Frequently Asked Questions

We set up floor protection, run a rotary brush and vacuum system up the flue to remove creosote buildup, then lower a camera for the Level 2 inspection. The camera shows us cracked flue tiles, gaps in mortar joints, or obstructions that a flashlight inspection would miss. In San Mateo, we regularly find heavy creosote glazing in fireplaces that burn Duraflame-style logs - they don't produce the heat needed to fully combust residue. The whole process takes 60 to 90 minutes for a standard fireplace.

The NFPA recommends annual inspection, with cleaning as needed based on what the inspection finds. Most San Mateo homeowners who use their fireplace a few times per week during the November through March burning season need cleaning every one to two years. If you're in a fog belt neighborhood near the bay where wood doesn't dry as thoroughly, or if you burn pine or eucalyptus from local tree trimming, plan on annual service. The inspection tells you for certain - we don't sell cleaning you don't need.

Stage 3 glazed creosote can form, which is highly combustible and can't be removed with standard brushing. We've found it in San Mateo homes that haven't been serviced since before 2015. Cracked flue tiles or deteriorated mortar can allow heat transfer to framing, and blocked flues from bird nests or debris can force carbon monoxide back into living spaces. The camera inspection shows you exactly what risk you're carrying - no speculation, no scare tactics.

Yes, though the work differs. Gas flues collect moisture residue and can suffer from deteriorated liners due to acidic condensate, especially in San Mateo's salt-air zones near the bay. We inspect with the camera, check for proper draft and clearances, and clean as indicated. Many gas systems in newer Menlo Park and Redwood City builds use direct-vent setups that don't need traditional sweeping - the inspection tells us which category you're in.

Clear a path to the fireplace and move any fragile items from the mantel. We'll need roof access, so unlocking gates or noting alarm codes helps. In San Mateo's older neighborhoods like Baywood or Aragon, where driveways are tight, street parking for our van works fine. We text when we're 30 minutes out - Clause 2 of the Haven Standard - so you're not waiting around.

We work with DuraFlex stainless steel liners for wood-burning applications and HeatShield cerfractory flue sealant for resurfacing damaged clay tile flues without full replacement. For chimney caps and termination fittings, we use Famco and Copperfield components - both hold up well in the Peninsula's marine climate where salt air accelerates corrosion on lesser hardware. The brand choice depends on what your flue needs, and we document the recommendation with camera evidence before quoting.

DuraFlex is a flexible stainless steel liner we insert when the existing clay flue is too damaged for repair - common in pre-1970 San Mateo homes where thermal shock from chimney fires has cracked the tiles. HeatShield is a cerfractory mixture we apply to resurface intact but pitted or gapped tile, preserving the original flue when structurally sound. The camera inspection determines which path makes sense; we don't guess, and we don't default to the more expensive option.

We install them, and we recommend Copperfield and Famco caps for San Mateo's wind and rain exposure. A proper cap with mesh sides keeps out birds, squirrels, and debris while allowing smoke to vent. We've found uncapped flues blocked by starling nests in spring and leaf buildup from bay-side oak canopies in fall. The cap pays for itself in prevention.

Every pro working under our name is required to hold the license and insurance California requires for chimney work. We verify coverage annually, and license numbers are available on request. Corrine Halstead, who leads our San Mateo branch, ensures this documentation is current for every technician on every job - it's part of the Verified crews commitment in the H.A.V.E.N. values code.

The Haven Standard is the five-point code we work to: Have it in writing (flat price, scope, warranty before work starts); Arrive on schedule (real window, named tech, text en route); Verified crews (licensed, insured, background-checked); Evidence on every job (photos, readings, documented record); No surprises (no door upsell, no scope creep). It originated from Level Two Chimney's practice, dating back to 2009, of archiving camera footage before anyone required it. That archive became Clause 4 - Evidence on every job.

We're independently owned and operated here in San Mateo, part of the Level Two Chimney family of brands. Corrine Halstead runs this branch, and our trucks, our scheduling, and our customer relationships are local. What the brand contributes is the Haven Standard we agree to work to, the documentation system that proves it, and the buying power that keeps parts and materials priced honestly.

We respond to active chimney fires, carbon monoxide alarms related to flue blockage, and sudden water intrusion from failed crowns or flashing. Our hours are Monday through Friday 7:00 AM to 8:00 PM, Saturday and Sunday 7:00 AM to 7:30 PM. A live coordinator answers calls during these hours and connects you with the local team. For life-threatening emergencies, call 911 first, then contact us for the follow-up inspection and documentation your insurance will need.

Call 911 if flames or heavy smoke are visible, then evacuate. After the fire department clears the scene, call us for a Level 2 inspection before using the fireplace again. Even a small chimney fire can crack flue tiles or damage the liner, and the camera scan is the only way to assess integrity without dismantling the chimney. We've performed these post-fire inspections throughout San Mateo, from the older masonry in Downtown to the prefab units in newer developments near Hillsdale.

Most San Mateo appointments book within one to two weeks during shoulder seasons (April through October) and two to three weeks during peak pre-winter demand (September through November). We don't promise same-day dispatch, but we do keep a cancellation list for flexible homeowners. Scheduling earlier than you think you need - especially before the first cold snap - gets you the date you want without urgency pressure.

Our cleaning work is warranted for 90 days against workmanship defects. Liners and major repairs carry manufacturer warranties - DuraFlex stainless liners typically carry a lifetime warranty, HeatShield applications are warranted for 20 years when installed to specification. Every warranty term is written on your estimate before work begins, so you know exactly what's covered and for how long. That's Clause 1: Have it in writing.

We show you the camera footage, explain what we're seeing in plain terms, and provide a separate written estimate for any repair before proceeding. Nothing is done without your approval, and we tell you plainly when work can safely wait. In San Mateo's 1960s ranch neighborhoods, we often find minor mortar deterioration that's worth monitoring annually rather than repairing immediately. The photos in your report let you track changes year to year.

We guarantee we'll leave your home as clean as we found it. Floor protection, HEPA vacuums, and boot covers are standard on every job. If we track soot or leave debris, we'll return to correct it at no charge. In 17 years of operation, this standard has been part of every job - documented, not just promised.

Yes, and you should. The emailed report includes date-stamped photos, technician notes, and any recommendations with priority ratings. Many San Mateo homeowners forwarding these to insurers after chimney fire claims, or to buyers during home sales in markets like Baywood or Aragon where older masonry is a known consideration. The documentation is yours to keep and share.

Contact us within 30 days and we'll return to address the concern. The Haven Standard's No surprises clause means we resolve issues directly, not through escalation games. Corrine Halstead reviews every callback personally, and our documentation from the original visit lets us verify what was done and what was found. Call (650) 600-3117 - we'll make it right.

Written by Corrine Halstead, Owner at Level Two Chimney San Mateo, serving San Mateo, San Carlos, Redwood City, and the Peninsula since 2009.