Nassau · Suffolk · North & South Fork
Wood & Rotten Window Repair on Long Island
Free on-site estimate. Licensed and insured in Nassau and Suffolk, with offices in Manhasset and Hauppauge.
Wooden windows are one of the most beautiful and most demanding features in a Long Island home. When they're working correctly, they add character, insulation, and charm that no vinyl window can match. When they're not, they let in cold air, moisture, and noise, and they get worse fast if ignored.
We specialize in professional wood window and door repair across Long Island, NY, serving homeowners throughout Nassau County and Suffolk County. A swollen frame that won't open, a rotting sill or a broken sash: our technicians find the problem on site and fix it.
We've completed over 6,000 window and door repair projects across Long Island. We back every wood window repair with a 5-year warranty on workmanship and materials. Call 516-908-8005 or fill out the form on our website for a free on-site estimate, same-day appointments available.
4.9★648+ Google reviews
A+BBB accredited
LicensedNassau & Suffolk, fully insured
5 & 10 yrwarranties on wood and glass units
Where we do this work
All over Nassau and Suffolk, from our offices in Manhasset and Hauppauge out to the Hamptons and the North Fork.
Nassau County →
Garden City · Massapequa · Rockville Centre · Great Neck · Port Washington · Merrick
The East End →
The Hamptons, Sag Harbor, the North Fork, Greenport and Riverhead
4.9 stars from 648+ Google reviews
What homeowners say
Very professional team. I was quoted a fair price (was quoted lower than what i was told on the phone) and they repaired on the same day. Juriy came before the promised time and repaired the wood window. He cleaned the working site and the job was very well done. Would do business again.
Michael Bum Soo KwonThank you guys for restoring my arch wood window. I’ll definitely will do my next project with you.
oleksii hozhdaPrestige windows restored my old windows, making them look new. They are also very fairly priced. I had a great experience with them.
Shirley JosephWhat Our Wood Window Repair Service Covers
Wood windows develop problems in predictable ways. Long Island's humid summers, freezing winters, and salt air near the coast accelerate every one of them. Here is what our technicians repair every day:
Rotted Wood Frames and Sills
Wood rot is the most common issue we see on Long Island. It starts at the bottom corners of frames and sills where water collects, and it spreads fast once it starts. Soft, spongy, or discolored wood around your window frame is an early sign. We remove the damaged wood, treat the area, rebuild the profile using epoxy filler or Dutchman repair, and seal it against future moisture intrusion. In most cases, rotten window repair is completed in a single visit without replacing the entire frame.
Swollen or Warped Frames
Wood expands when it absorbs moisture. In Long Island summers, frames that were fine in March can be completely stuck by July. We plane and adjust swollen frames so your windows open and close smoothly again. We also identify and seal the moisture entry point so the problem doesn't return next season.
Broken or Damaged Sash
The sash is the part of the window that holds the glass and moves up and down (double-hung) or swings open (casement). Cracked, broken, or painted-shut sashes are one of the most common calls we get from homeowners in Nassau and Suffolk County. We repair or replace the sash while preserving your original window frame and glass where possible.
Deteriorated Glazing Compound
The putty that holds glass into wooden frames (called glazing compound) dries out, cracks, and falls away over time. When it does, cold air comes in around the glass, condensation forms, and the glass itself becomes loose. Our window reglazing service restores the seal between glass and frame, improving both energy efficiency and the appearance of the window.
Drafts and Air Leaks
If you can feel cold air coming through a closed window, the seals have failed. On wood windows this is typically caused by failed glazing compound, shrunken wood pulling away from the frame, or deteriorated weatherstripping. We locate every air pathway and seal it properly. Many customers tell us their heating bills drop noticeably after we complete this work.
Peeling or Failing Paint
Paint on wood windows is not cosmetic, it's the primary moisture barrier. When paint peels, bare wood is exposed to rain and humidity. We strip failing paint, treat any early-stage rot or moisture damage we find underneath, prime the wood properly, and repaint. This stops a cosmetic problem from becoming a structural one.
How to Tell If Your Window Has Wood Rot
You don't need to be a contractor to spot early rot. If you see two or more of these signs, call us or send the form.
- Soft or spongy wood. Press the wood around the frame corners and sill with a firm finger or a screwdriver handle. Healthy wood doesn't give. If it feels soft, compresses under light pressure, or your fingernail can dent it, rot is present.
- Discoloration. Dark brown, grey or black patches. Healthy exterior paint is uniform, so dark staining at the base of frames, across sills or at joints almost always means moisture has got in and fungus has started underneath.
- Paint that peels or bubbles. Bubbling on the outside of a window frame means moisture is coming from inside the wood and pushing the paint off. The wood beneath is wet and may already be rotting.
- Visible cracks along the grain. Rot often follows the grain and leaves a cracked, blocky pattern called "brown rot". If you see it anywhere on your frames, the wood fibers have already started to break down.
- Gaps opening up at frame joints. Rotting wood shrinks. Gaps at the corners where the vertical stiles meet the horizontal rails mean the wood has lost mass, and air and water are now getting inside.
- Drafts or condensation. These are late signs. Cold air through a closed wood window or constant condensation on the inside of the glass means moisture is deep in the frame. It needs attention now.
How we repair rot. We don't use fillers or cosmetic patches that hide rot without curing it. On every job we assess the window for free, remove all the compromised wood, apply a borate treatment, rebuild with epoxy or a Dutchman repair, prime, seal and paint, then find and fix the source of the moisture.
Hardware too. Locks, lifts, pulleys, balances and hinges all wear out on wood windows. We carry replacement hardware for all major brands; see our window mechanism repair service.
Should You Repair or Replace Your Wood Windows?
This is the question almost every Long Island homeowner asks us. The honest answer: repair is almost always the better choice for wood windows, especially in older homes. Here's why:
When replacement makes more sense. If more than 60% of the frame is structurally compromised by rot, if the sash cannot be salvaged, or if the window is a non-original replacement already, we'll tell you honestly. We have no interest in selling you repair work that won't hold.
- Cost: full window replacement typically costs way more than professional wood window repair (depending on the scope of work).
- Quality: older wood windows, particularly in pre-1980 Long Island homes, were made from old-growth timber that is denser, harder, and more rot-resistant than anything available today. Replacing them with modern windows often means trading down in quality.
- Historic homes, many homes in areas like Manhasset, Old Westbury, Garden City, and the Hamptons are in historic districts or carry deed restrictions that require preservation of original windows. Repair is often the only permitted option.
- Energy efficiency: properly maintained and resealed wood window with window recaulking and new weatherstripping can match the insulation performance of a modern double-pane replacement window.
When replacement makes more sense. If more than 60% of the frame is structurally compromised by rot, if the sash cannot be salvaged, or if the window is a non-original replacement already, we'll tell you honestly. We have no interest in selling you repair work that won't hold.
Wood Window Brands We Repair
We repair wood windows and wood-clad windows from all major manufacturers. Our technicians are familiar with the specific hardware, glazing methods, and joinery used by each brand:
Andersen windows, including the 400 Series, A-Series, and older wood units
Marvin windows, including Integrity and Ultimate wood windows
Pella windows: wood core and wood-clad units
Weather Shield windows
Lincoln windows
Kolbe windows
JELD-WEN windows
Peachtree, Visions, Guardian, and all other brands
Don't see your brand listed? Call us, if we haven't worked on it before, we'll tell you upfront.
Andersen windows, including the 400 Series, A-Series, and older wood units
Marvin windows, including Integrity and Ultimate wood windows
Pella windows: wood core and wood-clad units
Weather Shield windows
Lincoln windows
Kolbe windows
JELD-WEN windows
Peachtree, Visions, Guardian, and all other brands
Don't see your brand listed? Call us, if we haven't worked on it before, we'll tell you upfront.
Wood Window Repair Across Nassau and Suffolk County
We provide wood window repair throughout Long Island, NY, with our two service offices giving us fast response times across the entire island:
Our Manhasset office (1129 Northern Blvd, Suite 404B) serves all of Nassau County, including: Great Neck · Port Washington · Roslyn · Garden City · Hempstead · Levittown · Massapequa · Oyster Bay · Hicksville · Westbury
Our Hauppauge office (150 Motor Pkwy, Suite 401B) serves all of Suffolk County, including: Huntington · Smithtown · Commack · Bay Shore · Babylon · Patchogue · Riverhead · East Hampton · Stony Brook · Ronkonkoma
Don't see your town? We serve all of Long Island, call us at 516-908-8005 and we'll confirm coverage for your area.
Our Manhasset office (1129 Northern Blvd, Suite 404B) serves all of Nassau County, including: Great Neck · Port Washington · Roslyn · Garden City · Hempstead · Levittown · Massapequa · Oyster Bay · Hicksville · Westbury
Our Hauppauge office (150 Motor Pkwy, Suite 401B) serves all of Suffolk County, including: Huntington · Smithtown · Commack · Bay Shore · Babylon · Patchogue · Riverhead · East Hampton · Stony Brook · Ronkonkoma
Don't see your town? We serve all of Long Island, call us at 516-908-8005 and we'll confirm coverage for your area.
Get a Free Estimate for Door and Wood Window Repair in Long Island
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THE MOST POPULAR QUESTIONS
How much does wood window repair cost in Long Island?
The cost depends on what needs to be done. We provide free written estimates on-site before any work begins, so there are no surprises.
How long does wood window repair take?
Most repairs are completed in a single visit of 1–4 hours per window. Larger jobs (such as extensive rot repair on multiple windows) may require two visits, particularly if materials need to cure between steps. We'll give you an honest timeline at the estimate stage.
Can you repair windows in historic homes?
Yes. We have significant experience working on historic properties throughout Long Island, including homes in designated historic districts in Garden City, Oyster Bay, Sag Harbor, and the Hamptons. Our historic window restoration service is specifically designed for homes where original windows must be preserved.
My wood windows are original to the house. Is it worth repairing them?
Almost certainly yes. Original wood windows in Long Island homes built before 1970 were typically made from old-growth Douglas fir, white oak, or similar dense hardwoods. These species are no longer commercially available at the same quality. Repairing and maintaining original windows preserves both the character and the structural quality of your home.
Do you repair Andersen, Pella, and Marvin wood windows?
Yes, these are among the most common brands we work with. See our dedicated pages for Andersen window repair, Pella window repair, and Marvin window repair for brand-specific information.
Do you offer emergency wood window repair?
Yes. If a window has been broken, compromised by a storm, or poses a security risk, call us at 516-908-8005 and we'll prioritize your appointment.
Is it worth restoring old wood windows?
Usually. Older Long Island wood windows were built from old-growth timber that is denser and more rot-resistant than today's wood. Rebuilding them keeps the original look, can save up to 80% compared to full replacement, and carries our 5-year warranty.
Can window sashes be repaired?
Yes. We cut out rotted wood and splice in new, or build a new sash to fit your existing frame when the old one is too far gone. Then we reassemble, reglaze and paint it.
How much does it cost to repair a rotted window?
It depends on how much wood is affected. A sill or bottom-rail repair is at the lower end; rebuilding a full sash or frame costs more, but usually about 20% of a replacement window. We price it at the free estimate.
Can you stop wood rot once it starts?
Only by removing it. Rot keeps spreading under paint, so we cut out all the soft wood, rebuild with new wood, and seal and paint the repair so water can't get back in.
Can rotted wood actually be repaired, or does the window have to be replaced?
In most cases, yes, rotted wood can be fully repaired to structural integrity using epoxy consolidants and filler or Dutchman carpentry. The key is catching it before more than 60% of the structural frame is compromised. Even significant rot damage is repairable in the majority of cases we see across Nassau and Suffolk County.
How long does a rotten window repair last?
A properly executed rot repair, where damaged sections are replaced with newly manufactured sash parts and the repair is properly sealed and painted, can last 15–25 years or longer. Our repairs come with a 5-year warranty on workmanship. Properly replacing deteriorated wood and protecting the repaired area from moisture are key to a long-lasting repair.
Will the repaired area look different from the rest of the window?
No. When the job is complete, the repaired area is primed, sealed, and painted to match the surrounding surface. A properly finished timber repair is visually indistinguishable from the original wood.
How quickly does rot spread if I leave it?
Faster than most people expect. In Long Island's humid summers, active wood rot can double in size in a single season. A small soft spot at a sill corner in spring can be a structurally compromised 6-inch section by autumn. The longer you wait, the more expensive the repair, and at some point, repair is no longer an option. If you've noticed anything soft or discolored around your windows, book an inspection now.
Do you repair rotted door frames as well as windows?
Yes. Wood rot affects door frames through exactly the same mechanism as window frames. We repair rotted exterior door frames, sills, and surrounds in the same visit as window rot work. See our wood window and door repair service for full details on door-related work.