Chimney, Dryer Vent and Air Duct FAQ

The NFPA 211 standard calls for chimneys, fireplaces and vents to be inspected once a year, and the inspection shows whether a sweep is needed. Wood-burning fireplaces usually build up soot and creosote faster than gas appliances. Our certified technicians will tell you what they find and whether cleaning makes sense.

Creosote is a tar-like residue that forms inside a chimney when wood smoke cools. It builds up in layers and can catch fire if it's left in place. Regular sweeping removes it before it becomes a hazard.

Yes. Gas and oil appliances don't produce creosote the way wood does, but their flues can still become blocked by debris or nests, or damaged over time. The yearly inspection recommended by NFPA 211 applies to vents for these appliances as well.

A Level 1 inspection is for chimneys where nothing has changed. A Level 2 inspection is called for when the system changes, such as a new appliance or a fuel switch, or when the home is being sold. A Level 3 inspection is used when a hidden hazard has to be reached by opening part of the chimney or building.

Under the inspection levels chimney professionals use, a home sale is one of the situations that calls for a Level 2 inspection. It gives buyers and sellers a clear picture of the chimney's condition before closing. Let us know about the sale when you book so we schedule the right inspection.

In New York City, the chimney has to be evaluated as part of an oil-to-gas boiler conversion. A new liner is often needed because gas exhaust produces acidic condensate that can corrode a masonry flue. We can inspect the chimney and install a liner if one is required.

Common signs include crumbling mortar, loose or cracked bricks, water stains near the fireplace, rust on the damper, and pieces of tile or masonry falling into the firebox. An inspection will show what's causing the problem. Depending on what we find, the fix may be a repair, waterproofing, a new cap or chase cover, or rebuilding part of the chimney.

A chimney cap sits on top of the flue and helps keep out rain, animals and debris. A chase cover seals the top of a framed chimney chase so water doesn't get inside. Both help prevent water damage and blockages.

According to the U.S. Fire Administration, failure to clean is the leading factor contributing to clothes dryer fires in homes. Lint builds up in the vent line over time, beyond what the lint trap catches. Signs it's time include clothes taking longer to dry, a hot laundry room or a burning smell.

The U.S. EPA advises cleaning air ducts when there is substantial visible mold growth, signs of vermin, or excessive dust and debris. The EPA also notes that duct cleaning has not been shown to prevent health problems. We'll look at your system and tell you honestly whether cleaning is worthwhile.

The EPA advises consumers to be careful with chemical treatments in ductwork. We'll talk through any treatment with you before using it and explain why it might or might not help. The EPA also suggests researching the process before responding to very cheap advertised duct cleaning offers.

Please stop using the fireplace or stove at least a day ahead so the firebox is cool. Clear a path to the fireplace, dryer or vents, and move fragile items off the mantel. If we need roof access, have any keys or permissions ready.

Most sweeps and dryer vent cleanings take one to two hours, while inspections, repairs and liner work vary with the job. We'll give you an estimate of the time when you book. We lay down drop cloths and use vacuum equipment to keep soot and dust contained, and we clean up the work area before we leave.

Please keep pets in a closed room away from the work area during the visit. Our equipment can be noisy, and doors may be open while we work. It also keeps your pets away from soot and debris.

Many rowhouses and apartment buildings reach the roof through a hatch or a shared stairway, so we may need a key or permission from the building owner or management. Please arrange this before your appointment. For apartment buildings, we suggest scheduling chimney work before New York City's heat season starts on October 1, since owners must keep apartments heated through May 31.