Troubleshooting Common Chimney Issues

A fireplace is a beloved feature in many New England homes, providing warmth and comfort during the long winter months. But like any complex system, over time, problems can develop that affect its safety and efficiency.

At Admiralty Chimney, we help homeowners identify and resolve fireplace and chimney issues before they become safety hazards or lead to costly repairs. Below are some of the most common problems we see--and what you can do about them.

1. Smoke Coming Into the House

What’s going on?

If smoke enters your home instead of going up the chimney, it’s usually a drafting problem.

Common causes:

• Creosote buildup (narrows the flue)

• Blocked chimney (nests, debris, snow, or ice)

• Cold air trapped in the flue

• Improper chimney height or design

Troubleshooting tips:

• Make sure the damper is fully open before lighting a fire

• Crack a window slightly to improve airflow

• Warm the flue by lighting a rolled newspaper before starting a fire

If smoke problems persist, contact us, and we’ll come take a look at your system.

2. Excessive Creosote Buildup

What’s going on?

Creosote is a black, tar-like substance that forms when wood doesn’t burn completely. In New England’s extended burning season, creosote can accumulate quickly.

Why it matters:

• It’s highly flammable

• It reduces chimney efficiency

• It’s the leading cause of chimney fires

Troubleshooting tips:

• Burn only seasoned, dry firewood

• Avoid smoldering or low-temperature fires

• Schedule annual chimney cleanings

Creosote cannot be safely removed without professional tools, so don’t try to scrape it yourself.

3. Chimney Leaks and Water Damage

What’s going on?

Water is one of the most damaging elements for chimneys, especially with New England’s freeze-thaw cycles.

Common entry points:

• Cracked or missing chimney crown

• Damaged flashing

• Porous or deteriorating masonry

• Missing chimney cap

Troubleshooting tips:

• Look for water stains on ceilings or walls near the chimney

• Check for rusted dampers or firebox components

• Install a chimney cap to keep rain and snow out

Ignoring water damage can lead to major structural repairs.  Contact our team to schedule an inspection and determine the best course of action.

4. Cracked or Deteriorating Masonry

What’s going on?

Your brick-and-mortar chimney expands and contracts with temperature fluctuations.

Why it matters:

Over time, this can cause cracks, loose bricks, or crumbling mortar joints.

Troubleshooting tips:

• Inspect your chimney exterior each spring and fall

• Look for white staining (efflorescence), which signals moisture issues

• Address small cracks early before they worsen

Schedule any needed masonry repairs during the spring and summer months, when temperatures are warm enough for the mortar to cure properly.

5. Fireplace Won’t Stay Lit

What’s going on?

If your fire keeps going out, airflow is usually the culprit.

Possible causes:

• Closed or partially closed damper

• Blocked flue

• Negative air pressure in the home

• Oversized firebox or undersized chimney

Troubleshooting tips:

• Confirm the damper is fully open

• Use dry kindling and proper fire-building techniques

• Avoid running kitchen or bathroom exhaust fans while starting a fire

Persistent issues should be evaluated by a chimney professional. Contact our office to schedule an appointment. 

6. Strange Odors From the Fireplace

What’s going on?

Fireplace odors are common in humid New England summers or after heavy rain.

Typical causes include:

• Creosote mixing with moisture

• Animal nesting materials

• Poor ventilation

Troubleshooting tips:

• Keep the damper closed when the fireplace isn’t in use

• Install a chimney cap

• Schedule a cleaning if odors linger

>Related Reading: What’s that smell? Fireplace odor causes and solutions.

When DIY Troubleshooting Isn’t Enough

While some chimney problems can be spotted early by homeowners, most are identified by experienced professionals with the proper training and equipment. Annual chimney inspections are not just recommended; they’re essential for safety, especially in wood-burning homes.

Admiralty Chimney proudly serves homeowners throughout Southern New Hampshire and Northern Massachusetts with:

• Chimney cleanings and inspections

• Masonry repairs

• Chimney waterproofing

• Chimney caps 

• Chimney linings 

Keep Your Home Safe and Warm This Season

If you’ve noticed any of the issues above, or if it's been over a year since your last chimney cleaning and inspection, contact Admiralty Chimney today. A well-maintained chimney provides a safer and more efficient burning season.

Chimney Cleanings and Inspections in Southern NH & Northern MA

Admiralty Chimney is a trusted provider of chimney maintenance and repair services for homeowners throughout Southern New Hampshire and Northern Massachusetts. Our commitment to quality workmanship and service is reflected in our outstanding Google reviews and our A+ Better Business Bureau rating.