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.
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AfterDuraFlex Chimney Cleaning & Sweep in Leesburg: What to Know First
We provide independent DuraFlex chimney cleaning and sweep services across Leesburg, with most jobs completed in a single visit and upfront pricing agreed before we start. A standard DuraFlex sweep and Level 1 inspection runs between $199 and $289 in this market, depending on creosote buildup and accessibility. We’re not affiliated with DuraFlex, but we’ve cleaned, inspected, and repaired their liners and components in Leesburg homes for the better part of two decades.
This page is for homeowners with DuraFlex chimney liners, caps, or venting who need annual maintenance, suspect a performance issue, or want a camera inspection before burning season. If your fireplace or stove isn’t drafting the way it used to, or you’ve noticed unusual odors or staining, call us at (571) 701-7519. A live person answers, 24 hours a day.
How DuraFlex Products Fail - and How We Fix Them
- DuraFlex SS (stainless steel liner): Creosote bridging in corrugated valleys. The corrugated wall design that makes DuraFlex SS flexible also creates low spots where glazed creosote hardens into ridges. In Leesburg, where homeowners often burn seasoned oak from Loudoun County lots, we see this bridging after two skipped seasons. We break it with mechanical whipping heads sized to the liner diameter, then verify clearance with a camera before signing off.
- DuraFlex SW (smooth-wall liner): Thermal expansion joint fatigue at the collar. The smooth-wall construction reduces creosote adhesion, but the expansion joint at the top collar can work loose after repeated heat cycles. During a sweep, we inspect this joint with a telescoping camera. If it’s gapped, we reseat with OEM-grade compression hardware rather than generic clamps, which fatigue faster.
- DuraFlex Pro: Factory insulation compression from improper support spacing. The Pro line’s wrapped insulation settles if support bands exceed 6-foot spacing, creating cold zones that accelerate creosote formation. We document support spacing during every Level 2 inspection and recommend re-banding before the insulation degrades further. This is a common finding in Leesburg’s 1980s and 1990s ranch homes with tall, straight flue runs.
- DuraFlex aluminum venting (gas applications): Corrosion at the condensate drip leg. Aluminum DuraFlex venting for gas appliances corrodes where condensate pools, especially in Leesburg’s humid summers when systems sit idle. We remove the drip leg during cleaning, check wall thickness with a borescope, and replace with schedule-40 aluminum or stainless if pitting exceeds 1/32 inch. Generic flex won’t meet the appliance’s listed venting requirements.
- DuraFlex cap and termination screens: Mesh over-firing from pellet stoves. The factory 5/8-inch mesh on DuraFlex pellet terminations clogs with fly ash faster than chimney caps from Gelco or Olympia. We clean the mesh with compressed air and a soft brush rather than wire, which distorts the openings, and we stock replacement screens in common sizes so you’re not waiting on a parts order.
Our DuraFlex Chimney Cleaning & Sweep Process
- 1
Call intake with burn history. We ask what you’re burning, how often, and what you’ve noticed. Russell’s line: “Tell me what you are burning and how often, and I can tell you what your chimney looks like before I even climb up.” This shapes whether we dispatch for a sweep or recommend a Level 2 inspection first.
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Arrival and protective setup. Our technician lays floor protection from the door to the hearth, inspects the appliance and connector pipe for visible damage, and confirms the DuraFlex model from any markings or prior documentation.
- 3
Mechanical cleaning with DuraFlex-appropriate tools. We select whips, chains, or poly brushes based on liner material - stainless gets steel chain for heavy creosote, smooth-wall gets poly to protect the finish, aluminum gets soft-bristle only. No one-size-fits-all approach.
- 4
Camera inspection and documentation. Every DuraFlex job ends with a forward-view camera run. You see the footage. We explain what we found in plain English, flag anything that needs attention, and note what can wait.
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Written verdict and pricing for any follow-up. If we find a joint gap, support issue, or corrosion, we provide a written estimate with no pressure. The 90-Day Done Right Promise covers the sweep itself and any repair we perform.
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Cleanup and scheduling. We HEPA-vac the firebox and surrounding area, remove our protection, and leave the hearth cleaner than we found it. Most Leesburg customers book next year’s sweep before we leave.
What DuraFlex Chimney Cleaning & Sweep Costs in Leesburg
| Service | Typical Range | What Moves the Price |
|---|---|---|
| Level 1 sweep and inspection (DuraFlex SS/SW) | $199 - $289 | Flue height, creosote density, accessibility from roof or hearth |
| Level 2 camera inspection (required for real estate or suspected damage) | $289 - $379 | Number of appliances, attic or crawl access, photo report detail |
| Glazed creosote removal (DuraFlex SS with bridging) | $150 - $250 add-on | Extent of buildup, chemical pretreatment needed |
| DuraFlex cap/screen replacement | $180 - $340 | Model, mesh size, whether collar reseating is needed |
| Expansion joint repair (DuraFlex SW) | $220 - $400 | Accessibility, OEM vs. quality aftermarket hardware |
Prices reflect Leesburg’s market - we’re not the cheapest, and we don’t aim to be. The estimate we give is the invoice you pay. Call (571) 701-7519 for an exact quote; estimates are free.
Why Leesburg Homeowners Call Hearthstone Chimney Co. for DuraFlex Work
We’ve been in Leesburg long enough to know which DuraFlex installations came from which local retailers in the 1990s and 2000s, and what shortcuts were common then. Our 90-Day Done Right Promise means if the sweep doesn’t leave your flue right, we come back - in writing, no arguing. Russell Haines has spent nearly twenty years on roofs in this town, including the older colonials near Morven Park where chimneys work hard every winter.
When a DuraFlex component needs more than cleaning, we don’t force a brand mismatch. We also work with HeatShield for refractory repair and Gelco for cap replacements, so the solution fits the problem rather than whatever we have on the truck. Background-checked, uniformed technicians. Most jobs done in one visit. A live person on the phone, every hour of every day.
FAQs
No. Routine cleaning by a qualified professional does not void DuraFlex’s limited lifetime warranty on stainless liners. The warranty does require that the liner be installed and maintained according to manufacturer specifications, which is why we document our work with photos and note any deviations we find. If you’re unsure whether your original installation was listed and warrantied, we can check during the inspection. Call (571) 701-7519 to schedule.
For wood-burning systems with DuraFlex SS or SW liners, we recommend annual inspection and cleaning as needed. In Leesburg’s climate, where humid summers can accelerate corrosion in gas venting and heavy oak use builds creosote steadily, we’ve found that going two seasons without a sweep often leads to glazed buildup that costs more to remove. Pellet systems with DuraFlex venting may need screen cleaning twice yearly. Call us and we’ll set a schedule that matches your actual burn habits.
We stock common DuraFlex replacement parts - caps, screens, support bands, and collar hardware - and we source OEM or quality aftermarket equivalents for less common items. You don’t need to track down part numbers or wait on shipping. If your repair requires a DuraFlex-specific component we don’t carry, we’ll order it and return to complete the job, usually within a week. The 90-Day Done Right Promise covers the full repair, not just the cleaning.
A well-maintained DuraFlex stainless liner can last decades, but age alone isn’t the deciding factor. During our camera inspection, we check for wall thinning, seam separation, and support failure. If the liner is structurally sound and properly supported, cleaning and continued use is the right call. If we find perforation, extensive corrosion, or insulation degradation, we’ll show you the footage and explain replacement options with HeatShield or a new DuraFlex system. No recommendation without evidence you can see. Call (571) 701-7519 for a free evaluation.
Most Leesburg appointments are available within one to two weeks during shoulder seasons, and two to three weeks once burning season is underway. We don’t promise same-day dispatch, but we do answer the phone live 24/7, and we’ll tell you honestly where you fit in the schedule. If you smell smoke in the house or see visible damage, we treat that as urgent. Call (571) 701-7519 and we’ll find the first available slot.
Written by Russell Haines, Owner, Hearthstone Chimney Co. at Hearthstone Chimney Co., serving Leesburg and nearby areas.