Do you really need a chimney cap?

If your chimney doesn’t have a cap, you might be wondering if it’s really necessary. The short answer is yes. A chimney cap is a simple and effective way to protect your chimney and home. In New Hampshire, where we deal with heavy rain, snow, and freezing temperatures, that protection matters even more.

What is it and what does it do?

A chimney cap is a protective stainless steel covering installed at the top of your chimney. Typically, it includes a mesh screen and a solid top that allows smoke to escape while keeping unwanted elements (water, debris, critters) out.

Chimney Cap Benefits:

1. Preventing Water Damage

You may not know this, but water is one of the biggest threats to your chimney. If you don’t have a chimney cap, rain and snow can easily get inside it. Over time, this leads to moisture damage within the flue and masonry, and eventually to deterioration and costly repairs. A chimney cap acts like a roof for your chimney, helping keep it dry year-round.

2. Keeping Critters Out of Your Chimney

Birds, squirrels, raccoons, and other small animals often see a chimney as a safe place to nest, especially during cold weather. Without a cap, it’s only a matter of time before an uninvited guest moves in yours. Once inside, these critters can cause serious problems, including fire hazards and carbon monoxide buildup.

3. Blocking Debris

Small branches, twigs, leaves, and other debris can easily get into an open chimney, creating a fire hazard. By restricting airflow, debris buildup can also allow dangerous carbon monoxide gas to back up into your home. A chimney cap helps prevent debris buildup, reducing the risk of fire and improving ventilation.

4. Reducing Downdrafts

Brrr. Strong winds can push cold air down your chimney, creating drafts and decreasing energy efficiency. Installing a chimney cap helps reduce downdrafts, improving the performance of your fireplace or heating system.

5. Decreasing the Risk of a Roof Fire 

The mesh screen on a chimney cap can also act as a spark guard, preventing hot embers from escaping onto your roof. This added layer of protection can help reduce the risk of accidental roof or exterior fires.

What Happens If You Don’t Have a Chimney Cap?

It might not seem like a big deal at first, but not having a chimney cap can lead to serious (and expensive) problems over time, including water damage to your chimney liner, masonry, and even your home’s interior. And in New Hampshire’s climate, freeze-thaw cycles can exacerbate moisture damage, accelerating cracking and structural issues.

Small Investment. Big Benefits.

Compared to the cost of removing animal nests or repairing water damage, a chimney cap is a small investment that can extend your chimney’s lifespan and improve your home's overall comfort and safety.

Chimney Cap Installation in Southern NH & Northern MA

For over 20 years, Admiralty Chimney has been a trusted installer of chimney caps in southern New Hampshire and northern Massachusetts. Visit our website today to learn more about our services or schedule an appointment.

Protect Your Chimney From Water Damage

When most homeowners think about chimney damage, fire comes to mind. While a fire can cause devastating damage, there’s another culprit that quietly deteriorates chimneys before homeowners realize there is a problem:  water. 

At Admiralty Chimney, we’ve seen how quickly moisture can compromise a chimney’s structural integrity. For this reason, it’s important to know the common signs of water damage and how to prevent it. 

But first, let’s discuss WHY chimneys are so susceptible to water damage.

Chimneys are built with porous materials--like brick, mortar, and concrete--that absorb water.   During the winter months, absorbed water goes through repeated freeze-thaw cycles. Over time, it causes bricks to crack, mortar to crumble, and chimney liners to deteriorate .

Signs Your Chimney Has Water Damage

Water damage doesn’t always show up immediately, so be on the lookout for these common signs:

• Cracked or missing mortar joints

• Spalling bricks (flaking or popping surfaces)

• White staining (efflorescence) on the chimney exterior

• Rust on the damper or firebox

• Water stains on ceilings and walls

• Musty odors coming from the fireplace

• Leaning or tilting chimney structure

If you notice any of these signs, contact our chimney experts so we can take action before the problem worsens.

How Water Gets Into Your Chimney

Several factors allow water to enter your chimney system:

• Lack of a waterproofing sealant causes bricks to absorb water like a sponge.

• Condensation buildup occurs when a system is improperly vented.

• A damaged or missing chimney cap leaves the flue open to rain and snow.

• A Cracked crown or chimney top allows water to seep inside the chimney.

• Deteriorated mortar joints create pathways for moisture.

• Improperly sealed or installed flashing allows water to seep in.

Often, it’s not just one issue--but a combination of issues--that leads to significant chimney damage.

Long-Term Effects of Ignoring Water Damage

Water damage gets worse over time, leading to:

• Structural instability of the chimney

• Interior home damage, including ceilings and walls

• Mold and mildew growth

• Reduced heating efficiency

• Expensive rebuilds or full chimney replacement

Unfortunately, what starts as a small chimney crack can quickly become a major repair project.

How to Protect Your Chimney From Water Damage

Although water can cause devastating damage to your chimney, you can take measures to prevent it by:

1. Installing a chimney cap

A chimney cap helps keep rain, snow, debris, and small critters out of your flue.

2. Applying a waterproof sealant

Professional-grade waterproofing allows masonry to “breathe” while repelling water.

3. Repairing or replacing the chimney crown

The crown is your chimney’s first line of defense. Keeping it sealed and crack-free is essential.

4. Maintaining the chimney flashing

Ensure the metal flashing around your chimney base is tight and properly sealed to prevent roof leaks.

5. Scheduling an annual inspection

Routine chimney inspections catch small issues before they become expensive problems.

What to do if You Already Have Water Damage on Your Chimney:

If your chimney is already showing signs of water damage, contact us as soon as possible to schedule any needed repairs.  

Repair solutions vary according to the type of damage and may include:

• Tuckpointing (repairing mortar joints)

• Crown repair or rebuild

• Chimney cap installation

• Waterproofing treatment

• Flashing repair

• Partial or full rebuild in severe cases

Note: Summer is the best time to address chimney masonry repairs in New Hampshire, because the warmer, drier conditions allow the mortar and/or sealant to cure properly.  

Chimney Water Proofing & Water Damage Repair in Southern NH & Northern MA

Water may be the most common cause of chimney damage, but it’s also the most preventable. Contact us today to discuss our chimney waterproofing and water damage repair services.

Closing Out the Burning Season: Key Fireplace and Chimney Considerations

While winter tends to linger in New England, we’re definitely approaching the end of the burning season. Now is the time to think about your chimney and fireplace’s maintenance and long-term care. Why? Because what you do after the season can have a big impact on your heating system’s safety, efficiency, and repair costs down the road. Here’s what you should be considering as spring approaches.

1. Schedule a chimney inspection.

With regular use, soot, creosote, and debris build up inside your chimney. After the burning season, scheduling a professional chimney inspection will help:

• Identify creosote buildup (a leading cause of chimney fires).

• Detects cracks or damage in the flue.

• Spot early signs of water intrusion or structural issues.

Spring inspections are ideal because you’ll have more scheduling flexibility and plenty of time to address any issues before next fall.

2. Schedule a chimney cleaning.

Even if you didn’t use your fireplace a lot this season, even small amounts of creosote buildup can become dangerous over time. Cleaning your chimney at the end of the season:

• Removes flammable residue.

• Prevents lingering smoky odors during humid months.

• Ensures your system is ready for next year.

Again, it’s much easier (and often more convenient) to schedule a chimney cleaning now, rather than scrambling in the fall when everyone else is booking appointments.

3. Check for moisture and water damage.

Melting winter snow, spring rain, and increased humidity can wreak havoc on your chimney. Water is one of the most damaging elements for masonry chimneys, leading to cracking, spalling, and deterioration. After the burn season ends, take a moment to look for:

• White staining (efflorescence) on the exterior brick

• Rust on the damper or firebox components

• Musty or damp odors coming from the fireplace

If you notice any of these signs, it’s worth having a professional assess the situation. Preventative waterproofing or minor repairs now can help you avoid costly work in the long run.

4. Inspect the chimney cap and crown.

Caps and crowns protect chimneys from water damage, animal invasions, and debris buildup. Winter weather can be especially harsh on these components, causing cracks or loosening. A quick inspection can help identify:

• Missing or damaged chimney caps

• Cracks in the crown that allow water in

• Blockages from leaves, animal nests, or debris

Addressing these issues in the off-season ensures your chimney stays protected year-round.

5. Close the damper (but keep airflow in mind).

Once you’re done using your fireplace for the season, ensure the damper is properly closed to prevent drafts and improve energy efficiency. Proper damper use can help:

• Reduce energy loss from your home

• Prevent humid air from entering the chimney system

• Keep pests from making their way inside

Note: Before closing your system for the season, ensure any residual moisture has dried out. 

6. Take care of any needed repairs.

A common mistake many homeowners make is waiting until the first cold snap to address any needed chimney concerns or repairs. By then, most chimney professionals are booked weeks out, and any minor issues may have become larger, costlier problems. Spring and summer are the best times to:

• Repair cracked flue liners

• Replace damaged components

• Repoint deteriorating mortar joints

Getting ahead of repairs ensures your fireplace is safe and ready when you need it most.

7. Think ahead to next season.

Take a moment to reflect on how your fireplace performed this winter. Did you notice smoke backing up into the room? Did you experience any unusual odors or have difficulty starting fires?  These are all clues that your system may need attention.

Addressing these issues now means you’ll be able to enjoy your fireplace with confidence in the next burning season.

Remember: A Little Attention Goes a Long Way

Your chimney and fireplace work hard all winter long. Giving them a little attention as the season winds down will extend your system's lifespan and keep your home and family safe. Contact our expert team today to schedule your inspection and cleaning.

Chimney Cleaning, Inspection & Repair in Southern NH & Northern MA

For over 20 years, our CCP-Certified Master Chimney Technicians have provided expert chimney cleaning, inspection, and repair services throughout Southern New Hampshire and Northern Massachusetts. Whether you’re wrapping up the season or getting ahead for next year, our team is here to help you protect your home and enjoy peace of mind year-round.