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.
Before
After
Before
After
Before
AfterFast, Reliable Chimney Cap & Crown Across Forest Glen
Chimney cap and crown repair in Forest Glen typically runs $350-$950, and a cracked crown or missing cap is the fastest route to water damage in a 1940s-1960s masonry chimney. We’re Top Hat Chimney, and Wendell Pike has been running crews through these neighborhoods since 1999. If water is getting past your cap or crown, the fix is rarely just one piece - it’s the cap, the crown, the flashing, and sometimes what’s happening inside the flue below. Call (240) 618-3233 and we’ll walk you through what we’re seeing and what it costs before a single tool comes off the truck.
Why Top Hat Chimney Is Forest Glen’s Preferred Chimney Cap & Crown Company
Ask anyone on your street. Wendell has been working chimneys in and around Forest Glen long enough that he runs into customers at the hardware store on Georgia Avenue and remembers their damper’s quirks. We answer the phone with a live person, twenty-four hours a day - and it may well be Wendell himself picking up. When we quote a cap replacement or crown repair over the phone, that’s the number on the invoice. No bait, no switch. No trip charge inside Montgomery County. Every job gets the 90-Day Done Right Promise in writing: if the work isn’t right, one call brings the crew back at no additional cost. That’s not a line in an ad. It’s stamped on every invoice we hand you.
Forest Glen sits in a low valley beside Sligo Creek, and that position shapes how we approach cap and crown work here. Moisture lingers longer than it does a mile uphill in Wheaton or Kensington. Crowns crack faster. Mortar washes out sooner. We see it every winter when freeze-thaw cycling sets in. Local knowledge like that is the difference between fixing the crown and missing the liner separation starting behind it.
Our Chimney Cap & Crown Services in Forest Glen
We handle the full Chimney Cap & Crown job, top to bottom - from the crown’s mortar bed to the cap screen on top. In Forest Glen, most of what we do falls into four buckets.
Cap Installation
A proper stainless steel cap keeps rain, wind-driven moisture, and animals out of the flue. In Forest Glen, where Sligo Creek’s valley position means rain drives sideways in spring storms, a bare flue is an open pipe into your chimney. We install Famco and Copperfield caps sized to your flue - single, multi-flue, or custom for odd terra cotta layouts common in 1940s Colonials off Georgia Avenue. The cap gets a screen not just for rain but for birds and squirrels. We measure before we order, so the cap fits instead of rocking in the wind.
Cap Replacement
Missing, bent, or rusted caps are the most common thing we see after a storm blows through Forest Glen. A displaced cap lets wind-driven rain straight down the flue, rusting the damper and saturating the smoke shelf. We remove the old cap, inspect the crown and flue tile beneath it, and install a replacement rated for the freeze-thaw abuse this neighborhood gives it. If the flue has multiple flues, we’ll talk through whether a multi-flue cap makes more sense than two singles.
Crown Repair
The crown is the concrete slab capping the top of the chimney. In Forest Glen, with the creek-valley moisture and hard winter freeze-thaw cycles, crowns crack along the outside edge and let water seep into the mortar bed below. We repair crowns with Gelco crack sealant when the structure is still sound, then coat the whole crown to shed water away from the flue. When the crown has spalled badly enough to expose the top course of brick, we’ll say so plainly and show you photos before recommending replacement.
Crown Coating
A crown doesn’t have to be broken to be losing its ability to shed water. Older crowns in Forest Glen’s late-1930s through early-1960s Colonials and Tudors were often poured too thin over the brick, with no drip edge. That lets water run down the chimney face instead of off the edge, accelerating efflorescence and mortar washout. We coat repaired crowns with a flexible sealant that handles expansion and contraction - the exact thing that cracks rigid crown repairs in this valley’s freeze-thaw cycle. A coated crown buys years before the next repair.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Forest Glen
We work with brands we’d put on our own houses: Famco and Copperfield caps, Gelco crown sealant and crack repair materials, and DuraFlex liners when a Forest Glen chimney needs relining as part of the cap-and-crown job. We keep common cap sizes and sealant stock on hand for fast turnaround on Forest Glen calls. A custom cap for an unusual terra cotta flue takes longer, but we’ll tell you that at the estimate, not after you’ve paid.
Common Chimney Cap & Crown Problems We See in Forest Glen Homes
- Cracked crowns from freeze-thaw cycling. Forest Glen’s position beside Sligo Creek holds ground moisture longer than higher spots, and every hard freeze pushes water deeper into hairline crown cracks until the slab starts shedding. By spring, the top course of brick below the cap is spalling.
- Wind-driven rain through missing or bent caps. Storms and high winds in the creek valley knock caps loose or bend screens flat. Water then drives straight down the flue, rusts the damper, and shows up as a brown ceiling stain from failed flashing.
- Efflorescence and mortar washout around the crown. The persistent moisture in Forest Glen’s low-lying blocks accelerates white mineral staining and mortar erosion along the crown edge. What looks like cosmetic wear is usually the first sign the crown has stopped shedding water.
- Liner separation hidden behind the crown. High Sligo Creek humidity plus 60-80-year-old terra cotta flue tiles often means liner segments have separated or collapsed inside the flue shaft - invisible from the ground. Only a camera inspection reveals it, and once documented, Montgomery County’s relining permit rules mean it can’t legally be ignored.
Pricing for Chimney Cap & Crown in Forest Glen, MD
Here’s what cap and crown work actually costs in Forest Glen, based on what we’ve quoted and completed in this neighborhood.
| Service | Typical Range in Forest Glen |
|---|---|
| Cap installation (standard single flue) | $350-$550 |
| Cap replacement with inspection | $400-$650 |
| Crown crack repair with sealant | $300-$500 |
| Crown coating over repaired crown | $250-$450 |
| Multi-flue or custom cap | $600-$950 |
What moves the number: whether the crown needs repair before a new cap sits correctly, whether we’re dealing with one flue or multiple, and whether the flue liner below needs evaluation. We don’t quote one price on the phone and another at the door. The number you hear is the number on the invoice. Estimates are free - call (240) 618-3233 and we’ll talk through what you’re seeing before scheduling anything.
We Also Serve Cities Near Forest Glen
Top Hat Chimney works cap and crown jobs throughout the close-in Maryland suburbs. We serve Forest Glen and the surrounding communities: Bethesda, Potomac, North Bethesda, and Chevy Chase. Same crews, same pricing, same live person on the phone.
Serving Forest Glen, MD - Our Local Coverage Area
We’re based in the Forest Glen 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 Forest Glen
Forest Glen’s position in a low-lying valley beside Sligo Creek holds ground moisture longer than the higher elevations of Wheaton or Kensington. That extra moisture gets into the crown’s concrete surface, and every freeze-thaw cycle in a DC winter expands that water and widens the cracks. The cycle repeats faster here, so crowns that might last 20 years on higher ground fail visibly in 10-15. The fix is early: repair cracks before they reach the mortar bed, then coat the crown so water can’t get a foothold. Call (240) 618-3233 for a free crown inspection before freeze-thaw season starts.
Almost always one or both. Water coming down the flue from a missing cap or pooling on a cracked crown eventually finds the flashing seam where the chimney meets the roof. Failed flashing lets that water wick into the ceiling below - usually in the upstairs bedroom adjacent to the chimney. On Woodstock Avenue, we found exactly that after the spring storms: a cracked crown and a displaced cap, with water driving into the flue and flashing and showing up as a ceiling stain in the bedroom. We pulled the old cap, repaired the crown with Gelco sealant, installed a Famco stainless cap with a custom screen, then ran a Level 2 camera inspection to check the liner. If you’re seeing a ceiling stain, call us before it spreads.
You don’t, from the ground. A separated or collapsed terra cotta liner segment sits inside the flue shaft, behind the crown and out of sight. What you may notice is draft problems, an odd smell, or water staining that never quite dries out. In Forest Glen, the combination of creek-valley humidity and liners that are now past their 60-80 year service life makes separation common. The only way to document it is a Level 2 camera inspection, which we include with any crown or cap job where the liner looks suspect. Once documented, Montgomery County’s relining permit rules mean the problem can’t be ignored. We’ll show you the camera footage and give you a plain-English verdict - every time, no exceptions.
Three things. Walk far enough back to see the whole crown: look for missing or bent cap, dark cracks in the crown surface, and white mineral staining running down the brick below. From inside, shine a flashlight up the firebox and look for water streaks or rust on the damper. And check the ceiling around the chimney for any stain that appeared after a storm. If any of those are present, hold off on the first fire until we’ve looked at it. Once a year, burn or no burn. Chimneys break in the off-season too. Call (240) 618-3233 and we’ll come out and look.
Technically yes, but you shouldn’t have it done that way. A new cap sitting on a cracked crown is like a new roof on a rotten deck - the cap keeps rain out of the flue, but water still gets into the crown’s cracks and destroys the brick below. Any cap installation or replacement we do starts with a crown inspection. If the crown needs work, we’ll show you photos and give you the number before we touch it. If it doesn’t, we’ll tell you that too. Your flue doesn’t care how the fire looks. It cares how it breathes.
Contact Top Hat Chimney for Chimney Cap & Crown in Forest Glen
If your crown is cracked, your cap is missing, or you’ve got a ceiling stain that wasn’t there before the last storm, call us. Wendell and his crew have been fixing cap and crown problems in Forest Glen since 1999, and we’ll tell you straight whether the job needs doing now or can wait. Estimates are free. The number you hear is the number you pay. Call (240) 618-3233 and we’ll get you scheduled.
Written by Wendell Pike, Owner at Top Hat Chimney, serving Forest Glen and the surrounding Montgomery County communities since 1999.