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 Cap & Crown Across Chillum
Chimney cap and crown work in Chillum runs $185-$650 for most jobs, depending on whether we’re replacing a basic single-flue cap or rebuilding a cracked crown and fitting a custom multi-flue base. The bigger issue in this part of Prince George’s County isn’t usually the price. It’s what we find once the old cap comes off. Wendell Pike and his crew at Top Hat Chimney have worked these tight rowhouse streets long enough to know that a routine cap replacement in a 1950s attached pair can turn into a real discovery about what the neighbor’s chimney is doing to yours. Call (240) 618-3233 and we’ll give you an honest read before a single tool comes off the truck.
Why Top Hat Chimney Is Chillum’s Preferred Chimney Cap & Crown Company
Chillum isn’t a suburb of detached colonials with wide roof access. It’s a dense grid of brick rowhouses and semi-detached cape cods built between the 1940s and 1960s, many sharing chimney stacks between adjoining units. That changes the job. When we show up to a house off Riggs Road or Sargent Road, we pull the cap expecting to find a shared flue, a retrofitted liner, or someone else’s exhaust vent where it shouldn’t be. We’ve been doing Chimney Cap & Crown work in communities like this since 1999, and we know to look before we touch anything.
Wendell puts his name on every job. He answers the phone himself a lot of the time, and the price he quotes is the price on the invoice. Every completed job carries our 90-Day Done Right Promise in writing. If something isn’t right, one call brings us back at no charge. No voicemail maze, no national dispatch center, nobody showing up in an unbranded van.
We serve Chimney Cap & Crown in Chillum with crews that know local roof access patterns, the shared-stack liability questions, and the specific freeze-thaw damage profile of mortar joints in this area. Scheduling is coordinated from our Washington, DC metro office, but the crews working Chillum are local sweep techs, background-checked and in uniform, who give you a real arrival window and call if it slips.
Our Chimney Cap & Crown Services in Chillum
Cap Installation
A new cap on a Chillum chimney does more than keep rain out. In attached rowhouse pairs where an abandoned flue was capped decades ago, a properly sized cap restores drafting and keeps the neighbor’s exhaust from finding a path into your living space. We install standard and multi-flue caps with screened sides sized to the actual flue tile, not whatever was sitting there before. In Chillum, we often find the existing cap is rusted through or missing its spark arrestor entirely.
Cap Replacement
Replacing a cap in Chillum means measuring the current flue, not assuming the old cap ever fit right. Between the Sargent Road corridor and the side streets off Ager Road, we see plenty of caps that were installed for a coal-fired furnace and never resized when gas appliances took over. Cap replacement in Chillum typically runs $185-$385 for a standard single-flue cap. If we’re adding a custom base plate or working on a multi-flue stack, expect $400-$650.
Crown Repair
The crown is the sloped concrete cap that sits on top of the brick stack, sealing the gap around the flue. In Chillum, crowns crack because the DC metro area gets 50 to 70 freeze-thaw cycles every winter. Water gets into hairline cracks, freezes, expands, and breaks the crown apart. We repair crowns by removing the loose mortar, re-sloping the crown surface so water drains off, and applying a bonded crown coating that flexes with the chimney through temperature swings. Crown repair in Chillum runs $275-$550 depending on how much of the crown has spalled away.
Crown Coating
For crowns that are intact but absorbing water, a brush-on crown coating buys years of protection for less than half the cost of a full rebuild. We use flexible, waterproof crown sealants designed for masonry chimneys. In Chillum’s rowhouse pairs where one side already replaced their crown, coating the adjoining unit’s crown prevents moisture from tracking through the shared mortar bed and into the neighboring flue. Crown coating runs $225-$400 for most Chillum rooftops. Ask anyone on your street what a spalled crown looks like after a hard winter here. Then call us before yours gets there.
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 Chillum
We install and service caps from Famco and Copperfield, and when a crown repair turns into a liner conversation, we work with DuraFlex and HeatShield products. We keep common single-flue and multi-flue cap sizes stocked for Chillum jobs, which means most replacements happen in a single visit. No waiting on a freight shipment from a warehouse two states away. If the cap base needs a custom plate made for a rowhouse stack with an odd flue spacing, Wendell’s crew measures it on site and gets it fabricated locally, usually within the week.
Common Chimney Cap & Crown Problems We See in Chillum Homes
- Shared-stack cross-contamination. A renovation on one side of a rowhouse pair reroutes an exhaust or blocks a flue, and the neighbor’s fireplace starts drafting badly. The first sign is often a weird smoke smell with no fire, or a backdraft that only happens when the neighbor’s bathroom fan runs.
- Coal-era clay liners under the wrong cap. Original clay tiles sized for coal or bulky oil burners are often still in place behind a modern gas furnace. The flue is oversized, condensation forms, and the crown edge around the cap base starts spalling within a few winters.
- Freeze-thaw crown damage. Fifty to seventy freeze-thaw cycles a year attack soft lime mortar joints in 1940s and 1950s brick. The crown cracks, the cap’s mortar bed loosens, and water tracks down the flue interior to corrode the cap screen from the inside out.
- Absentee-landlord neglect. Chillum has a high rental rate and a lot of properties that changed hands without a chimney inspection. We regularly find caps that haven’t been off in twenty years, with flue conditions underneath that nobody knew about until we pulled the cap and put the camera down.
Pricing for Chimney Cap & Crown in Chillum, MD
Cap installation in Chillum runs $185-$385 for most single-flue homes. Custom base plates and multi-flue caps run $400-$650. Crown repair runs $275-$550. Crown coating runs $225-$400. If we’re doing both a cap and crown work in one visit, the combined job typically runs $350-$700, and we knock $40 off any repair over $200. Seniors and veterans always get 10% off. No trip charge inside our service county. And if another company already gave you a written estimate, bring it and we’ll give you a free second opinion. Call (240) 618-3233 before you book anything.
We Also Serve Cities Near Chillum
Top Hat Chimney’s cap and crown crews also cover Bethesda, Potomac, North Bethesda, and Chevy Chase. If you’re in a detached house near the District line or a brick colonial further out in Montgomery County, the same crew and the same 90-Day Done Right Promise applies. Call (240) 618-3233 and tell us what you’re seeing. We’ll tell you honestly whether it needs attention now or can wait a season.
Serving Chillum, MD - Our Local Coverage Area
We’re based in the Chillum 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 Cap & Crown in Chillum
You don’t, not from the ground. We measure the flue tile inside the stack and match the cap to that opening, not to whatever the previous cap was. In Chillum rowhouse pairs, a shared stack often has flues of different sizes, and a cap that fits one side won’t seal the other. The camera footage and a plain-English verdict, every time, no exceptions. Call (240) 618-3233 for a free estimate.
Yes, and it happens more often than either neighbor realizes. Removing or replacing a cap changes the pressure inside a shared stack. If your neighbor’s flue has been altered or their exhaust rerouted, your new cap can change how their fireplace draws. We always check the shared stack from both roof openings when we replace a cap on an attached Chillum property. If we find a problem on the other side, we’ll tell you and leave a written note for the neighbor, not just patch your side and walk away.
The housing stock is older, the mortar is softer lime-based mix from the 1940s and 1950s, and the roofs are much tighter. Attached rowhouses hold heat and moisture against the chimney stack differently than a detached colonial with air movement on all four sides. Add 50 to 70 freeze-thaw cycles each winter and you get crown cracks that open up in two or three years, not ten. A crown coating applied before winter closes those hairline cracks and keeps water out. Call (240) 618-3233 for an exact quote.
An unlined or improperly relined flue venting a gas appliance, usually discovered when we pull the cap and run a camera down. The brick stack looks fine from the street, but the original coal-era clay liner is cracked, offset, or missing entirely behind the cap. It’s not something we can ignore once we see it. We’ll show you the footage on our tablet and explain exactly what’s safe to leave alone and what needs to be addressed now. If it can wait, we’ll tell you it can wait.
You’ll smell it before you see it: a damp, stale odor near the fireplace when their bathroom fan runs, or smoke that backs into the room on low-draft days. We pulled a cap on a 1954 brick rowhouse pair near 23rd Avenue after a tenant reported intermittent smoke smell, and found the neighbor’s bathroom exhaust had been routed into the shared stack, pressurizing the active fireplace flue and causing backdraft. We sealed the abandoned tap and installed a new multi-flue cap with a custom base plate, restoring separate isolation for both units. If you’re smelling something that doesn’t belong, call (240) 618-3233 and we’ll find where it’s coming from.
Call Top Hat Chimney for Cap & Crown Work in Chillum
If your cap is rusted, your crown is cracked, or you’re just not sure what condition the top of your chimney is in, call (240) 618-3233. Wendell will likely be the one who picks up. We’ll schedule a time that works, show up when we say we will, and give you an honest price before any work begins. Your flue doesn’t care how the fire looks. It cares how it breathes. And in Chillum, the only way to know how yours is breathing is to pull the cap and look.
Written by Wendell Pike, Owner at Top Hat Chimney, serving Chillum, MD and surrounding communities since 1999.