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
After
Before
AfterFast, Reliable Chimney Cap & Crown Across Islip
A chimney cap and crown in Islip typically costs between $340 and $1,650 depending on whether you need a simple cap replacement or a full crown rebuild with coating. Most jobs on this side of Great South Bay are completed the same day we arrive because we stock the parts Islip homes actually need: stainless and copper caps sized for clay tile flues, not the galvanized units that fail here in a few seasons. If you’re in Islip, East Islip, or down by the water in Oakdale, call (934) 935-3847 and Wendell or his crew will give you a straight price before anything comes off the truck.
The salt air does not ask permission. It just eats. We’ve seen galvanized caps on Islip capes and ranches rust through in three years while the same cap a dozen miles north in Smithtown is still doing fine. That is the reality of living on Great South Bay, and it changes what we recommend here. Not as an upsell. As math.
Why Top Hat Chimney Is Islip’s Preferred Chimney Cap & Crown Company
Top Hat Chimney has been owner-operated since 1999, and the person who shows up at your door in Islip is part of Wendell Pike’s crew, not a rotating subcontractor. That matters in a tight-knit town like Islip where you’ll run into us again at the Greenlawn Avenue bakery or the Islip Town beaches. We put our name and license number on every job, and the 90-Day Done Right Promise goes in writing. If the cap leaks or the crown coating fails inside that window, one call brings us back at no cost.
We answer the phone around the clock with a live person. Not a call center. Sometimes it’s Wendell himself picking up between jobs. When we schedule a visit to an Islip home, we give a real arrival window and call if it slips. The price you hear on the phone is the price on the invoice. No bait and switch at the door.
For Islip homeowners, local knowledge is not a talking point. It’s the difference between replacing a cap once a decade and replacing it every three years because nobody thought about salt air or the oil furnace behind it. We think about both.
Our Chimney Cap & Crown Services in Islip
Cap Installation
Cap installation in Islip means choosing metal that can handle coastal air. Standard galvanized starts pitting after the first nor’easter season. We install stainless steel and copper caps on Islip homes from the start, sized to the actual flue dimensions rather than a guess. For cape cods along Montauk Highway with original clay tile liners, that measurement matters. A loose-fitting cap in a storm is just a sail.
Cap Replacement
If your existing cap is rusted, loose, or gone entirely, we replace it with something that will stay. In East Islip and Bay Shore, we frequently pull off galvanized caps that looked fine from the ground but were corroded thin at the seams. We’ll show you the camera footage of what we found before recommending replacement. No scare tactics, just proof.
Crown Repair
The concrete crown at the top of your Islip chimney takes a beating from wind-driven rain off Great South Bay and the freeze-thaw cycle every Long Island winter. Small cracks widen. Salt-spalled mortar crumbles. For 1950s and 60s ranches in Islip Terrace and Brightwaters, we repair crowns by grinding out damaged material and rebuilding with a proper slope so water sheds away from the flue, not into it.
Crown Coating
Crown coating is a flexible sealant applied after the crown is repaired or when it is still intact but has hairline cracks. On Islip bayfront properties, we specify a breathable coating that can move with thermal expansion without cracking. This adds years to the crown and keeps water out of the flue tile and mortar joints below.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Stock for Islip Homes
We install and service caps and crowns from Chimney Cap & Crown manufacturers we have trusted for years: Copperfield, Olympia Chimney, and Famco. Because Islip homes need stainless and copper far more often than inland towns, we keep those sizes stocked and ready. No waiting two weeks for a special order while your exposed flue takes on nor’easter rain. Copperfield stainless caps and Olympia multi-flue systems cover most of the post-war capes and ranches here. If your neighbor’s furnace vents through the same stack, we account for that too.
Common Chimney Cap & Crown Problems We See in Islip Homes
- Salt-air corrosion: Galvanized caps and chase covers along the bayfront and near-bay hamlets of Oakdale and East Islip rust through in three to four years. The same cap lasts a decade in Smithtown. We spec stainless or copper here, always.
- Wind-driven rain through cracked crowns: Nor’easters funneling through Fire Island Inlet push rain horizontally into crown cracks. Once water saturates the flue tile and freezes, the mortar joints spall and open pathways between neighboring flues in shared stacks.
- Acidic oil-burner condensate: Most Islip chimneys serve oil furnaces, not wood stoves. Sulfurous condensate eats clay tile from the inside and corrodes cap bases, which loosen and blow off during storms.
- Galvanic corrosion at the cap-to-flue seam: When a galvanized cap sits on a stainless liner, dissimilar metals create electrolytic pitting right at the seam. Water seeps in where you cannot see it. This is surprisingly common in Islip homes with newer liners and older caps.
Pricing for Chimney Cap & Crown in Islip, NY
What changes the number here? Access. A steep roof on a 1950s ranch with a tall stack costs more in labor than a low-slope cape off Udalls Road. Salt damage that requires grinding out spalled mortar adds time. And the metal choice matters: copper is roughly double stainless but will outlast it on Bayfront properties. We give you the exact price before we start and we honor it. Call (934) 935-3847 for a free estimate anywhere in Islip.
We Also Serve Cities Near Islip
If you are in Islip or anywhere nearby, we cover the surrounding South Shore towns: East Islip, Brightwaters, Bay Shore, and Islip Terrace. Same crew, same upfront pricing, same 90-Day Done Right Promise. Wherever you are between Sunrise Highway and the bay, we’ll get your cap and crown handled. Call (934) 935-3847.
Serving Islip, NY - Our Local Coverage Area
We’re based in the Islip area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Chimney Cap & Crown in Islip
Our attached neighbor switched from oil to gas and their flue is now unused. Can we cap only our side of the shared stack in East Islip?
Yes, we can separate and cap only your flue on a shared stack. The key is a custom multi-flue cap with an internal divider that seals the unused flue while keeping yours properly vented. In East Islip, we do this regularly on attached capes where both flues exit through one masonry chase. We’ll scope the condition of the divider wall first because salt air and freeze-thaw often create openings between neighboring flues. If we find one, we seal it before capping so your neighbor’s unused flue does not become a path for exhaust or draft reversal. Call (934) 935-3847 for a specific quote.
Why do chimney caps rust so fast in Oakdale compared to towns just north?
Oakdale sits directly on Great South Bay, and the prevailing onshore winds carry salt aerosol onto metal surfaces year-round. Galvanized steel has a zinc coating that sacrifices itself to protect the steel underneath. In salt-heavy air, that zinc layer corrodes away in three to four years, leaving bare steel to rust through. Towns just north, like Smithtown, see far less salt and the same cap lasts eight to ten years. This is why we spec only stainless or copper caps in Oakdale and East Islip from the start. It’s not an upsell. It’s the only cap that makes sense here.
Our 1950s ranch has the original clay tile flue serving an oil furnace. The crown is cracked and the cap is missing. What is the minimum repair that will hold up?
The minimum that will actually hold up is a crown repair with flexible coating plus a correctly sized stainless cap. We would grind out the loose, salt-spalled mortar from the crown, rebuild it with a slope to shed water, and apply a breathable sealant that can flex without cracking. Then we’d measure the flue and install a stainless cap that stays put in a nor’easter. The cap is not optional here: an open flue in Islip takes horizontal rain off Great South Bay straight down into your clay tile. That one season of water entry will do more damage than any repair saves. Call (934) 935-3847 and we’ll give you an exact number before we touch anything.
Can a neighbor’s wood stove creosote migrate into our flue if we share a chimney?
Yes, if the wall of masonry separating the flues inside the shared stack has failed. Creosote is a sticky, vaporous byproduct of wood combustion, and it can condense and build up inside any passage it can find. In older Islip attached homes where one owner burns wood and the other runs an oil furnace, we’ve seen creosote from one flue showing up inside the other’s smoke chamber. This is exactly what happened on the East Islip cape where we installed a custom stainless Olympia cap and coated the crown. Right after we sealed the inter-flue passage, the draft reversal stopped and the neighbor’s firebox stopped smelling like oil exhaust. If you share a stack, have both flues scoped once. It’s cheaper than a chimney fire.
What is the best chimney cap material for a bayfront home in Islip?
The best material for a bayfront home in Islip is either 304 or 316 stainless steel, or solid copper. 316 stainless has extra molybdenum for saltwater environments and resists the pitting that 304 can develop after years of direct salt spray. Copper is the traditional choice for bayfront homes and heirloom-quality, but it costs roughly double stainless. Both outlast galvanized by decades. We use Copperfield stainless and copper caps and can have either made to size for your flue. The important part is the seam and the attachment: a good cap installed poorly will still fail. We bed and clamp marine-grade caps the way a roofer would flash a coastal skylight.
Contact Top Hat Chimney for Chimney Cap & Crown in Islip
If your cap is rusted, your crown is cracked, or a shared stack is causing problems between you and your neighbor, call us. We’ll answer the phone, ask about your setup, and give you an honest price. Wendell puts his name on the work and backs every job in writing with the 90-Day Done Right Promise. Seniors and veterans save 10%. Any repair over $200 gets $40 off. And if you’ve got another written estimate, bring it in and we’ll give you a free second opinion. Call (934) 935-3847 and we’ll get it done right.
*Written by Wendell Pike, Owner at Top Hat Chimney, serving Islip and the South Shore with chimney cap and crown work since 1999.*