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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Before
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Before
AfterTrusted Chimney Cap & Crown for Gaithersburg Homeowners
A chimney cap and crown are the two pieces of your chimney that take the worst of Maryland weather, and when either fails, water gets in. In Gaithersburg, we see the same pattern every spring: freeze-thaw cycles have cracked a crown over the winter, and by March the homeowner notices a water stain on the ceiling or a musty smell near the fireplace. Level Two Chimney Gaithersburg has inspected and repaired caps and crowns across Montgomery County since 2009, with more than 38,000 chimneys documented under our camera-scan standard. A new cap or a properly rebuilt crown typically costs between $350 and $1,400 in Gaithersburg depending on size and material, and every job starts with a written price before any work begins. Call (240) 220-9395 and our team, led by Corrine Halstead, will get you on the schedule.
Key takeaways:
- Most chimney water damage in Gaithersburg traces back to a failed cap or cracked crown, not the bricks themselves.
- We document every cap and crown with a camera scan and give you the photos, not just a verbal summary.
- Written scope, written price, and written warranty before work starts. That’s how we’ve operated since 2009, and it’s Clause 1 of the Haven Standard.
What Our Chimney Cap & Crown Service Includes
Most companies treat a cap and crown as an afterthought. We don’t, because in our Chimney Cap & Crown in Gaithersburg climate, they’re the difference between a chimney that lasts forty years and one that needs a rebuild in fifteen. Here’s what we do under this service, and when each piece matters.
Cap Installation
A chimney cap is the metal covering at the top of the flue that keeps rain, snow, animals, and debris out while letting smoke and gases escape. If your chimney has no cap, or the original cap rusted through, you’re letting water directly into the flue every time it rains. We install stainless steel and copper caps sized precisely to your flue tile dimensions, not a one-size-fits-all box from a hardware store. Before installation, we camera-scan the flue so you know what the inside actually looks like.
Cap Replacement
Caps fail in predictable ways around Gaithersburg: galvanized steel rusts at the seams within eight to ten years, mesh screens tear and let birds in, and mounting brackets loosen in high wind. A replacement cap should be stainless steel or copper, and it should be sized to your flue with the right mesh opening to maintain draft. We stock caps from Olympia Chimney and Copperfield, and we’ll show you the measurement and the old cap next to the new one before we install anything.
Crown Repair
The crown is the concrete or mortar slab that caps the chimney structure itself, sloping away from the flue to shed water. The most common crown defect in Gaithersburg is cracking from freeze-thaw cycling, where water seeps into hairline cracks, freezes, expands, and widens them year after year. Small cracks can sometimes be sealed with a flexible crown coating; larger spalling and deterioration usually means removing the old crown and pouring a new one with proper overhang and a drip edge. We photograph every crack and show you exactly what we’re proposing to fix before a tool comes off the truck.
Crown Coating
When a crown is structurally intact but showing early cracking, a flexible crown coating buys years of protection without a full teardown. We use CrownCoat and similar elastomeric sealants that flex with temperature changes instead of cracking like rigid mortar. The critical step is surface preparation, which means cleaning, filling existing cracks, and priming so the coating bonds. We apply at least two coats and record the finished crown with photos included in your job record.
Multi-Flue Cap
Many Gaithersburg homes built in the 1980s and 1990s have two flues side by side on a single chimney, one for the fireplace and one for the furnace or water heater. A multi-flue cap covers both openings with one continuous unit, which is simpler than two individual caps and protects the exposed crown between them. We measure the entire crown footprint, account for chase covers if present, and install a unit that won’t obstruct either draft. If you’re not sure whether you have one flue or two, we confirm it with the camera during the inspection.
Custom Cap
Some chimneys don’t match standard cap sizes, including older Gaithersburg homes with oversized fireplaces, historic brickwork in Kentlands, and custom masonry in Lakelands. We fabricate custom stainless and copper caps to the exact flue and crown dimensions we measure on site. A custom cap also makes sense aesthetically when the chimney is visible from the street and you want something that doesn’t look like an off-the-shelf box. We source through Famco and Olympia Chimney and will show you a drawing with dimensions before fabrication begins.
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.
Brands We Service for Chimney Cap & Crown
We work with Olympia Chimney, Famco, Copperfield, and other major manufacturers, and we keep their standard sizing charts and installation specs on hand. With Olympia Chimney we’ve installed hundreds of their stainless caps in Gaithersburg, and we stock their mesh options and mounting hardware so a replacement doesn’t mean a two-week parts delay. Olympia’s locking top-mounted dampers are a common pairing when a homeowner wants both a cap and better energy efficiency in the same visit.
For copper work, Copperfield caps have been our go-to on custom jobs where appearance matters as much as function. We’ve ordered their made-to-measure units for historic homes in Olde Towne Gaithersburg and larger custom builds around Darnestown. Famco covers the tighter-budget stainless work we do frequently in townhome communities like Crown and Watkins Mill. We don’t push a brand for the sake of it; we recommend the material and build quality that matches the job. Whether you have one of these makes already or something else entirely, we can assess it, measure it, and get it done.
BeforeAfterSigns You Need Chimney Cap & Crown Right Now
- Water in the firebox after rain. This is the clearest sign your cap has failed or your crown is cracked. In Gaithersburg, most firebox water arrives through a damaged crown rather than a leaky flashing, so we check the top of the chimney first. Left unaddressed, the water saturates the firebrick and accelerates what eventually becomes a $4,000 to $8,000 rebuild.
- Rust streaks or staining on the exterior brick near the top. Rust at the crown line usually means the cap’s base or mounting hardware is corroding and washing oxidized metal down the brick face. It’s cosmetic today, but the underlying water penetration is structural. We’ll show you the source with the camera and give you a written price to stop it.
- You hear animals or birds inside the chimney. A missing or torn cap mesh lets birds, squirrels, and raccoons nest directly in the flue. Beyond the noise and the smell, nests are a chimney fire hazard and can block your draft enough to push carbon monoxide back into the house. We remove the nest, sweep the flue, and install a proper cap with stainless mesh on the same visit.
- Chunks of mortar or concrete on the roof or in the yard. Spalling is the technical term for the crown surface breaking apart in pieces, and by the time you’re seeing chunks, the damage is well past the point of a simple coating. The exposed aggregate absorbs more water with every storm, which accelerates the deterioration through the next winter. We’ll assess whether a patch, a full recoat, or a complete crown recast is the honest fix.
- Drafting problems even after a cleaning. If smoke enters the room on windy days or your fireplace has always been sluggish, the cap could be the wrong size, the mesh could be clogged, or the crown overhang could be too short. It’s worth a camera scan to see the actual restriction before spending money on a fan or a rebuild you might not need.
Our Chimney Cap & Crown Process - Step by Step
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Camera-scan inspection first. We run our camera down the flue and inspect the entire cap-and-crown assembly, taking high-resolution photos at every defect point. This is the NFPA 211 Level 2 inspection standard, and we’ve used it as our default since 2009, long before insurers asked for it. You see everything we see, and you keep a copy of the photos.
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Written scope and written price. Before we do anything, you get a written document that lists exactly what needs repair or replacement, the materials we’ll use, the price, and the timeline. It’s signed by us and given to you in advance, never after the work is underway. Clause 1 of the Haven Standard requires this: ‘Have it in writing.’
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We do the work, with a named tech. You’ll know who’s coming before they arrive, and they’ll text you when they’re on the way. The technician is background-checked, uniformed, and carries the license information with the truck. For crown work, we set up full roof protection and handle the debris removal from the site.
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Photo record delivered. When the job is done, you receive the documented photo record of the completed cap or crown, taken from the roof and from the flue interior. This is Clause 4 of the Haven Standard, and we’ve archived every job this way since 2009. You’ll see the finished work, not take our word for it.
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365-Day Done Right Promise. For a year after we leave, if any part of the installation isn’t done right, we return and make it right at no charge. No fine print, no scheduling runaround. Our Gaithersburg clients call it what it is: the reason they don’t hire a second company after the first one disappoints them.
How Much Does Chimney Cap & Crown Cost in Gaithersburg?
Here’s what we tell Gaithersburg homeowners, per our Chimney Cap & Crown cost guide, before we know the specifics of their chimney. A standard stainless steel cap installation runs $350 to $650 depending on flue size and access. A copper cap starts around $700 and goes to $1,200 or more for custom sizes. Crown coating on an otherwise sound crown costs between $450 and $900. A full crown recast, where we remove the old deteriorating slab and pour a new one with proper slope and drip edge, runs $900 to $1,400 in most Gaithersburg homes. Multi-flue caps typically land between $700 and $1,100.
What drives the price up or down: access difficulty (steep roofs in the Montgomery Village hills versus a walkable rancher), flue dimensions, whether we need a boom lift for tall chimneys, and the condition of the surrounding masonry. We don’t charge a trip fee for the estimate, and we don’t charge more because the job is urgent. Before you commit to anyone, ask for the written price, the material spec, and the warranty in writing. If you already have a written estimate from another company, bring it to us. We’ll give you a Free Second Opinion on any written estimate, no obligation, and we’ll tell you honestly if their recommendation is more than your chimney actually needs. Call (240) 220-9395 for an exact quote, no generic pricing games.
Chimney Cap & Crown Near Gaithersburg - Our Service Area
We handle Chimney Cap & Crown in Gaithersburg daily, including Kentlands, Lakelands, Washingtonian Woods, Quince Orchard, and the Olde Towne historic district. Our crews also cover Chimney Cap & Crown in Rockville and Chimney Cap & Crown in Bethesda with the same scheduling window, and we regularly serve Sterling, McLean, Reston, Herndon, Tysons Corner, Silver Spring, Ashburn, Vienna, and Falls Church. In most Gaithersburg neighborhoods we can schedule the inspection within a few business days, and the work itself is usually completed in a single visit unless we’re recasting a large crown.
Serving Gaithersburg, MD - Our Local Coverage Area
We’re based in the Gaithersburg area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions - Chimney Cap & Crown in Gaithersburg
A chimney cap is the metal cover over the flue opening that keeps rain, animals, and debris out. The crown is the concrete or mortar slab that covers the top of the chimney structure around the flue, and it’s designed to shed water away from the brick. In Rockville Chimney Cap & Crown and Gaithersburg, both need to be in good shape to prevent water damage to the chimney’s interior. We inspect both pieces on every service call with a camera scan so you can see the condition for yourself.
Most cap installations and replacements are done in a single visit of one to two hours. Crown coating takes about the same, but requires dry weather and temperatures above 40 degrees for proper curing. A full crown recast typically takes a day, including old crown removal, form work, pouring, and finishing. We give you the timeline in writing before any work begins, so there are no surprises about scheduling.
You should expect to pay $350 to $650 for a stainless cap installation, $700 to $1,200 for copper, $450 to $900 for crown coating, and $900 to $1,400 for a full crown recast in Gaithersburg. Exact pricing depends on flue dimensions, roof access, and the condition of the surrounding crown and masonry. We quote a written flat price before work starts, and we honor it. Call (240) 220-9395 for an exact quote on your chimney’s measurements and condition.
Yes, we work with Olympia Chimney, Famco, Copperfield, and other major cap manufacturers, and we stock common parts and mounting hardware for all three. If you have a cap from one of these brands that’s failed, we’ll assess whether it’s worth repairing the unit or replacing it with a better material. We’ll show you the measurements and the new cap before we install anything. Our sourcing goes through the Haven buying network, which keeps the material prices honest.
A chimney that’s actively leaking water into your home or a cap that has blown off leaving the flue open to rain is a legitimate reason to call us right away. Our phones are answered by a live person 24/7, not a voicemail, and we’ll work to get a tech to your Chimney Cap & Crown in Bethesda or Gaithersburg home as quickly as the schedule allows. For most cap and crown work, we can have someone on site within a few business days. If the damage is contained and no water is entering the house, the repair can usually wait for a standard appointment without any additional harm.
Every cap and crown job is backed by our 365-Day Done Right Promise. If any part of the installation or repair isn’t done right within a year, we come back and make it right at no charge. The written warranty is delivered to you as part of the job record, along with the photo documentation and the written scope. We also provide the manufacturer’s warranty on all cap and coating materials we install.
For most jobs, you won’t need to do much beyond making sure we have clear access to the roof or the chimney chase from the ground, and moving anything fragile away from the firebox if we’re working inside. If you have a home security system that alerts on roof motion, you may want to note our arrival time. We’ll text you when the tech is on the way, and our technician’s name and license information are on the job record we provide before work begins.
Schedule Your Chimney Cap & Crown Service in Gaithersburg Today
No matter what’s going on at the top of your chimney, we’ll show it to you on camera, write down exactly what needs fixing, and give you a price before anyone picks up a tool. That’s how Corrine Halstead and the Level Two Chimney Gaithersburg team have handled more than 38,000 chimneys since 2009, and it’s why our customers stay booked year after year. Call (240) 220-9395 for a free, no-obligation estimate, day or night.
Written by Corrine Halstead, Owner at Level Two Chimney Gaithersburg, serving Gaithersburg and surrounding Montgomery County communities since 2009.