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.
Gelco Chimney Cap & Crown in Fairfax: What to Know First
We provide independent Gelco chimney cap and crown service in Fairfax, and most jobs are completed in a single visit. A standard Gelco cap replacement typically runs $325 to $485 installed, while crown coating or repair usually lands between $275 and $600 depending on damage. You won’t get a phone quote that changes at the door. If you own a Gelco cap or crown and something looks wrong up there, call (571) 624-2385 and we’ll tell you straight what you’re dealing with.
How Gelco Products Fail - and How We Fix Them
- Gelco cap screen tear-out on the Multi-Flue line. Squirrels and raccoons get at the mesh, and once there’s a hole the size of a quarter, they’re in. We pull the cap, strip the old screen, and re-mesh with stainless before the animal makes a nest in your flue. Seen too many Fairfax homes where a torn Gelco screen turned into a four-figure animal removal plus flue rebuild.
- Crown cracking from freeze-thaw on older Gelco crown forms. Fairfax winters swing above and below freezing enough times that untreated concrete crowns start spalling. The crack lets water sit, the water freezes, the crack widens. We grind out the loose material, bond the crack, and coat the crown with a flexible sealant that moves with the weather.
- Rust-through at the Gelco cap base where the screen meets the skirt. This is a known weak point on their older galvanized models. The screen corrodes at the weld points, the cap loosens, and wind works it free. We replace with stainless hardware and a cap with a proper lip over the flue, so it seats correctly the first time.
- Gelco caps that were never sized to the flue in the first place. A previous owner or a handyman bought a cap at the hardware store that sort of fit. It doesn’t draft properly, rain drives in sideways, and the fireplace smokes. We measure the flue, verify the appliance type, and install the right cap for the actual opening, not the one that was on sale.
- Gelco crown that held up fine, but the wash around it didn’t. The crown itself might be intact while the masonry wash around it has eroded. Water pools behind the crown and seeps down through the brick. We rebuild the wash, reset the crown if needed, and seal the joint so water has nowhere to sit.
Our Gelco Chimney Cap & Crown Process
- 1
You call (571) 624-2385. A live person picks up. You describe what you’re seeing. We ask the right questions and give you a straight quote range before anyone gets on a ladder.
- 2
Wendell or one of his crew arrives in a real window. Not a four-hour block. We call if traffic is bad. You know who’s coming.
- 3
We get on the roof and look at the actual Gelco unit. Camera inspection, photos of the cap, the crown, the flue, and the masonry around it. You see exactly what we see, on our screen or yours.
- 4
We give you the honest call. If the cap can be repaired with a new screen or re-seated, we say so. If the crown needs coating, we tell you. If everything is fine and you don’t need to spend money, we tell you that too. That’s a real phone call we make more often than you’d think.
- 5
We do the work. OEM Gelco parts when it matters for fit, quality aftermarket stainless when it’s better for longevity. Upfront price, no surprises at the door.
- 6
We test it before we leave. Draft check, water test on the crown repair, cap secured properly. Then we hand you the 90-Day Done Right Promise in writing. If it’s not right, one call brings us back.
What Gelco Chimney Cap & Crown Costs in Fairfax
Here’s the honest math for Gelco work in Fairfax:
- Cap replacement (single flue): $325 to $485 installed, depending on flue size and roof access.
- Multi-flue cap replacement: $450 to $700, custom-fitted to the flue layout.
- Crown repair and coating: $275 to $600, depending on cracking and how much wash needs rebuilding.
- Full crown rebuild (bad freeze damage): $800 to $1,400, including form work and sealant.
What moves the price: roof pitch, chimney height, whether the existing cap is seized on, and how far gone the crown is. We don’t charge a trip fee if you’re in our service county. Call (571) 624-2385 for a free estimate before burning season hits.
Why Fairfax Homeowners Call Top Hat Chimney for Gelco Work
We’ve been running brushes and fixing caps across Fairfax since 1999, and we put our name on every job. Wendell Pike, the owner, is the guy you’ll see on the roof, not a rotating cast of subcontractors. We work with Gelco products every week, and when a Gelco part isn’t the right fix, we’re the ones who’ll tell you that a DuraFlex liner or a HeatShield resurfacing job is actually what you need. We’re not married to one brand. We’re married to the chimney working right. The 90-Day Done Right Promise is in writing on every single job. If it’s not right, one call and we make it right. That’s the whole deal.
FAQs
No, as an independent Gelco service provider we follow the same installation practices the manufacturer requires, so your warranty stays intact. If a part is covered, we’ll help you document it and handle the replacement.
Most Gelco caps and screens are readily available or can be ordered within a few days, but we keep common sizes on the truck. If you need something custom, we’ll give you a real timeline before we start.
Depends on what the camera shows. If the crown is cracked but the cap is still sound, repair the crown and keep the cap. If the cap is rusted through and the crown is spalling, do both while we’re up there. We’ll show you the footage and tell you what actually needs doing.
Most cap and crown jobs are scheduled within a week, and we answer live around the clock. If a cap is loose and wind is about to take it, call us and we’ll see how soon we can get there.
Water keeps getting in. Freeze-thaw widens the crack, water reaches the flue, the flue liner rusts or the masonry spalls, and a $400 crown job becomes a $2,000 liner replacement. Catch it early, and it’s a small job. Call (571) 624-2385 for an exact quote and we’ll tell you if you can wait or not.
Written by Wendell Pike, Owner, Top Hat Chimney at Top Hat Chimney, serving Fairfax and nearby areas.





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