DuraFlex Chimney Cap & Crown Nationwide

DuraFlex Chimney Cap & Crown in Flushing: What to Know First

We provide independent DuraFlex chimney cap and crown service in Flushing, with most jobs completed in a single visit and upfront pricing agreed before we start. A standard DuraFlex cap replacement runs $280-$520; crown repair or coating typically falls between $340-$780 depending on access and flue count. We don’t quote over a vague description - we inspect, photograph, and give you a number you can hold us to.

Call (516) 206-6672

This page is for Flushing homeowners who already have a DuraFlex liner or cap system and need honest work on the crown or cap without being sold a full rebuild they don’t need. If you’re in a pre-war brick row house near Kissena Park or a 1960s split-level off Union Turnpike, we’ve likely serviced your exact chimney type. Call (516) 206-6672 - a live person answers, 24 hours a day.

How DuraFlex Products Fail - and How We Fix Them

• DuraFlex SW (stainless wall) multi-flue caps: weld-seam corrosion at the skirt-to-screen joint. The SW series uses a lighter-gauge stainless wrap that holds up well internally but can weep moisture at the skirt weld after 8-12 winters of Flushing’s freeze-thaw cycling, especially where road salt aerosol drifts in from the Van Wyck. We remove the cap, re-weld or replace the skirt section with a heavier aftermarket equivalent, and reset with a bead of high-temp silicone that flexes with the metal.
• DuraFlex Pro: base-ring distortion causing cap tilt and pooled water. The Pro’s base ring is engineered for a tight friction fit, but in Flushing’s older masonry with irregular crown profiles, that tight fit becomes a lever point. Thermal expansion pops the ring slightly oval; the cap tilts; water pools on the low side and breaches the crown in 2-3 seasons. We spot-grind the crown true, install a custom-fabricated base plate where needed, and reset the Pro cap with stainless wedge anchors rather than relying on friction alone.
• DuraFlex relining caps: premature mesh screen clogging in oak-burning households. Flushing’s older homes near Bowne Park often burn seasoned oak for long shoulder-season fires. The DuraFlex relining cap’s standard 3/4-inch mesh is correct for spark arresting but traps flaky creosote particles that smaller-flake oak produces. We swap to a 5/8-inch mesh on replacement, or add a removable screen band for annual cleaning access - both keep airflow up and back-drafting down.
• DuraFlex crown wash separation on poured-concrete crowns common to 1940s Flushing construction. The original poured crowns in this neighborhood were rarely steel-reinforced and often only 2 inches thick at the edge. DuraFlex’s crown coating bonds well to sound concrete but can’t bridge active cracks wider than 1/8 inch. We chase cracks with a grinder, inject flexible masonry epoxy, then apply DuraFlex-compatible crown coat in two lifts - not one thick layer that skins over and traps moisture.
• DuraFlex single-flue caps: wind-driven rain infiltration on low-slope installations. The standard single-flue cap with a 3/12 pitch sheds normal rain fine, but Flushing’s nor’easter exposure - particularly on homes above the terminal moraine ridge line near Flushing Cemetery - can drive water uphill. We specify the optional 5/12 high-slope lid for exposed installations, or fabricate a custom skirt extension from 24-gauge stainless where the flue projection is unusually short.

Our DuraFlex Chimney Cap & Crown Process

1. 1
   Call and schedule. A live person answers, notes your DuraFlex model if you know it, and books a window. We don’t ask you to diagnose your own chimney.
2. 2
   Level-2 camera inspection with photo documentation. Our tech runs a camera up the flue and photographs the crown, cap, and flue top from inside and out. You see what we see - no verbal description substituted for evidence.
3. 3
   Parts decision: OEM DuraFlex or quality aftermarket. If your cap is under warranty and the failure is a known defect, we source OEM. For out-of-warranty work, we often recommend Gelco or Famco equivalents with heavier gauge stainless at comparable or lower cost, and we explain the trade-off plain.
4. 4
   The repair, done right. Crown work gets ground, cleaned, epoxy-injected where cracked, and coated in two lifts. Cap replacements get true-level installation with proper clearances and spark-arrestor mesh suited to your fuel type.
5. 5
   Post-repair draft test and documentation. We verify draft with a manometer, photograph the finished work, and leave you with a written report and your 90-Day Done Right Promise.
6. 6
   Cleanup and walkthrough. We haul old material, lay down fresh drop cloths, and walk you through the photos before we ask for anything signed.

What DuraFlex Chimney Cap & Crown Costs in Flushing

These are Flushing-market ranges based on jobs we’ve completed in the last 18 months. Your exact price depends on what the camera shows, not what we guess over the phone. We give you the number upfront and stick to it. Call (516) 206-6672 for a free estimate - no charge to look, no pressure to book.

Why Flushing Homeowners Call Hearthstone Chimney Co. for DuraFlex Work

We’ve been answering the phone with a live person for over 42 years, and we’ve been working on DuraFlex systems since the brand first showed up in Flushing relining jobs in the late 1990s. Russell Haines and our crew know the difference between a DuraFlex SW and a DuraFlex Pro without reading the stamp, and we know which failures are worth a warranty call and which need a craftsman’s fix.

Our 90-Day Done Right Promise means if it’s not right, we make it right - in writing, no arguing, no paperwork chase. Most jobs finish in one visit because our trucks carry DuraFlex, HeatShield, Gelco, and Famco inventory, and our technicians are background-checked, uniformed, and trained to document everything they find. Photos you can see, a plain-English verdict, and a square deal: no surprises on the bill. A clean flue isn’t a luxury. It’s just the job done right.

FAQs