# Leaky Chimney Repair West Hartford CT | Waterproofing > Stop chimney leaks in West Hartford, CT. Flashing repair, crown sealing & Silane-Siloxane waterproofing. Diagnostic assessments & free estimates. Call now. URL: https://westhartfordchimneyrepair.com/chimney-leaks-waterproofing/ ![Technician repairing failed step flashing on a chimney at the roofline](/images/misc/chimney-with-failed-step-flashing-being-repaired-b.webp) # Chimney Leak Repair & Waterproofing in West Hartford Flashing repair, crown sealing, and breathable waterproofing to stop chimney leaks before they rot framing and stain ceilings. Schedule Now [/contact/ →](/contact/) Call (860) 305-5234 [tel:+18603055234 →](tel:+18603055234) CSIA CertifiedSweeps & Techs 30+ YearsServing Central CT FreeVirtual Estimates Financingvia Synchrony Last Updated: July 23, 2026 A leaking chimney rots framing, stains ceilings, and accelerates masonry decay. We diagnose the true entry point — flashing, crown, cap, or porous brick — then fix it and protect the masonry with breathable Silane-Siloxane water repellent that stops absorption without trapping moisture. ## The Four Places a Chimney Actually Leaks A leaking chimney damages more than the chimney itself. Once water gets in, it rots framing, stains ceilings, ruins insulation, and — outside — accelerates freeze-thaw decay of the brick and mortar. The first job is finding the true entry point. There are almost always one of four: 1. **Failed flashing at the roofline.** The metal that seals the joint between the chimney and the roof shingles. Aluminum lifts, sealants dry out, and step flashing separates. 2. **A cracked chimney crown.** The concrete slab on top of the chimney. Hairline cracks let rain drip straight down into the masonry. 3. **A missing or damaged chimney cap.** Without a cap, rain falls directly into the flue. Old caps rust through or blow off in storms. 4. **Porous or spalling brick.** Old or damaged brick faces absorb rainwater like a sponge. Water then wicks inward. ## Diagnostic First, Repair Second We never guess. Every leak call starts with a diagnostic that inspects all four points, checks the attic above the chimney for water tracks, and — when the leak is intermittent — runs a controlled water test with a garden hose to confirm the source before we recommend work. ## What We Repair - **Step flashing and counter flashing** — replacing failed aluminum with new aluminum, copper, or lead depending on your roof and budget - **Cricket (saddle) installation** on chimneys wider than 30 inches to divert water around the upslope side - **Crown repair** — sealing minor cracks with elastomeric crown sealer or replacing failed crowns entirely (see our crown repair guide [/guide/chimney-crown-repair-and-replacement/ →](/guide/chimney-crown-repair-and-replacement/) ) - **Cap installation** — stainless steel or copper caps sized to your flue - **Silane-Siloxane waterproofing** — a breathable water repellent applied to the entire masonry face ## Why “Breathable” Matters Not all waterproofing is created equal. The wrong sealer — a non-breathable acrylic or silicone — traps moisture inside the brick. When Connecticut winters hit, that trapped moisture freezes and blows the brick face off. We use **Silane-Siloxane** repellents that block water absorption but let vapor escape. Beading water on the outside, dry brick on the inside. ## What Happens If You Wait - Water stains bloom on the ceiling by the chimney chase - Interior brick and firebox start showing white **efflorescence** - The mortar between bricks softens and washes out - Brick faces begin **spalling** as freeze-thaw damage accelerates - Eventually the chimney needs a full rebuild [/chimney-masonry-repair/ →](/chimney-masonry-repair/) instead of a leak repair A $500 flashing repair now can prevent a $15,000 rebuild in five years. That’s the honest math. ## What’s Included - Leak-source diagnostic assessment - Step & counter flashing repair - Crown & cap sealing - Breathable Silane-Siloxane waterproofing - Cricket saddle installation on wide chimneys - Copper and lead flashing options - 10+ year written warranty on waterproofing ## Recent Work ![Water leaking into a brick fireplace during a rainstorm](/images/features/water-dripping-into-brick-fireplace-during-rainsto.webp)![Cracked chimney crown letting water into the masonry](/images/features/cracked-chimney-crown-letting-water-into-masonry-t.webp)![Fresh step and counter flashing sealed at a chimney base](/images/features/fresh-step-flashing-and-counter-flashing-sealed-at.webp)![Technician spraying Silane-Siloxane waterproofing on a chimney](/images/features/technician-spraying-clear-silane-siloxane-water-re.webp) Our Process ## How Our Chimney Service Works Simple, transparent, and safe from booking to cleanup. 01 ### Free Estimate Schedule online, by text, or by phone. Choose an in-person visit or a free virtual assessment. 02 ### Diagnostic & Quote Our CSIA-certified tech inspects your chimney, sends a photo-documented report, and gives you a clear written quote. 03 ### Job Day (Spotless) We arrive on time in a branded truck, protect your home with drop cloths and HEPA vacuums, and do the work right. 04 ### White-Glove Cleanup After masonry work, we wash the roof, clean gutters, water plants, and rake footprints out of the lawn. ![Chimney sweep finishing work on a New England home](/images/cta/chimney-sweep-technician-finishing-job-on-brick-ch.webp) ## Ready to Book Your Leaks & Waterproofing? Get a free virtual estimate in minutes, or schedule an in-person visit this week. Schedule Now [/contact/ →](/contact/) Call (860) 305-5234 [tel:+18603055234 →](tel:+18603055234) ## What Our Customers Say 5 average from 1,000+ reviews > “Found a leak during the heavy rains last week. They were out the next morning, traced it to the flashing, and fixed it same day. Clean, professional, and fair pricing.” > “Our 1920s chimney needed a full rebuild. The crew rebuilt it beautifully and then washed the roof and raked the lawn afterward. You'd never know they were here, except the chimney looks brand new.” > “Booked a sweep and inspection by text. The tech laid down drop cloths, used a HEPA vacuum, and showed me the video scan of the flue. Genuinely the most thorough chimney company I've used.” ## Questions About Leaks & Waterproofing ### Why is my chimney leaking only when it rains hard? + Hard rain drives water past weak flashing seams, into cracked crowns, or down into porous brick faster than mild rain can. That's why leaks that seem fine most of the year suddenly show up during a nor'easter. ### How do you find the source of a chimney leak? + We inspect all four common entry points — flashing at the roofline, the crown on top, the cap or missing cap, and the brick faces themselves. Sometimes we run a controlled water test to confirm before repairing. ### Is chimney waterproofing safe for my brick? + Yes — as long as it's breathable. We use Silane-Siloxane repellents that stop water absorption but let vapor escape. Non-breathable sealers trap moisture inside the brick and make freeze-thaw damage worse, which is why we never use them. ### How long does chimney waterproofing last? + Quality Silane-Siloxane applications typically last 7–10+ years and carry a written warranty. We recommend a light re-application at the 10-year mark for chimneys with a lot of freeze-thaw exposure. Learn More ## Guides Related to Leaks & Waterproofing In-depth answers to the questions homeowners ask us most. ### Common Causes of a Leaking Chimney The most common chimney leak causes — failed flashing, a cracked crown, a missing cap, porous brick, and condensation. Read guide [Common Causes of a Leaking Chimney →](/guide/common-causes-of-a-leaking-chimney/) ### How Chimney Flashing Fails and How It's Repaired Chimney flashing failure explained — step and counter flashing, lead vs copper, corrosion, cricket saddles, and repair steps. Read guide [How Chimney Flashing Fails and How It's Repaired →](/guide/how-chimney-flashing-fails-and-is-repaired/) ### Why Is Water Dripping Into My Fireplace When It Rains? Rain in your fireplace usually enters through failed flashing, a cracked crown, or a missing cap. How to tell them apart and act quickly. Read guide [Why Is Water Dripping Into My Fireplace When It Rains? →](/guide/water-dripping-into-fireplace-when-it-rains/) ### Is Chimney Waterproofing Worth It? Chimney waterproofing prevents costly freeze-thaw damage. How breathable repellent works, cost versus a rebuild, and typical warranties. Read guide [Is Chimney Waterproofing Worth It? →](/guide/is-chimney-waterproofing-worth-it/) Service Areas ## Serving West Hartford & Central Connecticut Based in West Hartford, we serve Hartford, Tolland, and Litchfield counties. Same-week scheduling for most towns. West Hartford [/service-areas/west-hartford/ →](/service-areas/west-hartford/) Hartford [/service-areas/hartford/ →](/service-areas/hartford/) East Hartford [/service-areas/east-hartford/ →](/service-areas/east-hartford/) Windsor [/service-areas/windsor/ →](/service-areas/windsor/) South Windsor [/service-areas/south-windsor/ →](/service-areas/south-windsor/) Newington [/service-areas/newington/ →](/service-areas/newington/) Wethersfield [/service-areas/wethersfield/ →](/service-areas/wethersfield/) Farmington [/service-areas/farmington/ →](/service-areas/farmington/) Avon [/service-areas/avon/ →](/service-areas/avon/) Simsbury [/service-areas/simsbury/ →](/service-areas/simsbury/) See All Service Areas [/service-areas/ →](/service-areas/) ![Map of West Hartford Chimney Repair service area in central Connecticut](/images/features/map-of-west-hartford-central-connecticut-chimney-s.webp)