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 Installation: The Crystal Lake Owner’s Guide
We stock and install Olympia Chimney-compatible chimney caps across Crystal Lake, with most replacements running $340-$620 installed depending on flue size and whether your crown needs resealing. Single-flue galvanized caps on standard Olympia Chimney round liners are typically done in under two hours; multi-flue stainless models or caps requiring crown repair take longer. We carry common Olympia Chimney cap sizes on our trucks, and most Crystal Lake jobs are scheduled within a week.
Most owners figure out their cap is shot during a routine sweep or after spotting rust streaks down the brick. Sometimes it’s a neighbor pointing out the thing’s sitting crooked after a March windstorm off the lake. The cap’s job is simple: keep water, animals, and debris out of your flue. When it fails, water hits the smoke shelf and liner directly, and that damage gets expensive fast.
Which Olympia Chimney Models This Applies To
Olympia Chimney caps aren’t one-size-fits-all, and the company has shifted its product lines enough that the cap that fit a 2015 install may not match current stock. We see this most with older Olympia Chimney round flexible liners in the 6″ and 8″ diameters, where the original termination cap was a snap-lock galvanized design that’s since been superseded by their screw-band stainless series.
To identify what you’ve got: look for the Olympia Chimney label on the liner itself, usually visible at the top of the flue or inside the firebox. The cap will have either a stamped size (6″, 7″, 8″) or a part number starting with OLY-. If the label’s rusted off, we measure the flue opening and liner OD on-site. For single-flue masonry chimneys with an Olympia Chimney liner, we typically spec a Gelco or Famco stainless cap with an Olympia Chimney-compatible base ring; for unlined masonry flues, we source direct from Olympia Chimney’s masonry cap line. We’re an independent service provider, not affiliated with Olympia Chimney, and we source through Haven’s buying network to keep pricing honest on both OEM and quality aftermarket equivalents.
Signs Your Olympia Chimney Chimney Cap Installation Is Failing

- Rust stains running down the exterior brick. The cap’s galvanized coating has failed, usually at the seams or the mesh screen welds. In Crystal Lake, we see this accelerate when caps sit below the tree line; leaf tannins and lake-effect humidity strip the finish faster than drier inland climates.
- Mesh screen clogged or collapsed. The spark arrestor mesh is designed to stop embers while venting smoke. When it plugs with creosote or gets dented by falling branches, draft drops and smoke can back up into the house. We check this with a mirror from below during every Level 2 inspection.
- Cap sitting askew or detached. The mounting brackets have corroded, or the original installer used generic screws instead of Olympia Chimney’s stainless hardware. A loose cap in a Crystal Lake winter wind becomes a projectile; we’ve found them in yards as far as thirty feet from the chimney.
- Water in the firebox or rust on the damper. The cap’s top plate is cracked, the lid-to-base seal has failed, or the cap was never properly sized to overhang the flue tile. Water hitting the smoke shelf migrates down and pools behind the damper.
- Animals or nesting debris in the flue. The mesh is missing, too large, or rotted out. Squirrels in Crystal Lake’s older neighborhoods near Three Oaks Recreation Area are persistent; a proper cap with intact 5/8″ mesh stops them cold.
Before
AfterReplacement Cost & What’s Included
| Cap Type | Typical Range | What’s Included |
|---|---|---|
| Single-flue galvanized, standard fit | $340-$420 | Cap, base ring, stainless fasteners, reseal of existing crown if sound |
| Single-flue stainless steel | $420-$540 | Cap, custom base adapter, fasteners, crown reseal, 10-year warranty on cap |
| Multi-flue stainless, custom fit | $540-$620 | Cap, mounting brackets, crown repair compound if needed, 10-year warranty |
| Crown rebuild required | Add $180-$340 | Removal of deteriorated crown, pour of new concrete crown, cap installation |
What drives the range: flue diameter, whether your existing cap is screwed or cemented in place, and crown condition. We don’t know which until we get eyes on it. Every quote is written, itemized, and signed before work starts - Haven Standard Clause 1. The cap itself carries a 10-year warranty; our labor is covered by the 365-Day Done Right Promise.
DIY or Call Us?

Here’s what you can safely check from the ground: whether the cap is visibly loose, whether mesh is intact, whether rust streaks are present. Use binoculars. Don’t climb the roof. Chimney work at height is genuinely dangerous, and a cap replacement involves working at the flue edge with tools in hand - one misstep or a rotted roof bracket, and the fall is serious.
Where DIY goes wrong: buying the wrong cap diameter (we’ve seen 7″ caps forced onto 8″ flues, creating a gap that funnels water straight in); using non-stainless fasteners that seize or fail within two seasons; and missing crown damage that’s the real source of the leak. We bring the right cap, measured to your flue, with the documentation to back it up. Call (815) 923-3185 for a written estimate - estimates are free, and we stock common Olympia Chimney-compatible sizes on our trucks.
FAQs
Galvanized caps typically last 5-8 years here; stainless models run 15-20. The difference is lake-effect humidity and freeze-thaw cycles. We see galvanized caps fail faster in shaded, north-facing exposures where moisture lingers. Call (815) 923-3185 and we’ll check what you’ve got.
Sometimes. If the mesh is damaged but the lid and base are sound, we can weld in new screen. If the base ring is rusted through or the lid is warped, replacement is the honest call - and we’ll show you the camera image so you can see why. The camera doesn’t argue - and neither does a written price.
Most single-flue replacements take 90 minutes to two hours. Multi-flue caps or jobs requiring crown repair run half a day. We schedule a two-hour window, text when the tech is en route, and leave you with photos and a written record - Haven Standard Clause 4.
We stock common 6″, 7″, and 8″ stainless caps and base adapters for Olympia Chimney liners on our trucks. Odd sizes or custom multi-flue caps we pull from Haven’s network, usually within two business days. We’ll tell you exactly which before you book.
Written by Corrine Halstead, Owner, Level Two Chimney Crystal Lake at Level Two Chimney Crystal Lake, serving Crystal Lake and nearby areas.





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