Common Chimney Problems

05/16/24

Chimneys are valuable home features that can improve indoor air quality and keep your home warm and cozy in the winter without having to rely on costly heating systems. However, despite their welcoming functions, chimneys are one of the more overlooked areas of home maintenance — it’s easy to forgo a routine chimney inspection when the fireplace seems to be working fine. However, even the most minor problem can spiral into major repair needs.

While prioritizing a bi-annual inspection and general maintenance is essential, knowing what to look for and when to reach out to a repair service is just as important.

This article discusses the most common chimney problems so you can keep your chimney in good working order all year round.

Creosote Buildup

Creosote is the by-product of the burning fuel used in the fireplace. When you burn wood, the smoke travels up the flue and leaves traces of creosote along the way. Burning green or unseasoned wood can cause glazed creosote to form. Over time, the creosote will build up and increase the risk of chimney fires that can cause extensive property damage.

The signs of creosote buildup include:

• Black soot in the fireplace.
• Reduced drafting in the fireplace.
• Extremely black smoke bellows from the chimney.
• Less ash and more wood in the fireplace after use.

While a buildup of creosote requires prompt attention, any amount of creosote can cause problems. So, if you note any of these signs, contact professional repair services for a thorough cleaning.

Damaged Flashing

Flashing is vital in keeping the chimney and surrounding roof area watertight. Sturdy flashing also ensures energy efficiency. As a result, damaged flashing can lead to water damage.

The signs of damaged flashing can include:

• Water leaks.
• Musty or moldy odors.
• Mold and mildew growth.
• Rust stains in the firebox.
• Water stains on surrounding walls.

Often, you can spot flashing damages by inspecting the structure from your roof. If the flashing pulls away from the chimney or shows other visible signs of damage, you should contact a repair service.

Spalling Bricks

Bricks are naturally porous, allowing water to penetrate the surface. The water can then freeze and expand. The bricks’ face will then begin to break off, a process known as spalling.

If you notice the bricks are spalling, a repair service can replace the damaged bricks to reinforce your chimney. Neglecting this problem can also increase the risks of a chimney fire. Moreover, spalling can worsen, eventually compromising your chimney’s structural integrity, resulting in the entire structure falling and causing immense property damage.

Damaged Mortar Joints

Chimney mortar joints help hold the bricks together, ensuring a watertight seal. Mortar joints also help prevent bricks from cracking and spalling. Still, these joints can deteriorate through the same water freezing and thawing cycle that causes spalling in bricks.

The best way to identify damaged mortar joints is by inspecting the chimney from your home’s roof. If there are spaces between the bricks where chunks of mortar have fallen out, contact a professional service for this common chimney repair.

Cracks in the Chimney Crown

The chimney crown is the very top part of the structure that prevents moisture from entering your home. Crowns are often constructed from cement. Chimney crown cracks are usually the result of improper installation, although aging materials are another common cause.

Identifying cracks requires an inspection. In some cases, surface cracks are no cause for concern. However, professional chimney repair experts can determine the severity of cracks to determine whether crown repairs are necessary. A crumbling crown won’t keep moisture out, potentially leading to water damage. So, it’s best to contact an expert service if you notice any cracks in this area of your chimney.

Cracked Chimney Flue

The flue is the inner structure of the chimney. Flues have varying designs and can be made with terracotta clay, concrete or steel liner. With clay or concrete, cracks can occur in a chimney fire or if heat causes the liner to expand unevenly. In this case, uneven pressure causes cracking.

The signs of cracks in the flue include:

• Pieces of clay or concrete in the fireplace.
• Visible cracks at the flue entrance.
• Soot buildup on the chimney.

Beyond leading to additional damage, a cracked flue can cause carbon monoxide leaks in your home. So, if you suspect your flue is damaged, contact a professional repair service as soon as possible and avoid using your fireplace in the meantime.

Blockages

Wild animals and nests are among the most common causes of blockages. Squirrels and chimney swift birds can enter the chimney and cause obstructions. If large trees surround your home, twigs, leaves and tree branches can also fall into the chimney and cause blockages.

The signs of a blocked chimney can include:

• Water leaks.
• Debris falling into the fireplace.
• White residue buildup on the flue liner.
• A strong smell of smoke when the fireplace is in use.

It’s generally best to contact wildlife removal services or professional chimney services for a thorough chimney cleaning that will remove any obstructions. Even though you can attempt to clear the blockage independently, professionals know what to look for and have the right tools.

Damper Problems

Damper faults are also common chimney issues. The damper is a vital fireplace component, crucial in managing airflow and controlling the draft. These components can experience several problems that can impact the chimney’s performance. Wear and tear, improper installation and faulty control mechanisms are common damper faults.

The signs of a damaged damper include:

• Noticeable heat loss.
• Difficulty operating the part.
• Rust and corrosion on the compartment.
• Excessive smoke when the fireplace is in use.

Often, faulty dampers are simply off track and need to be reset. Still, if you notice rust and corrosion or resetting the component doesn’t improve performance, contact a repair service to replace the part.

Contact Chimney.com for Reliable Chimney Repairs

At Chimney.com, our experts have over 35 years of experience offering reliable chimney repairs to North Virginia, Maryland and Washington, D.C. Whether your chimney’s flashing needs replacing or you’ve spotted cracks in the flue, we can restore your chimney to optimal function.

Our experts provide various services beyond repairs, including professional inspection, cleaning and relining. We’ll inspect the structure to recommend the most suitable repairs. Whether we need to repair or replace parts, we use the highest quality materials to ensure longevity.

Contact us online to schedule quality chimney maintenance and repair services.