Service area · Burlington County

Chimney Services in Cinnaminson, NJ

Many of Cinnaminson's fireplaces were built in the mid-century decades, and the houses around them have often been sealed and upgraded since. A fireplace that once drew well can start spilling smoke for reasons that have little to do with the brick.

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Chimney profile
What the numbers suggest for chimneys in Cinnaminson
Working through a smoky fireplace, in order
When the fireplace itself is the cause
Local questions
Sources

Chimney profile: Cinnaminson

Census estimates for 6,320 housing units (6,196 occupied).

When homes were built

Before 1940 5%
1940–59 21%
1960–79 41%
1980–99 10%
2000 or later 25%

How occupied homes are heated

Utility gas 86%
Fuel oil 3%
Electricity 10%
Propane 0%
Wood 0%
Other or none 1%

Type of housing

Single-family, detached 75%
Single-family, attached 9%
2–4 units 2%
5+ units 14%

Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, tables B25034, B25040 and B25024, via Census Reporter. Estimates have margins of error; small categories are approximate.

What the numbers suggest for chimneys in Cinnaminson

In Cinnaminson, Census estimates date about 41% of the 6,320 housing units to 1960 through 1979 and 21% to 1940 through 1959, with 25% built since 2000. The mid-century share points to many masonry fireplaces with clay-lined flues, and the newer homes add factory-built units.

Roughly 86% of occupied homes use utility gas for heat and 10% use electricity. In an older house, a gas furnace or water heater may share the chimney with the fireplace in a separate flue, and both draw their air from inside the house.

About 75% of units are detached. These estimates sketch the township; they cannot tell you how any one chimney is doing.

Working through a smoky fireplace, in order

Smoke in the room has several possible causes, and they are easiest to sort from the simplest to the most involved. Stop at the step that solves it.

Is the damper fully open?A damper only partly open, or rusted in a half-closed position, restricts the flue. CSIA lists opening the damper fully among its basic steps for a well-supplied fire.
Does cracking a window help?If the smoke stops when you open a window near the fireplace, the house is short of air. Buckley Rumford's technical discussion notes that modern houses are tighter and full of powerful exhaust fans, which can pull air down the chimney. Turn off kitchen and bath fans and the dryer while the fire burns and watch for a change.
Is another fireplace or appliance competing?CSIA's FAQ explains that a fire in one fireplace can create negative pressure that draws smoke down an unused chimney elsewhere in the house.
Is the wood dry and the fire hot?EPA Burn Wise recommends wood below 20% moisture and hot fires rather than smoldering ones, and notes that a correctly installed and operated appliance should produce little smoke.
Is something in the flue or at the top?A nest, a clogged cap screen or heavy creosote can choke the flue. This step needs an inspection, with a camera when the flue allows.

When the fireplace itself is the cause

If the simple checks do not explain it, the fireplace's proportions may. The Brick Industry Association's Technical Note 19 sizes the flue against the fireplace opening and chimney height, and notes that, for the same flue size, a taller chimney produces a stronger draw. A rough, poorly shaped smoke chamber or a damaged damper can also slow smoke on its way out.

Fixes range from changing a restrictive cap or parging the smoke chamber to adding makeup air, which is a job for your HVAC contractor. The inspection's findings and photos point to which of these fits your fireplace.

Other appliances on the same chimney

When a furnace or water heater vents through a flue in the same chimney, the house pressure that pushes fireplace smoke indoors can affect those appliances too. If you have needed to open a window to keep the fireplace drawing, mention it to your heating contractor as well, and keep working carbon monoxide alarms in the house. The carbon monoxide guide explains why venting problems matter beyond the smell of smoke.

Local questions

Why does my fireplace smoke only when I first light it?

A cold flue draws weakly until it warms. If the smoke clears once the fire is established and the room has enough air, start-up is likely the issue. If it continues, work through the other checks.

Is smoke in the room dangerous?

Smoke contains carbon monoxide and fine particles. When smoke enters the room fire after fire, stop using the fireplace and have it checked. If a CO alarm goes off or someone feels sick, get everyone outside and call 911.

Our fireplace drew fine for years. What changed?

Typical culprits are new windows or insulation, a stronger range hood, a new furnace, or a blocked cap. Listing recent changes to the house helps narrow the cause.

Will installing glass doors stop the smoke?

Not reliably. Many door makers require the doors to stay open while a fire burns, so they do not narrow the opening when it matters. Find the cause of the smoke first.

Sources

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