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 Liner & Rebuild Across North Kensington
Most homes in North Kensington were built between the late 1930s and early 1960s, and nearly all of them still have the original clay tile chimney liner that was sized for coal or oil heat. That liner is now 60 to 80 years old. When the county inspector flags it, or when the flue starts shedding pieces into your firebox, you need a straight answer and a crew that knows the difference between a repair and a rebuild. We’ve worked the streets around Georgia Avenue, Plyers Mill Road, and the neighborhoods between Kensington and Wheaton for years. Call (240) 716-5865 and Wendell or one of his crew will walk you through what’s actually going on inside your chimney, before a single tool comes off the truck.
Why Top Hat Chimney Is North Kensington’s Preferred Chimney Liner & Rebuild Company
North Kensington’s housing stock is specific. Brick colonials and Cape Cods from the post-war years, almost all with full masonry chimneys, almost all converted from oil to gas without relining. When you call Top Hat Chimney, you’re not getting a rotating cast of strangers from a national franchise. Wendell Pike has run this company since 1999 and he puts his name on the work. The phone rings and a live person answers, 24 hours a day, seven days a week. It might be Wendell himself.
We answer call-backs too. The 90-Day Done Right Promise is stamped in writing on every job: if something isn’t right, one call brings Wendell back at no additional cost. For homeowners in North Kensington who’ve already been burned by a chain that quoted one price on the phone and another at the door, that difference matters. The number we give you before the job starts is the number on the invoice. No trip charge inside the county. Background-checked, uniformed crew. And you’ll probably see us again at the hardware store on Saturday.
Our Chimney Liner & Rebuild Services in North Kensington
Stainless Steel Liner
For North Kensington homes that were converted from oil to gas without a liner change, a stainless steel liner is the standard fix. We size it to the appliance per NFPA 211, not just to whatever fits down the flue. DuraFlex liners are what we install most often here, because they handle the acidic condensate from modern gas appliances that eats old mortar joints. A properly sized stainless liner restores draft, stops flue gases from leaking through cracked clay tile, and brings the chimney into code compliance.
Flexible Liner
Flexible liners make sense when the existing flue has slight offsets or when the chimney runs through a tight chase. They snake through the old clay tile without a full teardown. That saves walls and brickwork in older homes where opening up the chimney would mean tearing into finished interior work. In North Kensington’s Cape Cods, that often means the liner runs through a bedroom wall on the second floor. Flexible liner keeps that wall untouched.
Liner Replacement
When a liner has spalled, cracked, or separated at the joints, replacement is the only fix that actually works. We see this constantly in homes along Georgia Avenue and in the side streets off Plyers Mill Road. The old clay tiles may look fine from the top, but the camera tells a different story. We run a camera down every liner before recommending replacement. If we recommend it, you’ll see the footage yourself and get a plain-English verdict on what’s wrong and what happens if it waits. No liner gets replaced on a guess.
Partial Rebuild
A partial rebuild covers the section of the chimney above the roofline, or a section of damaged masonry below it. Freeze-thaw cycling in the DC metro area wrecks old lime mortar. Water gets into the crown, freezes, expands, and pops brick faces off. You’ll see the damage from the ground when it’s bad. What you won’t see is the interior spalling that started years ago. For a North Kensington colonial, a partial rebuild often means rebuilding the crown, repointing the top courses, and replacing the flashing in the same trip. It’s a bigger job than a sweep, but far less than a full teardown.
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 stock and install liners and components from brands we know hold up in this climate. Gelco and Copperfield are the two we turn to most for North Kensington’s older masonry chimneys. We keep common cap sizes and liner components on the truck, so most liner jobs along Georgia Avenue don’t wait on parts. For factory-built units in newer construction off Plyers Mill Road, we can source manufacturer-specific parts from Olympia Chimney and Famco, usually within the week. You won’t get a generic cap bolted onto a chase that needs a matched termination. Wrong caps choke draft and send flue gas back into the firebox. We’ve fixed that exact problem in North Kensington more than once.
Common Chimney Liner & Rebuild Problems We See in North Kensington Homes
- Original clay tile repurposed for gas without relining. The 1970s and 80s oil-to-gas conversions in North Kensington were frequently done without permits and without relining. The oversized 8×8 or 8×12 flue can’t draft a low-BTU gas appliance properly, and acidic condensate eats the mortar joints from the inside.
- Freeze-thaw crown and joint failure. DC winters cross 32°F dozens of times a season. That repeated expansion and contraction is brutal on lime mortar that’s been in place since the Truman administration. Crown cracks let water in, and interior spalling follows.
- Factory-built chases with mismatched terminations. Newer infill homes in North Kensington sometimes get a chase cover or cap from whatever was on sale at the big-box store. A wrong manufacturer’s termination chokes draft. Flue gases back up into the firebox. This is a fixable problem, but it takes the right cap and a proper inspection.
- Code violations flagged at sale or inspection. Montgomery County inspectors specifically flag chimneys where an appliance was replaced without a properly sized liner. If you bought a North Kensington home recently, there’s a real chance the inspection report mentioned this. It’s fixable, and we do it every week.
Pricing for Chimney Liner & Rebuild in North Kensington, MD
We Also Serve Cities Near North Kensington
We work throughout this corner of Montgomery County, and our Chimney Liner & Rebuild service covers more than just North Kensington. Crews regularly handle liner replacements and partial rebuilds in Rockville, North Potomac, Redland, and Travilah. The same upfront pricing and camera-inspection standard applies everywhere we go. If you’re in North Kensington proper or just outside it, call (240) 716-5865 and we’ll get you on the schedule.
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 Liner & Rebuild in North Kensington
My North Kensington Cape Cod switched from oil to gas in the 1980s. Does Montgomery County require a new liner now?
Yes. When an appliance is replaced or a fuel type changes, Montgomery County code (following NFPA 211) requires a liner properly sized for the new appliance. Most North Kensington homes that converted from oil to gas in the 70s and 80s never had this done. The original 8×8 or 8×12 clay tile flue is oversized for a modern gas furnace, which causes poor draft, acidic condensate, and a carbon monoxide hazard that county inspectors specifically flag. A stainless steel liner sized to the appliance fixes the code violation and the draft problem in the same job. Call (240) 716-5865 and we’ll come out with the camera before you spend a dime.
The chimney on our 1950s colonial looks fine from the ground-why would we need a rebuild?
Because the damage starts inside. Freeze-thaw cycling in North Kensington pushes water into the crown and flashing every winter. The mortar inside the flue spalls, the clay tile cracks, and the chimney sheds brick from the inside out. By the time you can see it from the yard, the rebuild is already past the point of a simple repoint. A camera inspection costs you nothing when you book a sweep, and for a 1950s colonial it’s the only way to know what you’re actually dealing with. Call (240) 716-5865 for a free inspection.
We just bought a newer home off Plyers Mill Road with a factory-built fireplace. Why does it need a chimney liner inspection?
Factory-built fireplaces have their own venting, and it’s specific to the manufacturer. The wrong chase cap or termination chokes the draft and pushes flue gases back into the firebox. We see this often in newer North Kensington construction where the builder used whatever cap was available. There’s also the matter of the chase itself: water gets in through the cap or flashing, and eventually the framing rots. A newer chimney still needs inspection, because the failure modes are different but just as real. We’ll check the cap, the termination, and the chase, and tell you honestly whether anything needs work.
How often should we have our North Kensington chimney inspected if we only burn gas logs?
Once a year, burn or no burn. We mean that. Gas logs run cool and produce a lot of moisture and acidic condensate. That condensate eats mortar joints and rusts dampers. It doesn’t need a hot fire to do its damage. An annual inspection on a gas-log chimney in North Kensington takes us about 45 minutes and catches liner degradation before it becomes a rebuild. Chimneys break in the off-season too. Call (240) 716-5865 to book.
What’s the difference between a partial rebuild and a full chimney rebuild for a 1948 brick colonial?
A partial rebuild covers the section above the roofline or a damaged section below it: the crown, the top courses of brick, the flashing. A full rebuild means tearing the chimney down below the roofline and relaying it course by course, which usually also means a new liner and new smoke chamber work. For a 1948 colonial in North Kensington with intact lower masonry but a failing crown and spalling top courses, a partial rebuild usually gets the chimney sound for decades. If the damage extends below the roof deck or the flue is collapsed, full rebuild is the honest answer. We’ll show you the camera footage and walk you through which one your house actually needs. Call (240) 716-5865 for a free estimate.
Call Top Hat Chimney for Chimney Liner & Rebuild in North Kensington
The chimney on your North Kensington home was built for a different fuel and a different century. Whether it’s a stainless steel liner for an oil-to-gas conversion, a partial rebuild of a crumbling crown, or a factory-built unit with the wrong cap, we’ll give you the straight answer with camera footage in hand. No upsell pressure, no price change at the door, no unreachable call center. Call (240) 716-5865 today for a free estimate.
Written by Wendell Pike, Owner at Top Hat Chimney, serving North Kensington and Montgomery County since 1999.