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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AfterFamco Chimney Cap & Crown in Gaithersburg: What to Know First
We provide independent Famco chimney cap and crown service in Gaithersburg, with most Famco cap replacements and crown repairs completed in a single visit and priced upfront before any work begins. A standard Famco cap installation runs $280-$520; crown repair or coating typically falls between $340-$780 depending on accessibility and flue count. We’re not here to sell you a full rebuild when a quality Famco cap and proper crown seal will solve the problem.
This page is for homeowners who already have a Famco product on their chimney and need straight answers about what’s failing, what it’ll cost, and who in Gaithersburg actually stocks the parts. If you’re in the Kentlands area, off Quince Orchard Road, or anywhere in Montgomery County with a Famco cap that’s rusting through or a crown that’s spalling, call us at (301) 719-5236. A live person answers, 24 hours a day.
How Famco Products Fail - and How We Fix Them
- Galvanized steel cap rust-through on the Famco SC-series. The SC-series single-flue caps use a galvanized finish that holds up reasonably well in dry climates but struggles with Gaithersburg’s freeze-thaw cycles and the acidic condensation from gas appliances we see in newer neighborhoods like Lakelands. We see the seams go first, right where the lid meets the skirt. Our fix: pull the cap, inspect the flue tile for spall damage underneath, and install a stainless Famco replacement or a Gelco equivalent with a lifetime warranty against rust.
- Crown wash separation on chimneys fitted with Famco multi-flue caps. The Famco MC-series and similar multi-flue units cover a broad footprint, which is good for keeping rain out but traps moisture against the crown if the cap sits too low or the crown wasn’t pitched correctly. The crown wash cracks, water gets behind it, and you get vertical cracks running down the brick. We remove the cap, grind out the failed crown material, re-pitch with a proper crown mix, and reset the cap with stainless spacers so water drains instead of pools.
- Mesh screen collapse on older Famco chimney caps. The 3/4-inch mesh on pre-2015 Famco caps fatigues at the weld points, especially where squirrels have been working at it around Olde Towne or the older homes off Diamond Avenue. A collapsed screen doesn’t just let animals in; it can block draft if the mesh falls against the flue opening. We replace with stainless mesh on a new cap body, or if the homeowner prefers, fabricate a custom screen insert that matches the existing cap dimensions.
- Flue stretcher cap seal failure on the Famco FSE-series. The FSE flue stretcher cap relies on a tension band to grip the flue tile, and in Gaithersburg’s climate that band corrodes where the stainless meets the galvanized hardware. The cap loosens, tilts, and eventually blows off in a good March wind. We see this most on two-story colonials with exposed flues. Our repair: replace the tension band with all-stainless hardware, reseat the cap with a bead of high-temp silicone at the flue joint, and add wind straps if the flue extends more than 12 inches above the crown.
- Crown coating delamination beneath Famco draft-increasing caps. The Famco Vacu-Stack and similar draft-enhancing caps create negative pressure that pulls more moisture through marginal crown coatings. Homeowners who had a “crown seal” applied by a previous sweep often find it bubbling and flaking within two seasons. We strip the failed coating back to sound concrete, apply a proper crown repair slurry, and only then reinstall the Famco cap. The draft enhancement works fine; the problem was always the crown prep underneath it.
Our Famco Chimney Cap & Crown Process
- 1
Call and schedule. A live person answers, asks whether you know your Famco model or can text a photo, and books a time that works. No deposits, no scheduling apps.
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Level-2 camera inspection on arrival. Our technician photographs the cap, crown, flue tile, and interior flue condition. You see the images on a tablet while we explain what we’re looking at. Russell Haines trained our crew to spot liner damage that other sweeps miss, and that discipline extends to crown assessment.
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Parts decision: OEM Famco or quality equivalent. If your cap is a current Famco model and you want the exact replacement, we order it. If the line is discontinued or a Gelco or Copperfield equivalent offers better longevity for your exposure, we explain the trade-off and price both. Same for crown coating materials; we stock HeatShield CrownCoat for jobs where a full rebuild isn’t warranted.
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The repair, documented. Crown repairs get ground, cleaned, and re-pitched. Cap installs get proper fasteners, wind straps where needed, and mesh tuned to your appliance type. We photograph the finished work.
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Test and verify. Gas fireplaces get a draft test; wood-burning units get a smoke-puffer check at the cap. Multi-flue caps get a water test with a hose from the ground to confirm no leaks at the crown joint.
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Written guarantee, no arguing. The 90-Day Done Right Promise covers everything we touched. If water gets in, if the cap shifts, if the crown coating fails, we come back. In writing.
What Famco Chimney Cap & Crown Costs in Gaithersburg
| Service | Typical Range | What Moves the Price |
|---|---|---|
| Famco single-flue cap replacement (stainless) | $280-$420 | Flue height, need for wind straps, accessibility from roof pitch |
| Famco multi-flue cap replacement | $380-$650 | Flue count, cap dimensions, custom mesh requirements |
| Crown repair with coating (HeatShield CrownCoat) | $340-$580 | Crown size, degree of spalling, number of flues to work around |
| Full crown rebuild with new Famco cap | $780-$1,400 | Chimney width, scaffolding needs, masonry matching |
| Flue stretcher cap reseat and seal | $180-$290 | Hardware condition, flue tile integrity, need for new tension band |
These are Gaithersburg prices for real jobs we’ve done, not national averages pulled from a website. A two-flue colonial off Goshen Road with a straightforward cap swap sits at the lower end. A three-story home in the Kentlands with a deteriorated crown, tight roof access, and a custom-fabricated multi-flue cap runs higher. We’ll give you the exact number before we start. Estimates are free. Call (301) 719-5236.
Why Gaithersburg Homeowners Call Hearthstone Chimney Co. for Famco Work
We’ve been working chimneys in Gaithersburg for over 42 years, and Famco products have been on Maryland roofs for most of that time. We know which Famco series were built with galvanized hardware that won’t survive another winter, and which ones just need a proper reseat. Our technicians carry Famco, Gelco, and Copperfield caps on the truck for common flue sizes, so most jobs finish in one visit.
The 90-Day Done Right Promise means if it’s not right, we make it right. No paperwork to dig up, no arguing about whether the leak was there before. Photos you can see, a plain-English verdict, and a number on the estimate that matches the number on the invoice. We also service DuraFlex, HeatShield, and Gelco systems, so if your Famco cap is protecting a liner or surround from another brand, we understand how the pieces work together.
Calls are answered by a live person, 24 hours a day, 7 days a week. Not a callback queue. Not an app.
FAQs
No, proper repair by an independent service provider does not void Famco’s limited warranty on materials, though Famco’s warranty only covers defects in the cap itself, not installation or subsequent damage. As an independent Famco service provider, we document our work with photos so any legitimate material claim remains clean. If your cap failed due to a manufacturing defect and it’s within the warranty period, we’ll help you understand what’s covered and what isn’t. Call (301) 719-5236 and we’ll sort it out.
Yes, for most lines. Famco discontinued several galvanized series in the mid-2010s, but we stock stainless equivalents from Famco’s current catalog and cross-compatible caps from Gelco and Copperfield that match common flue dimensions. For oddball sizes, we can fabricate a custom stainless cap in our supplier’s shop. We’ll measure your flue on site and tell you whether an exact replacement, a current Famco model, or a custom build makes the most sense.
If the crown has hairline cracks but no structural spalling or separation from the brick, a quality crown coating like HeatShield CrownCoat is appropriate. If pieces are flaking off, if you can see exposed aggregate, or if water is staining the interior firebox below, the crown needs repair or rebuild first, then coating. We make that call with the camera inspection photos, and we’ll show you exactly what we’re seeing. No coating goes on a crown that isn’t sound.
Replace it if the body is rusted, the mesh is collapsed, or the hardware is galvanized and showing corrosion. Repair or reseat is viable if you have a stainless Famco cap that’s simply loose, tilted, or missing a wind strap. We’ll tell you straight which path saves money long-term. A reseat on a failing galvanized cap is throwing good money after bad.
Most Famco cap and crown work schedules within a few business days, and we carry common cap sizes and crown repair materials on every truck. If you have active water intrusion or an animal entry through a failed cap, we prioritize those calls. Call (301) 719-5236 any time; a live person will find you the next available slot and give you a real timeframe.
Written by Russell Haines, Owner, Hearthstone Chimney Co. at Hearthstone Chimney Co., serving Gaithersburg and nearby areas.