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 Gaithersburg Owner’s Guide
We stock and install Olympia Chimney-compatible chimney caps throughout Gaithersburg, with typical installed pricing running $285 to $520 depending on flue size and cap model. Most jobs are done same-visit once we’re on the roof, since our trucks carry the common Olympia Chimney sizes. You usually find out the cap failed the same way every Gaithersburg homeowner does: after a storm, you spot a piece of metal in the yard, or water starts streaking the brick near the crown, or a bird gets into the fireplace and can’t get out. The cap is the one part of the chimney system that takes every weather hit directly, and around here it takes a beating.
Which Olympia Chimney Models This Applies To
Olympia Chimney builds caps for their stainless steel chimney systems, most commonly the Goliath, Odyssey, and Ventis lines, and those caps are not interchangeable. The outside diameter of your flue pipe is the number that matters: Goliath caps fit a 13-inch OD, the Ventis line runs 6-, 7-, and 8-inch ODs, and Odyssey air-cooled caps are matched to specific housing collars. The fastest way to identify yours is to look for the Olympia stamp on the cap skirt or on the chimney pipe label in the attic chase. We’re an independent service provider, not an Olympia Chimney dealer, but we source OEM Olympia parts through Haven’s buying network, which keeps the price on a genuine part closer to what a quality aftermarket equivalent would cost. For caps, we generally recommend OEM when the chimney system is under fifteen years old, simply because the slip-fit tolerances on Olympia caps are tighter than generic rain caps. After that, aftermarket options from Famco or Gelco can often do the same job for less.
Signs Your Olympia Chimney Chimney Cap Installation Is Failing

- Water stains on the ceiling near the chimney chase. This usually means the cap’s storm collar or the cap-to-pipe seam has opened up, and rain is running down the outside of the flue inside the chase. We see this a lot in older Gaithersburg brick-front colonials near the Rio Washingtonian Center corridor.
- Rust streaks down the chimney pipe or cap skirt. The cap’s galvanized base or fasteners are giving up. Once the rust reaches the seam, moisture moves down into the chase, and the cap is past repair.
- Debris, twigs, or nesting material in the firebox. The mesh screening on the cap has torn or pulled away. In Gaithersburg, starlings and squirrels are the usual culprits, and once they get in, they don’t leave quietly.
- A chimney that drafts poorly or smokes back into the room. A partially collapsed cap or a mesh screen clogged with creosote restricts airflow. This can also be a sign of cap sizing that was wrong from the start, a particular issue on Olympia systems where the cap was swapped as a generic replacement at some point.
- You can see the cap is missing, tipped, or sitting off-center from the ground. By the time it’s visible, the flue has been exposed to Maryland rain for weeks. The crown and the flue tile are next.
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AfterReplacement Cost & What’s Included
In Gaithersburg, expect to pay between $285 and $520 installed for an Olympia Chimney-compatible cap, with the price set by three things: flue outside diameter, whether you need a standard single-flue cap or a custom chase cover, and whether we’re also replacing the storm collar or resealing the crown. That price includes the part, the roof work, and our documented photo record of what was there before and what’s there after. We hand you a written price before anything goes on the truck, and that price is the price: no surprise line items. Every cap installation carries the 365-Day Done Right Promise. If the cap shifts, leaks, or fails under normal use within a year, we come back and make it right at no charge.
DIY or Call Us?

You can safely do two things from the ground: check for visible rust or an off-center cap with binoculars, and check your firebox for debris or water stains after a heavy rain. What you should not do is get on the roof. Roof work without fall protection is how homeowners get hurt, and a chimney cap that won’t seat correctly against an Olympia slip-fit collar is a problem you won’t spot until the next storm shows you where the leak is. The camera doesn’t guess. Neither do we. If you want to know what you’re actually working with, call (240) 220-9395 and we’ll pull photos and measurements before we quote anything.
FAQs
In Gaithersburg, a correctly installed Olympia Chimney cap typically lasts 10 to 15 years before the mesh starts to fail or the base seams show rust. Homes closer to the Potomac drainage or with heavy tree cover lose caps faster, mostly from falling branches and moisture loading.
Sometimes, yes: a torn mesh screen can be re-screened, and a bent cap skirt can often be straightened in place. Once the base seam is rusted through or the cap is warped against the flue, repair stops making sense and replacement is the honest call. Call (240) 220-9395 and we’ll look at photos or come out and tell you which one applies.
A standard single-flue cap swap takes 45 to 90 minutes once we’re on the roof. If we’re also replacing a storm collar, resealing the crown, or building a custom chase cover, plan for a half day.
We stock the common Olympia Chimney Goliath and Ventis sizes on the truck, and we also carry Famco and Gelco equivalents for older systems. If we don’t have your size when we inspect, we order it and schedule the install as soon as it lands, usually within a week.
If your Olympia Chimney cap is done and the rain is finding its way in, call Level Two Chimney Gaithersburg at (240) 220-9395. We’ll give you a written price before any work starts and a photo record when it’s finished. Free estimates, no pressure.
Written by Corrine Halstead, Owner, Level Two Chimney Gaithersburg at Level Two Chimney Gaithersburg, serving Gaithersburg and nearby areas.





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