, We Verify, We Warranty

{Our crew completes the installation to the approved scope. On completion, we conduct a post-installation moisture check, walk you through the system, and provide the written warranty documents registered to your property address.|Installation is completed by our direct-employee crew. We clean up the jobsite, verify pump function and discharge routing, take post-install moisture readings, and hand you the warranty documentation before we leave.}

Real Customer Reviews

Hear It From Customers Who Hired Us Across Kensington, MD

★★★★★

"The crew showed up within 3 hours of my call at 9 PM on a Tuesday. I had water coming in through a crack in my poured wall at the floor joint — had been watching it for two seasons and finally called when it started spreading. They installed an interior drain system along two walls and a new sump pit. The work took two days. I've had three major rain events since then — completely dry. Worth every dollar.That kind of result speaks for itself."

Michael R. Homeowner in Kensington, MD

★★★★★

"I've had two other companies look at my foundation crack before these guys. Both gave me vague proposals and neither one could tell me exactly why I had water or where it was coming in. Arrow Tight Waterproofing came out, brought a thermal camera, and showed me on screen exactly where the moisture was concentrated. The polyurethane injection they did on the crack has held for 18 months now with zero seepage. That's the most competent inspection I've ever gotten from a contractor.That kind of result speaks for itself."

Sandra T. Property Owner

★★★★★

"I bought a house in Kensington, MD knowing it had a moisture issue in the crawl space — previous owners had put down a thin plastic sheet that was doing nothing. Arrow Tight Waterproofing encapsulated the entire crawl space with a 20-mil liner, sealed the vents, and installed a dehumidifier. Within two weeks my downstairs floors stopped feeling cold and damp and the musty smell completely disappeared. The technician walked me through every step before starting. No surprises on the invoice.I'd recommend them to anyone dealing with the same problem."

David K. Crawl Space Encapsulation Client

★★★★★

"We had a window well that flooded every time we got more than an inch of rain. The well was filling up and water was coming straight in through the window sill joint. The fix was a regraded well with a perforated pipe tied into our existing interior drain. The whole job took one day. The crew was professional, cleaned up completely, and the well has handled every storm since without an issue.I'd recommend them to anyone dealing with the same problem."

Lisa M. Window Well Drainage Client in Kensington, MD

★★★★★

"Called Arrow Tight Waterproofing after my old sump pump failed during a storm and I had 4 inches of water on my basement floor. They answered at midnight, arrived within an hour, and had a temporary pump running within 20 minutes of showing up. Once the emergency was managed, they walked me through a permanent drainage system upgrade. That was 8 months ago — I've had 6 rain events including one significant storm and the basement has stayed dry.That kind of result speaks for itself."

James W. Homeowner

★★★★★

"As a commercial property manager overseeing several buildings in Kensington, MD, I've worked with a lot of waterproofing contractors. Arrow Tight Waterproofing is the first one that showed up to the initial walk with a written inspection checklist and completed it on-site before quoting. Every other contractor just eyeballed it and sent a number. Their exterior membrane on the building we had done 3 years ago is holding perfectly with zero callbacks.Highly recommend the whole crew."

Angela F. Commercial Property Manager in Kensington, MD

24/7 Emergency Waterproofing experts in Kensington, MD

Common Questions

Frequently Asked Questions About Waterproofing in Kensington, MD

How do I know if I need interior or exterior waterproofing?

The distinction comes down to where the water pressure is coming from — interior drainage handles water at the cove joint and lower wall.

How long does a basement waterproofing installation take?

Interior drain tile systems typically take 1–2 days depending on perimeter footage; full exterior excavation runs 2–5 days depending on footer depth.

Will basement waterproofing affect my home's resale value?

A professionally waterproofed basement with a transferable warranty is a selling feature, not just a repair. It eliminates a mandatory disclosure item, removes a negotiation point for buyers, and makes finished basement space more credibly usable in appraisals.

Does homeowner's insurance cover basement waterproofing?

Standard homeowner's insurance policies generally exclude damage from groundwater seepage, which is classified as a "maintenance issue." Sudden and accidental water damage from a burst pipe or equipment failure is typically covered.

How much does basement waterproofing cost in Kensington, MD?

Waterproofing costs vary significantly based on the solution required, the perimeter footage, and the existing drainage conditions. Interior drain tile systems for a standard residential basement typically run $4,000–$12,000.

What is the difference between damp-proofing and waterproofing?

Damp-proofing is the asphalt coating sprayed on new foundations during construction. It costs the builder very little, is not rated for hydrostatic head pressure, and typically fails within 10–20 years.

Do I need to leave my home during waterproofing installation?

For interior work, displacement is rarely required. There will be concrete saw noise and dust during the initial saw-cut phase — we use HEPA-equipped dust containment systems — but most homeowners remain in the house throughout an interior drainage installation.

What causes basement walls to crack?

Foundation wall cracks typically result from two forces: differential settlement (one part of the foundation moving more than another as soil consolidates beneath it) and hydrostatic pressure (water-saturated soil exerting lateral pressure against the wall).

Can waterproofing be done in winter or during rainy weather?

Interior systems: fully year-round. The work is inside, unaffected by outdoor temperatures or rain.

How do I maintain my waterproofing system after installation?

A properly installed interior drainage system and sump pump system requires minimal maintenance, but that minimal maintenance matters. Test your sump pump every 6 months by pouring water into the pit.

Is crawl space encapsulation worth it if I don't have standing water?

A dirt floor crawl space — even one with no visible water — maintains near-100% relative humidity at the ground surface, and that moisture migrates upward by diffusion and stack effect air movement. You don't need standing water to have a moisture problem in a crawl space.

Service Area

Arrow Tight Waterproofing Serves All of Kensington, MD — Including Kensington

Arrow Tight Waterproofing provides Waterproofing services across the full extent of Kensington, MD. Whether you're in a densely populated metro area or a rural property 40 miles from the nearest hardware store, our crews are dispatched from regional staging points to keep response times short and service costs predictable.

For property owners in Kensington and the surrounding areas, same-day or next-day appointments are typically available. Emergency calls — active flooding, sump pump failure, sudden seepage — receive priority routing and a 60-minute response target in most of our coverage footprint.

Basement Waterproofing Foundation Crack Repair Crawl Space Encapsulation Sump Pump Systems Exterior Waterproofing Window Well Drainage Emergency Response Commercial Properties

📞 Call Now to Check Availability in Kensington

Waterproofing in Kensington, MD — We Stop Water Before It Stops You

The Waterproofing Team Kensington, MD Calls When It Matters