DuraFlex Chimney Cap & Crown Nationwide

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

We provide independent DuraFlex chimney cap and crown service in Leesburg, with most DuraFlex cap replacements and crown repairs completed in a single visit. Our upfront pricing means the estimate we give is the invoice you pay, and every DuraFlex job carries our 90-Day Done Right Promise in writing. If you are seeing rust streaks, water stains on your ceiling near the chimney, or a cap that has pulled loose after a Loudoun County windstorm, call (571) 701-7519. A live person answers, and we will schedule a Level-2 camera inspection so you see exactly what your flue looks like before any work begins.

Call (571) 701-7519

How DuraFlex Products Fail - and How We Fix Them

• DuraFlex SW 304/316 flexible liners: The termination cap on these stainless liners can work loose at the storm collar where it meets the masonry crown. In Leesburg, the freeze-thaw cycle between late November and early March opens hairline crown cracks that let water run behind the cap flange. We remove the cap, reseat the storm collar with high-temp silicone, and either reseal the existing crown with CrownSeal or pour a new concrete crown if the structural integrity is gone.
• DuraFlex relining caps with built-in spark arrestors: The mesh on these caps packs with creosote faster than standalone Gelco or Famco caps because the arrestor screen sits in the direct exhaust path. We see this especially in older Leesburg homes burning seasoned oak in open hearths. Our fix is a thorough hot-water rotary cleaning of the mesh during the cap service, or upgrading to a Gelco cap with external spark arrestor if the homeowner wants longer intervals between cleanings.
• DuraFlex oval-to-round adapters on factory-built chimneys: The adapter plate beneath the cap can corrode at the weld seam where condensation collects. This is not a cap failure, but it looks like one because water drips from the cap edge. We diagnose this with the camera before touching the cap, then replace the adapter with an OEM DuraFlex part or a compatible Olympia Chimney adapter if the flue geometry allows.
• DuraFlex direct-vent termination caps on gas inserts: The plastic weep holes in these caps clog with pollen and leaf debris from Leesburg’s heavy oak and maple canopy. Water backs up into the cap body and discolors the siding below. We clear the weeps, replace any cracked cap with a DuraFlex-compatible Famco metal cap, and seal the joint with proper storm collar flashing.
• DuraFlex multi-flue caps on historic Leesburg chimneys: These need custom sizing because the flue spacing on pre-1950s brick does not match modern standard cap dimensions. We measure each flue center-to-center with a story pole, then order from Copperfield or fabricate a custom cap in-house rather than forcing an ill-fitting stock unit that leaks in six months.

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 Level-2 inspection with camera.
2. 2
   On-site diagnosis. Our technician photographs the cap, crown, and flue interior. You see the images on a tablet while we explain what failed and why.
3. 3
   Parts decision. We quote OEM DuraFlex parts and quality aftermarket alternatives from Gelco, Famco, or Copperfield when they fit better or last longer. You choose before we order.
4. 4
   Repair or replacement. Most DuraFlex cap and crown jobs finish in one visit. Crown repairs cure overnight; we schedule a return only if a full crown pour is needed.
5. 5
   Post-repair test. We run a smoke test or video scan to confirm the cap seals and the flue drafts properly.
6. 6
   Documentation and guarantee. You receive photos, a plain-English report, and our 90-Day Done Right Promise in writing.

What DuraFlex Chimney Cap & Crown Costs in Leesburg

What moves the price: accessibility of your roof pitch, whether the flue tile needs repair before the new cap seats, and if we are matching an unusual DuraFlex termination geometry. We give you the full number before any work starts. Call (571) 701-7519 for a free estimate.

Why Leesburg Homeowners Call Hearthstone Chimney Co. for DuraFlex Work

We have been on roofs in Leesburg for over 42 years, and Russell Haines has spent the better part of two decades serving homeowners here, including the older colonials near Morven Park where chimneys work hard every winter. Our 90-Day Done Right Promise is in writing with no arguing. Our technicians are background-checked, uniformed, and trained on DuraFlex termination specifics, not just generic cap installation. When a DuraFlex part is back-ordered, we know which HeatShield or Gelco alternative will fit without voiding your liner warranty. A live person answers our phone 24 hours a day. We will be there when we say, and the number on the estimate is the number on the invoice.

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