Level 1 sweep and inspection to the NFPA 211 annual standard - flue, crown, cap, and flashing checked and photographed
Chimney sweep logs do not sweep chimneys. They loosen some creosote - which then falls where a brush and vacuum still have to collect it.
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AfterFast, Reliable Chimney Repair Across North Kensington
Chimney repair in North Kensington usually means one of four things: repointing crumbling mortar joints, rebuilding spalled brick, fixing flashing that leaks at the roofline, or waterproofing the whole stack before another freeze-thaw winter chews it apart. Most jobs run between $450 and $2,800 depending on how far the damage has climbed. Wendell Pike and his crew have been working these 1940s and 1950s brick colonials since 1999, and we’ll give you a straight answer on what actually needs fixing versus what can wait. Call (240) 618-3233 for a free estimate.
Why Top Hat Chimney Is North Kensington’s Preferred Chimney Repair Company
The houses here are different from what you’ll find ten miles north. North Kensington is almost entirely post-WWII brick and frame construction, with original clay-tile-lined masonry chimneys that were never retrofitted when homeowners swapped oil boilers for gas. That creates a specific set of problems, and we see them every week on streets like Plyers Mill Road and the blocks around Kensington Parkway.
Wendell lives nearby and has been in North Kensington chimneys for over two decades. He puts his name and license number on every job. The 90-Day Done Right Promise is in writing, on every invoice: if the work isn’t right, one call brings him back at no additional cost. No fine print.
When you call, a live person answers. That may well be Wendell himself, and he’ll tell you what he thinks before he ever sets foot on your property. The price he quotes on the phone is the price on the invoice, no trip charge inside the county, and you’ll get a real arrival window, not a four-hour black hole.
Ask anyone on your street. North Kensington is small enough that word travels, and Wendell’s been running into the same customers at the hardware store on Saturdays for a long time.
Our Chimney Repair Services in North Kensington
Mortar Repointing
Decades of deferred tuckpointing on North Kensington’s modest brick exteriors let water behind the brick, so a small chimney leak at the roofline is often a spalling crown hiding under the cap. Repointing means raking out the old, failed mortar and replacing it with fresh refractory mortar matched to your brick. In North Kensington, we’re typically repointing the top six to ten courses where the weather hits hardest. A standard repointing job on a North Kensington chimney runs $550 to $1,400 depending on how high the damage climbs.
Spalling Brick Repair
Spalling is what happens when water soaks into the face of the brick and freezes. The brick face pops off in sheets. North Kensington sits in the mid-Atlantic freeze-thaw band, with winter temperatures crossing the 32°F line dozens of times per season, so spalling here is common even on chimneys that were well built. We cut out the damaged brick, replace it with matched units, and repoint the surrounding joints. Spalling repair in North Kensington typically runs $800 to $2,200 depending on how many courses are involved.
Chimney Waterproofing
Waterproofing is the cheapest insurance you can buy for a North Kensington chimney. It’s a vapor-permeable sealant that keeps rain and snowmelt out while letting the brick breathe. The area’s proximity to Rock Creek valley traps moisture longer, keeping older brick wetter and more frost-vulnerable between cleaning cycles, so waterproofing matters more here than it does on a ridge in Potomac. We use Gelco sealant because it penetrates and bonds without trapping moisture inside the masonry. A full chimney waterproofing in North Kensington runs $350 to $600 on a single-flue chimney, more on larger multi-flue stacks.
Flashing Repair
The flashing is the metal seal where the chimney meets the roof. On North Kensington’s 1950s colonials, that flashing is often original galvanized steel that has rusted thin in the corners where the chimney exits the roof. A seller will sometimes slap on a new chimney cap and paint the brick to hide flashing rot, but the first hard freeze pops the paint and the buyer’s Level 2 inspection finds a cracked smoke chamber the seller’s Level 1 sweeping never touched. We replace flashing with heavy-gauge metal, properly counter-flashed and sealed. Flashing repair in North Kensington runs $600 to $1,800 depending on the roof pitch and chimney footprint.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in North Kensington
We install and service liners and components from DuraFlex, HeatShield, Famco, and Copperfield because those brands hold up to the specific demands North Kensington’s older chimneys throw at them. We stock common liner sizes and termination caps locally, so a gas insert in a 1950s colonial doesn’t sit unusable while a part ships from three states away. If your current chimney has a Famco cap that’s rusted through or a Copperfield damper that won’t seat, we’ll tell you honestly whether it’s worth repairing or replacing, and we’ll have the replacement on the truck when we come back out.
Common Chimney Repair Problems We See in North Kensington Homes
- Oversized flues on gas conversions. Those 8×8 and 8×12 clay tiles were drafted for oil-fired boilers. When the oil boiler comes out and a gas insert goes in, the flue is too big, the draft is weak, and exhaust backdrafts into unused bedrooms upstairs. The fix is a properly sized stainless liner, not a bigger fireplace.
- Cracked clay tile flues from freeze-thaw cycling. The temperature swings around Rock Creek freeze the moisture inside old clay tiles and crack them in vertical runs. Once a tile is cracked, draft drops and the chimney becomes a repair, not a cleaning.
- Rusted damper assemblies under capped chimneys. A missing cap lets rain pour straight down the flue. The damper rusts shut, then the smoke chamber starts holding moisture, and the chimney starts staging creosote faster. By the time a North Kensington homeowner notices, the damper often needs full replacement.
- Hidden smoke chamber damage behind paint. When a North Kensington house goes on the market, some sellers paint the brick to make the chimney look solid. Paint traps moisture, and in a freeze-thaw season the brick spalls behind it. A Level 1 sweeping misses this. A Level 2 camera inspection finds it every time.
Pricing for Chimney Repair in North Kensington, MD
Here’s what we charge in North Kensington as of 2026, in plain numbers. Repointing runs $550 to $1,400. Spalling brick repair runs $800 to $2,200. Chimney waterproofing runs $350 to $600 for a single flue. Flashing repair runs $600 to $1,800. A partial rebuild of the top courses runs $1,800 to $3,500. A full stainless steel liner install for a gas insert typically runs $2,200 to $4,000. These are the numbers you’ll hear on the phone, and they’re the numbers on the invoice. No trip charge inside the county, $40 off any repair over $200, and 10% off for seniors and veterans every day. Call (240) 618-3233 for a free estimate.
We Also Serve Cities Near North Kensington
Top Hat Chimney works throughout the close-in Montgomery County suburbs. If your chimney is in Bethesda, Potomac, North Bethesda, or Chevy Chase, the same crew and the same 90-Day Done Right Promise applies. The Chimney Repair in North Kensington crew knows these streets, and we’re already in the neighborhood most weeks.
Serving North Kensington, MD - Our Local Coverage Area
We’re based in the North Kensington area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Chimney Repair in North Kensington
Because the original 8×8 and 8×12 clay flues were sized for oil boiler exhaust at a higher temperature and greater volume. A modern gas insert puts out a cooler, smaller exhaust stream, so the flue never draws properly, the draft reverses, and creosote stages inside the smoke chamber regardless of how often you clean the firebox. A properly sized stainless liner, usually a DuraFlex, brings the flue down to the right volume and restores proper draft. Call (240) 618-3233 for an exact quote, and we’ll show you the before and after camera footage.
Every 3 to 5 years for a home with multiple fireplaces sharing a single oversized clay flue, and sooner if you’ve just changed fuel type, bought the house, or noticed a draft problem or smell in a room that doesn’t have a fire. A Level 1 is a visual check that’s fine for a chimney that’s been working correctly since its last inspection. A Level 2 includes camera footage down the entire flue, and that’s what a home with multiple flues and a gas conversion actually needs. The camera doesn’t lie, and in North Kensington where chimney condition is routinely a negotiating point at closing, the Level 2 report pays for itself.
Because North Kensington’s housing stock is 70 to 80 years old, and the original mortar has absorbed seven decades of freeze-thaw cycling near the Rock Creek valley. Newer subdivisions in Germantown have chimneys that are 15 or 20 years old, with fresh mortar and modern flashing. The same winter that barely touches a Germantown chimney will crack the facing off a North Kensington chimney that hasn’t been repointed in 30 years. The good news is repointing, done before the brick itself spalls, is one of the most cost-effective repairs we do.
Ask for a written Level 2 inspection with camera footage, not a Level 1 sweeping, and make the report a condition of the contract. The chimney becomes a negotiating point in North Kensington transactions constantly, because this neighborhood turns over homes into the DC commuter market and sellers know a clean chimney report closes a sale. Specifically ask about the condition of the smoke chamber, the flue liner, the flashing, and the crown. If the seller offers you their old Level 1 report from the spring, politely ask for a camera inspection anyway. Our free second opinion on any competing written estimate covers exactly this scenario, and we’ll give you the footage and a plain-English verdict.
Third-degree creosote is a glaze, and it doesn’t brush off. Whether the chimney can be saved depends on what’s underneath once the glaze is addressed. We use HeatShield to resurface the smoke chamber and flue liner when the masonry is structurally sound but the surface is compromised. If the clay tiles themselves are cracked, the flue needs a stainless liner, which is a repair, not a rebuild. Only if the brick structure itself is failing do we recommend a rebuild. The camera footage will show you exactly which situation you’re in, and we won’t recommend a rebuild unless the brick says so. Call (240) 618-3233 and we’ll walk you through it.
Call Top Hat Chimney for Chimney Repair in North Kensington
If your chimney is spalling, leaking, drafting backward, or just hasn’t been looked at since the last decade, call (240) 618-3233. Wendell will give you a straight answer before any tool comes off the truck, and if the job doesn’t need doing, he’ll tell you that. If it does, you’ll know exactly what it costs, what it takes, and when we’ll be there. Free estimates, no trip charge inside the county, and the 90-Day Done Right Promise in writing. That’s how we’ve worked Chimney Repair in this neighborhood since 1999.
Written by Wendell Pike, Owner at Top Hat Chimney, serving North Kensington since 1999.