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.
Fast, Reliable Chimney Repair Across Forest Glen
Chimney repair in Forest Glen usually runs between $350 and $2,800 depending on what’s actually wrong, and most jobs are done within a week of the first inspection. We’ve been inside hundreds of chimneys in this neighborhood, and the pattern here is consistent: moisture from Sligo Creek works into old mortar, freeze-thaw does the rest, and by the time you see a stain or smell a draft, the damage has already started. Wendell Pike and his crew know Forest Glen’s housing stock, its storm exposure, and the difference between a chimney that needs attention now and one that can wait another season. Call (240) 618-3233 for a straight answer, an upfront price, and a free estimate before a single tool comes off the truck.
Why Top Hat Chimney Is Forest Glen’s Preferred Chimney Repair Company
Top Hat Chimney has been owner-operated since 1999, and Wendell puts his name on every job. That matters in a place like Forest Glen, where neighbors talk, and where a crew that did sloppy work last spring is one that gets remembered at the next community meeting. We don’t rotate in a different stranger each season. The Chimney Cleaning & Sweep - Forest Glen tech who shows up at your door is part of a small, local crew that has worked this corner of Montgomery County long enough to know its quirks.
Forest Glen homes skew toward brick Colonials and Tudor Revivals from the late 1930s through the early 1960s. Most still have their original single-wythe masonry chimneys and terra cotta flue liners. That means the repair calls we get here are rarely about one isolated problem. They’re about how water, age, and weather have been working together for decades. We answer every call live, 24/7, and it may well be Wendell himself picking up.
Every job we complete in Forest Glen is backed by our 90-Day Done Right Promise, in writing on every invoice. If the work isn’t right, one call brings the crew back at no additional cost. We also offer a free second opinion on any competing written estimate, no trip charge for calls inside the county, and a 10% discount for seniors and veterans. And $40 off any repair over $200 always applies.
Our Chimney Repair Services in Forest Glen
We handle the full range of Chimney Repair work, but in Forest Glen four services come up again and again. Here’s what each one involves and why this neighborhood sees so much of it.
Flashing Repair
Flashing is the metal seal where the chimney meets the roof, and in Forest Glen it fails more often than homeowners expect. Wind-driven rain from nor’easters works its way behind old flashing, runs down inside the chase, and shows up as a brown ceiling stain that gets blamed on the roof. It’s usually the chimney. We reseat or replace flashing with Copperfield materials, seal the joint properly, and stop the water at the source. On a brick Colonial near Sligo Creek, a homeowner called about a ceiling stain after a nor’easter. Our tech found the flashing had pulled away from the Chimney Cap & Crown in Forest Glen, letting wind-driven rain run inside the chase. We reseated the flashing, replaced the cracked crown with a new Gelco crown, and sealed the joint with Copperfield flashing, and the stain dried out and the fireplace drafted clean by the first freeze.

Mortar Repointing
Repointing is the process of removing deteriorated mortar joints and packing in fresh mortar. In Forest Glen it’s a constant need. The creek-valley moisture keeps old mortar damp longer than it should, and freeze-thaw cycles break it down faster than on higher ground in Wheaton or Kensington. A typical repointing job on a Forest Glen chimney runs $800 to $2,200 depending on how many sides are affected and how high up the damage goes. Skip it, and water keeps finding its way in.

Spalling Brick Repair
Spalling is when brick faces crack, flake, and pop off in pieces. It’s not cosmetic. Once the protective face of a brick is gone, the softer interior absorbs water even faster, and the damage accelerates. Forest Glen’s brick homes, most of them 60 to 85 years old, are right in the window where spalling becomes a visible problem. We remove and replace damaged brick, match the existing mortar color as closely as the material allows, and address the moisture entry that started it.

Chimney Waterproofing
Waterproofing is the most underrated chimney repair in Forest Glen. A breathable masonry water repellent applied to the exterior brick keeps rain and creek-valley humidity out while still letting moisture escape from inside. It won’t fix already-damaged brick or cracked crowns, but it slows the deterioration pattern dramatically. For a 1950s Tudor that’s been losing mortar year over year, waterproofing after repointing is often the difference between a chimney that lasts another decade and one that needs rebuilding sooner than it should. Expect to pay $450 to $900 for a full waterproofing treatment on a standard Forest Glen chimney.

What happens when you call
- 1
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 Forest Glen
We install and service products from manufacturers we’ve worked with for years, including Copperfield flashing, Gelco chimney crowns, and DuraFlex liners. We keep common parts and materials stocked for quick turnaround on Forest Glen jobs, so you’re not waiting weeks for a crown or a flashing kit to ship. When a repair calls for a liner upgrade or a new cap, we quote the brand by name and show you exactly what’s going in. No generic parts, no mystery substitutions.
Common Chimney Repair Problems We See in Forest Glen Homes
- Wind-driven rain through displaced caps. Severe storms knock caps loose or shift them just enough to let rain pour straight down the flue. The water soaks the liner, corrodes the damper, and often gets mistaken for a simple leak. A loose cap is a fifteen-minute fix if caught early and a much bigger job if ignored.
- Cracked crowns from repeated freeze-thaw. The crown is the concrete or mortar cap on top of the chimney. Forest Glen gets 15 to 20 inches of snow a typical winter, with hard freezes that split worn crowns wide open. Water enters the smoke chamber, and efflorescence shows up on the firebox walls. A cracked crown needs replacement, not patchwork.
- Flashing failures that look like roof leaks. This is the one we see most often after big storms. Stains appear on the ceiling near the chimney, and homeowners call a roofer. The roofer says the roof is fine. The actual problem is water getting behind the flashing, running down the chimney chase, and pooling inside the ceiling. Repairing the flashing fixes the stain.
- Deteriorating terra cotta flue liners. Forest Glen’s 1940s-1960s chimneys often still have their original terra cotta flue liners, now well past their service life. Cracks and separations in the liner can’t be seen from the firebox. Only a camera inspection reveals them. Once documented, Montgomery County’s current relining permit requirements mean the repair can’t legally be ignored.
Pricing for Chimney Repair in Forest Glen, MD
Here’s what Forest Glen homeowners can expect to pay for common chimney repairs:
- Flashing repair: $350 to $900, depending on access and how much flashing needs replacing.
- Mortar repointing: $800 to $2,200 for a typical Forest Glen chimney.
- Spalling brick repair: $500 to $1,500 per affected area, depending on brick count and height.
- Chimney waterproofing: $450 to $900 for a full treatment on a standard single-flue chimney.
- Full chimney rebuilding above the roofline: $1,800 to $4,500, depending on height, access, and materials.
Every quote is delivered upfront before work begins, and the number on the phone is the number on the invoice. No trip charge applies for calls inside the county. Call (240) 618-3233 for an exact quote on your Forest Glen chimney, and remember the $40 discount on any repair over $200.
We Also Serve Cities Near Forest Glen
If you live in Forest Glen or the surrounding communities, Wendell and his crew cover your street too. We serve Chimney Repair in Forest Glen along with Bethesda, Potomac, North Bethesda, and Chevy Chase. The same local crew, the same upfront pricing, and the same 90-Day Done Right Promise apply no matter which of our neighborhoods you call from.
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 Repair in Forest Glen
Because the crown is outside, not inside, and it takes the brunt of every freeze-thaw cycle. Forest Glen’s creek-valley position holds moisture longer, which means crowns here crack sooner than on higher ground. A firebox can look perfect while water pours through a cracked crown into the smoke chamber above it. We check the crown on every inspection whether you ask or not. Call (240) 618-3233 to have yours looked at.
The telltale sign is a brown stain on the ceiling near the chimney, often blamed on the roof. If the stain appears within days of a heavy wind-driven rain, flashing is the likely culprit. Other signs include damp drywall around the chimney chase, a musty smell in the attic near the flue, or visible gaps between the flashing and the brick. The fix is reseating and resealing the flashing, not replacing the roof. A camera inspection of the chase confirms it in minutes.
Yes. Humid air carries smoke odor more intensely, and when a flue liner is cracked or a damper isn’t sealing, the smell comes back only when moisture is high. This is a distinctive Forest Glen pattern because of the creek-valley humidity. The fix is usually a Chimney Liner & Rebuild in Forest Glen plus a properly adjusted damper. Call us before you spend on air fresheners. We’ll find the actual source and quote the repair fairly.
It can, if the repair addresses the water entry causing the spalling. Repointing damaged joints and applying a breathable water repellent slows the deterioration significantly. But spalling brick that’s already flaking can’t be reversed. Those brick faces need replacement before the damage spreads. In a 1950s Tudor on Forest Glen’s damp streets, early repair is the difference between a few hundred dollars in brick work and a partial chimney rebuild later.
Yes, and we recommend it for every repair estimate in Forest Glen. The combination of Sligo Creek humidity and decades-old terra cotta liners has caused liner segments to separate or collapse inside the flue shaft, invisible from the firebox. A camera shows exactly what’s happening inside the flue before any repair is quoted. We include camera inspection with every repair estimate and show you the footage. No guesswork, no surprises. Call (240) 618-3233 to schedule one.
Written by Wendell Pike, Owner at Top Hat Chimney, serving Forest Glen since 1999.





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