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.
Olympia Chimney Chimney Cap & Crown in Cambridge: What to Know First
We provide independent Olympia Chimney chimney cap and crown service in Cambridge, from cap replacement on a rusted Olympia Chimney 304 stainless multi-flue to crown coating on a poured concrete stack in Harvard Square. Most Olympia Chimney cap and crown jobs we book are completed in a single visit, with upfront pricing agreed before we start. In Cambridge, where salt air off the Charles and freeze-thaw cycles punish every roof penetration, a compromised cap or crown is not a cosmetic issue - it is how water gets in and destroys the flue from the top down.
This page is for Olympia Chimney owners in Cambridge who want the repair done with the correct parts, documented with photos, and backed by a guarantee in writing. Call (857) 392-4709 to speak with a live person, any hour.
How Olympia Chimney Products Fail - and How We Fix Them
- 304 stainless mesh corrosion on coastal-exposed caps. The Olympia Chimney 304 stainless series is built well, but in Cambridge neighborhoods within a half-mile of the Charles River - think Cambridgeport and East Cambridge - we see accelerated mesh corrosion after seven to ten years. Salt-laden air pits the weave, and once the mesh opens, squirrels and rain enter together. We replace with 316 stainless or marine-grade equivalent, depending on exposure, and document the before condition so you understand why 304 reached its limit here.
- Galvanized steel cap seam separation in North Cambridge triple-deckers. Older Olympia Chimney galvanized caps, common on 1980s and 1990s installations, develop seam lift at the corners where the lid meets the skirt. The galvanized coating thins, the seam caulking hardens, and wind-driven rain funnels straight onto the flue tile. We remove the failed cap, inspect the flue top for spalling, and install a properly sized replacement with a deeper overhang and drip edge.
- Crown wash cracking on flat-top masonry chimneys. Olympia Chimney caps sit on crowns, and when the crown was poured without proper slope or expansion joints - typical in Cambridge’s 1890s to 1920s housing stock - water ponds beneath the cap flange. We see this regularly along Brattle Street and in Mid-Cambridge. The freeze-thaw cycle lifts the cap, cracks the crown, and now water has two paths in. We repair the crown with proper slope and bonding, then reset or replace the cap with bedding in a flexible sealant.
- Multi-flue cap sizing mismatches after liner upgrades. Homeowners who installed an Olympia Chimney flexible liner kit sometimes find their existing multi-flue cap no longer seats correctly - the new liner termination changes the height and spacing. A cap that sits too low creates a downdraft trap; one that sits too high leaves the crown exposed. We measure flue-to-flue spacing, liner termination height, and crown dimensions on site, then specify a cap that fits the assembly as it exists now, not as it was originally built.
- Crown coating failure from incompatible product application. Some Cambridge homeowners have had a previous contractor brush a generic elastomeric over an Olympia Chimney crown, or over a crown that was never properly prepped. The coating traps moisture, accelerates spalling, and peels within two winters. When we apply crown coating, we use products rated for chimney crown application - sometimes HeatShield CrownCoat, sometimes a compatible alternative depending on substrate condition - after mechanical prep and moisture testing. The right product, applied to the right surface, lasts.
Our Olympia Chimney Chimney Cap & Crown Process
- 1
Call and schedule. A live person answers, confirms your address in Cambridge, and books a window. We do not use apps or callback queues.
- 2
Level-2 camera inspection on arrival. Our technician photographs the crown, cap, flue top, and visible liner termination from the roof and from inside the firebox. You see the images on a tablet before any work is discussed.
- 3
Plain-English verdict and parts decision. We identify your Olympia Chimney model or series if labeled, assess whether OEM or quality aftermarket parts make sense, and explain the trade-off. Some Olympia Chimney caps are still available OEM; others, particularly older galvanized lines, are better served by a compatible 316 stainless unit from our Gelco or Famco inventory.
- 4
Upfront pricing, then repair. The estimate is the invoice. For cap replacement, we remove the old unit, inspect the flue tile and crown substrate, install the new cap with proper bedding and fasteners, and seal the interface. For crown repair, we prep, patch or coat, and allow proper cure time before resetting the cap.
- 5
Post-repair documentation and test. We run a final camera pass to confirm clear flue passage, photograph the completed work, and leave you with the images and a written description.
- 6
90-Day Done Right Promise in writing. If anything is not right, we return and make it right. No paperwork to dig up, no argument.
What Olympia Chimney Chimney Cap & Crown Costs in Cambridge
These are the ranges we see for Olympia Chimney cap and crown work in Cambridge, based on actual jobs completed:
| Service | Typical Range | What Moves the Price |
|---|---|---|
| Single-flue cap replacement (stainless) | $280 - $450 | Flue diameter, roof access difficulty, whether the flue tile needs minor repair |
| Multi-flue cap replacement | $420 - $680 | Flue count, span width, custom vs. stock sizing |
| Crown repair with coating | $380 - $650 | Crown size, depth of cracks, need for structural patch vs. surface coating |
| Crown rebuild (partial, with cap reset) | $850 - $1,400 | Linear feet of crown, scaffolding needs, masonry matching |
| Cap + crown combined service | $650 - $1,100 | Extent of crown damage, cap series and material grade |
Every estimate is free, itemized, and firm. We do not quote low to get in the door, then find “surprise” problems. If it needs doing, we will tell you. If it does not, we will tell you that too. Call (857) 392-4709 for an exact quote.
Why Cambridge Homeowners Call Hearthstone Chimney Co. for Olympia Chimney Work
We are an independent Olympia Chimney service provider - not affiliated with or authorized by the manufacturer - and we believe that is an advantage. We source the part that fits your chimney, whether it is an OEM Olympia Chimney cap, a Gelco marine-grade equivalent for salt-air exposure, or a Famco custom-fabricated unit for an unusual flue spacing. Our technicians carry DuraFlex, HeatShield, and Gelco materials on the truck, so most jobs finish in one visit without waiting for parts.
The 90-Day Done Right Promise governs every repair: Krafted right, Every time, Your home first, Standing behind it. Russell Haines keeps a handwritten list of every chimney his team has serviced in Cambridge - not because he has to, but because the work is remembered. Calls are answered by a live person, 24 hours a day. Background-checked, uniformed technicians. The number on the estimate is the number on the invoice. We have been here for over 42 years, and we plan to be here when your cap needs attention again.
FAQs
Installing a non-OEM cap does not automatically void an Olympia Chimney liner or appliance warranty, but warranty coverage on the cap itself applies only to OEM parts. We explain which components are covered by which warranty before you decide, and we document the existing serial numbers when present.
A 304 stainless Olympia Chimney cap typically lasts 10 to 15 years inland, but in Cambridge within a half-mile of the Charles, we see 7 to 10 years before mesh corrosion or fastener weakening appears. Upgrading to 316 stainless or marine-grade adds roughly 5 years of service life. Call (857) 392-4709 to discuss whether your exposure warrants the upgrade.
Olympia Chimney has discontinued some galvanized and early stainless lines. We carry cross-reference dimensions for common discontinued models and can often source a compatible Gelco or Famco replacement that fits the existing flue and crown footprint without modification.
We determine this with a hammer test and moisture meter on site. Surface hairline cracks in sound concrete qualify for coating. Cracks wider than one-eighth inch, spalling, or a separated cap flange indicate structural repair is needed first. We show you the difference on camera before quoting either approach.
For exterior-only cap or crown work, you do not need to be present if roof access is straightforward and payment is arranged in advance. For any interior inspection or camera work, we need access to the firebox and damper area. Most Cambridge homeowners prefer to be present for the initial inspection so they can see the photos and understand the verdict.
Ready to get your Olympia Chimney cap or crown sorted? Call (857) 392-4709 any time - a live person will answer, book your free estimate, and give you a straight answer about what your chimney actually needs.
Written by Russell Haines, Owner, Hearthstone Chimney Co. at Hearthstone Chimney Co., serving Cambridge and nearby areas.





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