Level 1 sweep and inspection to the NFPA 211 annual standard - flue, crown, cap, and flashing checked and photographed
Chimney sweep logs do not sweep chimneys. They loosen some creosote - which then falls where a brush and vacuum still have to collect it.
Before
After
Before
AfterMortar Repointing in Plainview, NY
Mortar repointing is the process of removing deteriorated mortar from the joints between your chimney’s masonry units and packing in fresh, properly mixed mortar to restore a weathertight bond. In Plainview, where freeze-thaw cycles hit the same chimney face repeatedly from November through March, those joints can lose a quarter-inch or more of depth in a single winter. Catch it early and a repointing job protects the masonry for another 20 to 30 years. Ignore it and water works its way behind the bricks, and a straightforward repair turns into our Chimney Repair services for a partial or full chimney rebuild.
At Hearthstone Chimney Co., we’ve been doing this work since 1984 – over 42 years of reading mortar joints on Long Island chimneys. Russell Haines leads the crew, and every job starts with a Level-2 camera inspection so we’re not guessing about what’s happening above the roofline. If you’d like a free estimate, call us at (934) 348-4832 – a live person answers every call, every day of the week. This page covers everything specific to mortar repointing in Plainview: what the warning signs look like, exactly how we do the work, what it costs in this market, and the most common questions we get from homeowners in communities like Bethpage, Syosset, and Old Bethpage. If you want the broader picture first, our Chimney Repair in Plainview page lays out the full scope of masonry repair services we offer here.
When You Need Mortar Repointing
The signs aren’t always obvious from the ground, but there are things a homeowner can notice – including Spalling Brick Repair warning signs – and things our camera inspection confirms. Here’s what we look for, and what you should watch for in Plainview specifically.
- Mortar joints recessed more than 1/4 inch. Run your finger along the joints between the bricks. If your fingertip sinks deeper than a quarter-inch, the joint has weathered back far enough to let rainwater pool. Plainview averages about 47 inches of rain a year, and that water has to go somewhere.
- Crumbling or sandy mortar that comes away with light pressure. Original 1960s and 1970s mortar – common on the split-levels and colonials throughout Plainview’s older neighborhoods – used softer lime-based mixes that age out. When the mortar powders instead of chips, it’s well past the point of spot-patching.
- White staining (efflorescence) on the chimney face. That chalky white residue is dissolved salts being pushed outward by water moving through the masonry. It tells us water is already inside the joints, not just sitting on the surface.
- Spalling bricks on the chimney stack. Once the joints open up, water gets behind the face of the brick itself. When it freezes, it expands and pops the face off the brick. Spalling almost always traces back to failed mortar joints that should have been repointed a few years earlier.
- Staining or dampness on the firebox walls or the ceiling around the chase. Interior water staining after a rain is a late-stage symptom. By the time moisture is showing up inside, the joint damage is significant. We see this regularly in Plainview homes after a northeast storm comes through in February or March.
- A chimney that hasn’t been inspected in more than 10 years. Mortar doesn’t announce when it fails. If your chimney is on a house built between 1955 and 1985 – which covers a large portion of Plainview’s housing stock – and it hasn’t had a professional look since the last owner, it almost certainly needs at least some repointing.
Our Mortar Repointing Process
We do this work in a specific sequence because sequence matters. Packing new mortar over loose old mortar is a common shortcut that fails inside of two winters. We don’t do it that way.
- Level-2 inspection and documentation. Before any mortar gets touched, we run a camera inspection of the full chimney system – flue liner, firebox, smoke chamber, and exterior masonry. We photograph every section of joint failure and give you a plain-English summary of what we found. You see the same images we see. This step exists so we’re repointing exactly what needs repointing, not guessing from the ground, and not missing a cracked liner behind the wall that would make the repointing secondary to a more serious problem.
- Cutting out the failed mortar. We use an angle grinder with a mortar-raking blade to remove old mortar to a depth of at least 3/4 inch – typically 1 to 1.25 inches on older Plainview chimneys where the original mortar has failed uniformly. Cold chisel and hammer work follows in any area where power tools risk damaging the surrounding brick. The joint has to be clean, dry, and at the right depth before anything new goes in.
- Selecting the correct mortar mix. This step is where a lot of discount operators cut corners. Mortar hardness has to be matched to the age and type of the masonry. Putting a high-Portland, Type S mortar on a pre-1970 brick chimney built with softer lime mortar causes the brick itself to crack because the new mortar is harder than the surrounding unit. We match the mix to the brick – typically a Type N or custom lime blend on older masonry, Type S on newer concrete block construction. We source mortar materials through professional-grade suppliers including Olympia Chimney products where applicable, and we mix on-site to the right specification for your chimney.
- Packing and tooling the new joints. We work in lifts when joints are deep, allowing each layer to reach initial set before the next goes in. Once the joint is packed flush, we tool it to a concave or slightly raked profile to shed water away from the face of the brick. Flat-troweled joints hold water against the brick face – a small detail that adds years of service life.
- Cleaning the chimney face and checking the work. We clean mortar smear off the brick face before it fully cures, which is the only time it comes off cleanly without acid washing. Then we do a joint-by-joint visual and tactile check of every repaired section before we come down off the roof.
- Final documentation and closeout. We photograph the completed work, walk you through what was done, and give you the written 90-Day Done Right Promise before we load the truck. If anything we repointed fails within 90 days, we come back and make it right. No paperwork, no arguing – that’s what the promise means in practice.
Mortar Repointing Pricing in Plainview
Mortar repointing in Plainview typically runs between $400 and $2,200 for a standard residential chimney, depending on the factors below – see How Much Does Chimney Repair Cost? (2026 Price Guide) - Plainview, NY for full pricing details. That range is specific to this market – costs differ in Manhattan or the North Fork because labor and material delivery cost differently there.
| Scope of Work | Typical Price Range (Plainview, NY) |
|---|---|
| Spot repointing (1-2 linear feet, accessible section) | $400 – $650 |
| Single-face repointing (full chimney above roofline, one side) | $650 – $1,100 |
| Full chimney repointing (all four faces, above roofline) | $1,100 – $2,200 |
| Extended stack repointing (tall chimney, two-story roofline or higher) | $1,500 – $2,800+ |
Several things move that number up or down on any given job:
- Height and roof pitch. A chimney on a steep-pitched colonial in Plainview Farms takes more rigging time to access safely than the same chimney on a ranch. Roof pitch directly affects labor hours.
- Depth and extent of the joint failure. A chimney where the original mortar is failing uniformly requires more cut-out time than one with isolated joint failure in a small section. Our inspection tells us this before we write the estimate.
- Mortar type required. Custom lime-blend mixes cost more than standard Type S bagged mortar. Older Plainview homes built in the 1950s and 1960s frequently require a softer mix to protect the original brick.
- Simultaneous repairs. If the crown is cracked or a cap needs replacement at the same time, we can address both during the same mobilization, which is more cost-effective than two separate service calls.
Our estimates are always free, and the number on the estimate is the number on the invoice. No surprises on the bill – that’s a straight commitment, not a slogan. If your repair total exceeds $250, our current $50 Off Any Repair Over $250 offer applies automatically. We also extend a permanent 5% discount to seniors and veterans, which applies to a large portion of the homeowners we work with in Plainview. Call (934) 348-4832 to schedule a free estimate.
FAQs – Mortar Repointing
How much does mortar repointing cost in Plainview, NY?
Mortar repointing in Plainview runs roughly $400 to $2,200 for a standard residential chimney, with full four-face repointing on a taller stack sometimes reaching $2,800. The main variables are the height and pitch of your roof, how deeply the old mortar has failed, and whether a custom mortar mix is needed to match your brick. We give free on-site estimates, so you’ll have an exact number before any work begins. Call (934) 348-4832 to schedule yours.
Can I repoint chimney mortar myself?
The short answer is: the mixing and application are learnable, but two things stop most homeowners from doing it well. First, working safely at roofline height on a pitched roof requires staging and fall protection that most homeowners don’t own. Chimney work is among the most common sources of DIY fall injuries, and we’d rather give you an honest estimate than see someone get hurt on a Nassau County roof. Second, matching the mortar hardness to your existing brick is a technical judgment call – use a mix that’s too hard and you can crack original brick that isn’t replaceable. If the joint failure is limited to accessible areas at the base of the chimney, minor spot work with a pre-mixed mortar may be fine. Anything above the roofline, we’d recommend calling a professional.
How long does repointing mortar last?
Properly mixed and installed repointing mortar on a Plainview chimney lasts 20 to 30 years under normal conditions – meaning the chimney has a sound cap, no overhanging trees dropping debris into the flue, and no unusual water intrusion from a failed crown or flashing. The joints we repoint are backed by our 90-Day Done Right Promise in writing, and in practice, work done to the right specification rarely calls us back early. What shortens mortar life prematurely is an underlying water source that wasn’t identified – which is why the Level-2 inspection before repointing matters.
Is repointing enough, or does my chimney need a full rebuild?
Repointing is the right repair when the mortar has failed but the bricks themselves are structurally sound – no significant spalling, no leaning, and no sections where the masonry has separated or shifted. Once spalling is widespread, bricks are cracked through (not just surface-chipped), or the stack has visible lean, a partial or full rebuild becomes necessary. Our Level-2 inspection tells us which situation you’re actually in, with photos to back it up, so you’re not taking our word for it. Most Plainview chimneys we assess end up needing repointing rather than rebuilding – but we’ll tell you plainly if that’s not the case. For a complete look at repair options, visit our home page or call us at (934) 348-4832.
Why Plainview Homeowners Call Hearthstone
Plainview’s housing stock runs heavily toward colonials and split-levels built between 1955 and 1975. Those chimneys are now 50 to 70 years old, which means the original mortar is at or past the end of its service life regardless of how the house has been maintained. We see this pattern in Woodbury Heights, Central Park Estates, and the neighborhoods closer to Old Country Road – same era of construction, same mortar failure timeline.
What we bring to those jobs is 42 years of working with Long Island masonry specifically. We know the freeze-thaw pattern here. We know what the original 1960s mortar mixes looked like and how to match the replacement to the existing brick. We use professional-grade materials from trusted manufacturers including Gelco and Olympia Chimney products, not builder-grade bagged mortar from a big-box store. And we back everything with the 90-Day Done Right Promise in writing – if the repointing we did isn’t holding up, we come back and make it right. That’s not a conditional offer and it doesn’t require a phone argument to enforce.
Russell Haines has led this company through four decades of that kind of work. The technicians who come to your home are background-checked, uniformed, and in most cases will complete the job in a single visit. The estimate is free, and the price on the estimate is the price you pay.
If you’ve noticed crumbling mortar joints, white staining on your chimney face, or you simply haven’t had the chimney inspected in years, the right first step is a call – not a commitment to anything. Our full Chimney Repair in Plainview services page covers the complete range of masonry work we do if you want a broader picture before calling.
Schedule a Free Mortar Repointing Estimate in Plainview
A deteriorating mortar joint doesn’t improve on its own. The repair is straightforward when it’s caught early; it becomes a significantly more involved project when water has had years to work behind the brick. If you’re in Plainview or the surrounding communities, call (934) 348-4832 for a free estimate. A live person answers that number every day, around the clock. We’ll schedule a time that works for you, inspect the chimney thoroughly, photograph what we find, and give you a plain-English assessment with a no-surprise price before any work begins.
Done right – and we stand behind it.
Written by Russell Haines, Owner at Hearthstone Chimney Co., serving Plainview since 1984.