Olympia Chimney Chimney Cap Installation: The Houston Owner’s Guide
We stock and install Olympia Chimney-compatible chimney caps across Houston, with most replacements running $340-$680 installed depending on flue size and whether your crown needs resealing. Same-day installation is available when you call before noon, and our trucks carry the common 8″, 10″, and 13″ round sizes plus standard 9″×13″ and 13″×17″ rectangular covers. Most Houston homeowners discover their cap has failed during a hard rain, when water starts dripping into the firebox, or when they notice rust stains weeping down the brick from a cap that’s been quietly corroding since the last hurricane season.
Which Olympia Chimney Models This Applies To
Olympia Chimney manufactures caps to fit their own 304-alloy stainless steel liner systems, but the critical detail is whether your flue is a round single-wall, round double-wall, or rectangular terracotta flue that the cap needs to cover. The model number you’re looking for is stamped on the underside lip of your existing cap, or on a tag affixed to the mesh screen, starting with prefixes like OL-, OC-, or OS- depending on the series year. Pre-2015 caps used a lighter 24-gauge mesh that dents easily from acorn impacts, common in Houston’s oak-heavy neighborhoods like The Heights and Oak Forest, while current production uses 22-gauge with a tighter 5/8″ weave.
We carry both OEM Olympia caps and equivalent-grade caps from Gelco and Famco that match the 304 stainless spec and carry the same 20-year rust-through warranty. The aftermarket route saves roughly $60-$90 on parts without sacrificing fit, though some homeowners in Memorial and River Oaks prefer OEM for resale documentation. Measure your flue’s outer dimensions with a tape measure, not the inner liner, since the cap’s base flange needs to overhang by at least 1″ on all sides to keep wind-driven rain out during a Gulf Coast squall.
Signs Your Olympia Chimney Chimney Cap Installation Is Failing
- Rust stains running down the brickwork. Houston’s humidity cycles, especially the February-May dew point swings, accelerate corrosion at the cap’s welded seams. Once you see orange streaking, the metal has thinned enough that salt air from Galveston Bay will finish the job within two seasons.
- Mesh screen pulled away from the frame or sagging. Squirrels and roof rats in neighborhoods near Buffalo Bayou can deform lighter-gauge mesh trying to enter. A gap larger than a quarter lets nesting material accumulate, which is what actually creates the fire hazard, not the animal itself.
- Water pooling in the firebox after rain. The cap’s lid may look intact from the ground, but the collar that slips over the flue tile can crack at the seam from thermal cycling, invisible until you’re on the roof. We’ve found this exact failure in at least a dozen Spring Branch homes built in the 1980s.
- Cap sitting crooked or lifted on one side. Wind gusts over 50 mph, routine during Houston’s spring storm season, can torque a cap that’s missing even one of its corner strapping screws. A cap that’s shifted even slightly funnels water directly into the flue instead of shedding it.
- Visible holes or daylight through the mesh. Creosote combustion, rare but possible with airtight inserts, can burn through mesh from the inside out. More commonly, we see this in caps installed too close to the flue opening, where corrosive flue gases concentrate instead of dispersing.
Replacement Cost & What’s Included
| Component | Typical Range (Houston) |
|---|---|
| Olympia Chimney-compatible cap, standard size | $180-$320 |
| Installation labor, single flue | $160-$280 |
| Crown resealing (if needed) | $85-$150 |
| Flue tile repair, minor | $120-$200 |
| Total installed, most jobs | $340-$680 |
What drives the range: flue height above the roofline (two-story homes in Bellaire or West University add ladder time), whether the existing cap was secured with Tapcon screws into concrete crown or cheap masonry nails that pulled loose, and if the flue tile itself has spalled at the top edge. Our estimate includes removal and disposal of the old cap, new stainless steel fasteners, a bead of high-temp silicone at the collar joint, and documentation photos for your records. Every cap installation carries our 90-Day Done Right Promise, in writing, no arguing, if water gets past it, we come back.
DIY or Call Us?
There’s no spring tension or electrical hazard in a chimney cap replacement, but there’s also no forgiving a fall. Houston’s clay tile roofs in Montrose and the older parts of Katy are unforgiving even at a gentle pitch, and a cap on a two-story flue puts you 25 feet up with nothing but a ladder and hope. What you can safely check from the ground: whether the cap is visibly shifted, whether mesh gaps are large enough to see from the yard with binoculars, and whether rust stains are new or old by comparing to photos from last year.
What goes wrong with DIY: buying the wrong collar diameter because the flue was relined and you measured the outer terracotta instead of the inner stainless, or using galvanized hardware that’ll rust solid in eighteen months. We’ve retrieved more than one homeowner’s dropped screwdriver from a firebox. If you’re not already comfortable walking your roof, call us at (877) 516-5603. We’ll price it upfront, show up when we say, and you stay on the ground.
FAQs
A 304-stainless cap in Houston’s climate typically lasts 12-18 years if the mesh isn’t damaged, though caps within ten miles of the Ship Channel or Galveston Bay see salt air corrosion closer to the 10-year mark. The 20-year manufacturer warranty covers rust-through, not denting or animal damage. Call (877) 516-5603 and we’ll check yours during a seasonal inspection, estimates are free.
Minor mesh dents can sometimes be reworked, but once the frame welds crack or the collar separates from the lid, the cap’s geometry is compromised and repair costs approach replacement. We’ve tried rewelding, the heat warps the fit and water finds the gap every time. For an honest assessment of yours, call (877) 516-5603.
Most single-flue cap replacements take 45 minutes to an hour and a half, including setup and cleanup. If we discover flue tile damage once the old cap is off, we’ll show you the photo and quote the repair before proceeding, no surprises on the bill. Same-day service is available when you call before noon.
We carry the six most common sizes that cover roughly 85% of Houston’s housing stock, including the 8″ and 10″ rounds and 9″×13″ rectangular that Olympia shipped with their liner systems through the mid-2000s. For oddball sizes or custom chase covers, we measure, order, and return within 48 hours. Call (877) 516-5603 with your flue dimensions and we’ll confirm what we have.
Hearthstone Chimney Co. of Houston is an independent service provider, not affiliated with Olympia Chimney. We do stock and install professional-grade caps from DuraFlex, HeatShield, Gelco, Famco, and Copperfield as well.
Ready to stop the drip and keep the wildlife out? Call (877) 516-5603 for a free estimate. A live person answers every call, 24 hours a day, 7 days a week. We’ll be there when we say, and the number on the estimate is the number on the invoice.
Written by Dale Hutchins, Owner & Master Sweep, Hearthstone Chimney Co. of Houston at Hearthstone Chimney Co. of Houston, serving Houston and nearby areas.