Chimney Services » North Brookfield, MA – Chimney Extension, Crown Build and Cap Install

Chimney Extension, Crown Build & Cap Install in North Brookfield, MA

There are certain chimney issues that are easy to spot – visible cracks, crumbling mortar, or a chimney cap that’s clearly seen better days. But one of the most commonly overlooked chimney problems is one that isn’t always obvious to the untrained eye: a chimney that simply isn’t tall enough to meet current building code requirements. For a homeowner in North Brookfield, MA, that was exactly the situation they were facing – and it was one that carried real consequences for both safety and performance.

The homeowner reached out to Chim Chimney Sweeps, and our vetted service technician and mason, Jason, was on the job. Armed with the right tools, materials, and safety equipment, Jason tackled a comprehensive scope of work that left this chimney structurally sound, code compliant, waterproofed, and fully protected from the elements and wildlife from top to bottom.

AFTER

The Problem: A Chimney Below Code Height

Chimney height requirements aren’t arbitrary – they exist for good reason, and they have a direct impact on how safely and effectively a chimney performs. The standard rule, often referred to as the “2-10 Rule,” requires that a chimney extend at least 2 feet above any part of the roof within 10 feet of it. This standard exists to ensure:

• Proper draft. A chimney that is too short can struggle to draw combustion gases upward effectively, resulting in smoke backing up into the home
• Fire safety. Sparks and embers exiting a chimney that sits too close to the roofline can pose a fire risk to the roof structure and surrounding materials
• Code compliance. A chimney below the required height can create issues with home inspections, insurance coverage, and real estate transactions
• Appliance performance. Many heating appliances require a minimum chimney height to operate at peak efficiency and within manufacturer specifications

In North Brookfield, this homeowner’s chimney had fallen short of the required height – and addressing it meant not just adding a few courses of brick, but doing so correctly, with attention to every detail of the surrounding masonry as well.

Meet Jason: Vetted, Skilled, and Ready to Work

Not every chimney company sends a qualified mason to handle masonry work. At Chim Chimney Sweeps, we take pride in having vetted, skilled technicians who bring real expertise to every job. Jason is one of our trusted service technicians and masons – the kind of professional who shows up fully prepared, properly equipped with safety gear for working at height, and committed to doing the job right the first time.

For this North Brookfield homeowner, Jason was the right person for the job. He arrived, assessed the full scope of work needed, and got to work on a top-to-bottom chimney improvement that went well beyond simply adding a few bricks to the top.

The Work: A Comprehensive Top-to-Bottom Chimney Improvement

What began as a chimney extension quickly became a full-service masonry project, addressing not just the height issue but every aspect of the chimney’s condition and long-term protection. Here is a detailed look at everything Jason tackled on this job.

1. Chimney Extension: Building Up to Code Height

The foundation of this project was extending the chimney by laying in new courses of brickwork to bring it up to the required code height. This is precision masonry work – each new course of brick must be carefully laid with properly mixed mortar, keeping the structure plumb, level, and properly aligned with the existing chimney below.

Jason worked methodically from the existing chimney top upward, adding the necessary courses of quality brick to reach the correct height. The new brickwork was matched as closely as possible to the existing masonry in terms of brick size and mortar joint style, ensuring a cohesive finished appearance that looked intentional rather than patched.

Getting this step right matters beyond just aesthetics. Poorly laid brickwork at the top of a chimney, where it is most exposed to weather and temperature fluctuations – will deteriorate quickly, leading to the same problems all over again in just a few years. Jason’s craftsmanship ensured this extension was built to last.

2. Tuckpointing the Existing Mortar Joints

While building the chimney extension, Jason also turned his attention to the existing brickwork below – and what he found were mortar joints that had been worn down by years of exposure to New England’s freeze-thaw cycles and moisture.

Tuckpointing is the process of carefully removing deteriorated mortar from the joints between bricks and replacing it with fresh, properly mixed mortar. It is one of the most important maintenance procedures for any masonry chimney, and one that is often neglected until the damage becomes severe.

Here’s why tuckpointing matters:

• Structural integrity. Mortar is what holds the brickwork together. Deteriorated mortar weakens the entire structure and allows bricks to shift or loosen
• Water resistance. Intact mortar joints are the first line of defense against water infiltration. Cracked or eroded joints allow moisture to penetrate deep into the masonry, where freeze-thaw cycling causes accelerating damage
• Cost efficiency. Tuckpointing a chimney is significantly less expensive than allowing mortar deterioration to progress to the point where a partial or full rebuild becomes necessary

By tuckpointing the existing joints alongside the new extension work, Jason ensured that the entire chimney (old and new) was structurally sound from the roofline up.

3. Building a New Concrete Crown

At the very top of the chimney, Jason constructed a brand new concrete crown. The chimney crown is one of the most important – and most frequently damaged – components of any chimney system.

The crown serves several critical functions:

• It protects the masonry by covering the top of the chimney structure and directing water away from the flue opening and brickwork
• It holds the chimney together by encasing the top courses of brickwork in a solid, unified concrete slab
• It sheds water away from the chimney rather than allowing it to pool on top of the bricks and mortar

A properly built chimney crown should be formed with a slight outward slope to promote drainage, and it should overhang the outer edge of the chimney slightly to direct water away from the masonry below. Jason built this crown to those specifications, creating a durable, well-formed cap of concrete that will protect the top of the chimney for years to come.

4. Waterproofing the Exterior Brickwork

Once the new brickwork was laid, the tuckpointing was complete, and the crown was built and cured, Jason applied a professional-grade waterproofing treatment to the full exterior of the chimney.

This step is often skipped by less thorough contractors, and it’s one that makes a significant difference in the long-term lifespan of the masonry. Brick is a porous material. Even structurally sound, well-pointed brickwork will absorb moisture over time. In New England’s climate, where temperatures regularly swing above and below freezing throughout the winter months, that absorbed moisture freezes and expands inside the brick, causing it to crack and spall from the inside out.

A penetrating waterproofing sealer solves this problem by:

• Repelling water from the surface of the brick while still allowing the masonry to breathe and release moisture vapor from within
• Protecting against freeze-thaw damage that causes brick spalling and mortar erosion
• Extending the life of the masonry significantly, reducing the frequency of future repairs
• Preserving the tuckpointing work already completed, keeping fresh mortar joints in good condition for as long as possible

Waterproofing a chimney after masonry work is one of the smartest investments a homeowner can make – it protects everything that was just repaired and ensures those repairs last as long as possible.

5. New Chimney Cap Installation

The finishing touch on this comprehensive project was the installation of a brand new chimney cap. After all the work done below it – the extension, the tuckpointing, the new crown, the waterproofing – the last thing anyone wanted was to leave the flue open and unprotected.

A chimney cap sits over the flue opening at the top of the crown, serving as the primary barrier between the interior of the chimney and everything outside it. A quality cap keeps out:

• Rain and snow that cause moisture damage to the liner and masonry
• Wildlife including raccoons, squirrels, and birds seeking a nesting site
• Debris such as leaves and twigs that accumulate and block airflow or create fire hazards
• Wind-driven downdrafts that can push smoke and combustion gases back into the home

With a properly fitted, durable chimney cap now in place, this North Brookfield chimney is fully sealed and protected – and the homeowner can be confident that the investment made in the masonry work below will be preserved for the long term.

The Completed Project: Everything This Chimney Needed

When Jason packed up and left this North Brookfield property, the homeowner had a chimney that was fundamentally transformed from what it had been at the start of the day. Every component – from the brickwork up through the crown to the cap – had been addressed with care and craftsmanship.

The full scope of completed work included:

✔ New courses of brickwork laid to bring the chimney up to code height
✔ Full tuckpointing of existing mortar joints throughout the chimney
✔ New concrete crown built and formed to proper drainage specifications
✔ Professional waterproofing applied to the full exterior masonry
✔ New chimney cap installed to protect against weather, wildlife, and debris
✔ All work completed safely with proper equipment for working at height

Why Address Chimney Height & Masonry Issues Sooner Rather Than Later?

Chimney problems – whether it’s a height issue, deteriorating mortar, a cracked crown, or a missing cap – rarely stay the same. They get worse. Water infiltration accelerates mortar erosion. Mortar erosion allows more water in. Freeze-thaw cycles expand minor cracks into major ones. What starts as a tuckpointing job becomes a rebuild if left unattended long enough.

Addressing chimney issues proactively is almost always significantly less expensive than waiting until the damage compounds. It also ensures that the chimney is safe to use, code compliant, and not quietly causing damage to the surrounding structure of the home.

Is Your Chimney Up to Code? Let Us Take a Look.

If you’re not sure whether your chimney meets current height requirements, or if it’s been a while since anyone has taken a close look at the condition of your mortar joints, crown, or cap, Chim Chimney Sweeps is here to help. Our experienced technicians and masons serve homeowners throughout Massachusetts with honest assessments and quality workmanship on every job.

Contact us today to schedule your chimney inspection or masonry service.

Proudly serving North Brookfield, MA and surrounding communities throughout Massachusetts.