Antique double-hung window restoration

Based on your estimated location in Ashburn, Virginia, I found several companies serving Northern Virginia and the greater Washington, DC metro area that are worth contacting for antique double-hung window restoration.

For this particular project, I'd prioritize companies that specialize in preserving original wood sash windows, rather than ordinary window replacement contractors.

Top companies to consider

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1. Mozer Works

(Best specialist match)

Takoma Park, MD · 4.3/5 · 20 reviews

Specializes in historic wood window restoration, including double-hung sash windows, mechanical repairs, reglazing and storm-window solutions.

Why consider them: Particularly relevant to antique windows where retaining original materials and appearance matters.

Phone: 301-920-1900

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2. Renew Restoration, Inc.

(Best for full restoration)

Laurel, MD · 5.0/5 · 4 reviews

Specializes in restoring damaged wood windows and historic architectural features. Combines traditional craftsmanship with modern weatherstripping and restoration techniques.

Why consider them: A strong candidate for deteriorated antique sashes and frames.

Phone: 301-466-1406

Website and services

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3. Colonel Josh Services (The Sashman)

(Best for sash repair)

Washington, DC metro area

Specifically restores historic double-hung wood sash windows, including sash cords, balancing mechanisms, frame repairs and historic glass.

Why consider them: Their services closely match the mechanics and construction of antique double-hung windows.

Phone: 202-631-3376

Website

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4. VITMAR Restoration

DC, Maryland and Virginia · Established 2000

Specializes in historic carpentry, original double-hung sash restoration and replication of obsolete architectural woodwork.

Why consider them: Particularly good to investigate for historically significant homes and preservation-quality craftsmanship.

Phone: 301-789-8919

Website

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5. The Craftsmen Group Inc.

Brentwood, MD · 3.4/5 · 5 reviews

Offers historic wood window restoration and refurbishment, including traditional glazing, wood repairs and weatherstripping.

Why consider them: Their restoration methods are particularly relevant when original glass and wood components should be preserved.

Phone: 301-277-3700

Additional nearby option

Argo Window Repair & Glass Replacement

Ashburn, VA · 4.9/5 · 8 reviews

• Local option for sash, sill and frame repairs.
• Offers wood rot repair and glass replacement.
• Worth contacting for an initial assessment, although its antique-window preservation credentials are less established in the available information.

Phone: 571-601-4426.

Where these companies are located

What I would ask before hiring

For antique double-hung windows, I recommend asking each company:

1. Do you restore original wood sash windows rather than recommend replacement?
2. Can you repair or replace sash cords, pulleys and weights?
3. Can you preserve the original wavy glass?
4. Do you repair rotted sash rails, stiles and window frames?
5. Can you restore the original glazing putty and weatherstripping?
6. Are you EPA Lead-Safe Certified for work on older painted windows?

My first three calls would be Mozer Works, The Sashman and Renew Restoration. Their advertised services most closely match traditional double-hung window restoration.

One question to narrow down the best contractor

Are your antique windows:

• A. Original wood windows, probably 50–100+ years old, that you want completely restored.
• B. Wood windows that are basically sound but have broken sash cords, stuck sashes or deteriorated glazing.
• C. Severely deteriorated windows with wood rot, broken glass or damaged frames.

That distinction will help me narrow the list to the contractors best suited to your project, rather than companies that primarily replace windows.

For a Victorian-era home, the best window restoration services are those specializing in historic wood-window preservation rather than full window replacement.

The goal is to retain the original windows' craftsmanship, proportions, glass, hardware, and architectural details while improving weather resistance, energy efficiency, and operation.

I would prioritize specialists who understand historic preservation standards and have experience with 19th-century sash windows.

Best types of window restoration services

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1. Historic wood sash window restoration

(Best overall choice)

• Repair original sash, frames, rails, and muntins.
• Replace only rotten sections of wood.
• Restore pulleys, weights, cords, and locks.
• Preserve original wavy or antique glass.

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2. Traditional glazing and glass restoration

• Remove deteriorated glazing putty.
• Reglaze with appropriate traditional materials.
• Repair or retain original glass wherever possible.
• Preserve decorative and stained-glass panels.

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3. Historic window weatherization

• Install discreet weatherstripping.
• Repair air leaks and improve sash operation.
• Consider interior storm windows.
• Improve comfort without changing the exterior appearance.

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4. Decorative and stained-glass conservation

• Repair leaded glass and solder joints.
• Stabilize decorative panels.
• Restore original colors and patterns.
• Preserve original glass rather than substituting modern replicas.

These recommendations follow the National Park Service's preservation guidance, particularly its Preservation Brief 9: The Repair of Historic Wooden Windows.www.nps.gov+2

What to look for in a restoration company

The best contractor should:

• Have documented experience with Victorian and other historic homes.
• Offer in-place repairs instead of automatically recommending replacement.
• Understand traditional joinery, glazing, and old-growth wood.
• Be able to repair rather than discard original hardware.
• Provide photographs of previous restoration projects.
• Offer a written, itemized assessment of each window.

A warning: Be cautious of companies whose first recommendation is vinyl replacement windows or modern insulated units. These can substantially change the proportions and appearance of a Victorian façade.

My recommended approach

For the most authentic result, I'd hire a specialist who combines historic wood sash restoration, traditional glazing, and sensitive weatherization rather than hiring three separate general contractors.

Before approving work, ask for:

1. A window-by-window condition assessment.
2. A repair-first proposal.
3. A sample restored window before committing to the whole house.
4. An explanation of how original glass, hardware, and woodwork will be retained.

The National Park Service recommends repairing deteriorated historic features rather than replacing them whenever feasible.www.nps.gov+2

Finding the right specialists

Are you looking for restoration companies near Chambersburg, Pennsylvania, or are you interested in the best historic-window restoration companies anywhere in the United States? I can narrow it down to specialists with proven Victorian-home experience.

If your home is in the Newburgh or Hudson Valley area, I'd start with a historic window restoration specialist rather than a standard replacement-window company.

You can often make original wood windows substantially more energy efficient without losing their original glass, wood profiles, divided-light patterns, or historic character.

Here are some promising specialists and resources.

Historic window restoration specialists

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1. Newburgh Sash & Restoration

(My first recommendation)

• Based in Newburgh.
• Builds and restores traditional wood windows.
• Serves the Hudson Valley.
• Particularly relevant for preserving original wooden sash windows.

Website: urlNewburgh Sash & Restorationturn342829search0

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2. Balanced Builders Inc.

• Newburgh-based restoration contractor.
• Offers historic restoration and traditional construction.
• Worth contacting for a broader assessment of historic windows and the surrounding building.

Website: urlBalanced Buildersturn342829search1 Phone: 845-551-9953

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3. H.P. Steel Window Restoration & Repair

• Wappingers Falls, NY.
• Specializes in vintage steel windows and doors.
• Suitable if your home has original metal casement windows.

Phone: 845-288-3882

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4. Richardson Window Works

• Historic window restoration and reproduction.
• Offers weatherization and storm windows.
• Specifically addresses energy efficiency while preserving historic appearance.

Phone: 607-282-4386

Website: urlRichardson Window Worksturn342829search4

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5. Right Path Windows & Doors

• Historic wood, steel, and aluminum window restoration.
• Offers weatherstripping, Low-E glass and insulated-glass upgrades.
• Also fabricates historically accurate replacements when necessary.

Website: urlRestoration Servicesturn342829search5

What restoration work should you ask for?

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I recommend asking contractors about these improvements:

Importantly, the New York State Historic Preservation Office recommends considering window repair and weatherization before wholesale replacement.parks.ny.gov+1

Find the right preservation professional

A few questions to narrow this down

I'd like to help you find the best person for your particular house.

1. What kind of original windows do you have?

• Traditional double-hung wood windows (two sliding sections)
• Casement windows (hinged on the side)
• Leaded or stained glass windows
• Not sure

2. Approximately how old is your home?

• Before 1900
• 1900–1940
• 1940–1960
• After 1960

3. What is your main goal?

• Eliminate drafts and cold air.
• Improve insulation and reduce heating bills.
• Restore damaged or deteriorating wood windows.
• Do all three while preserving the original appearance.

With those details, I can narrow the list to the most appropriate restoration specialists and help you avoid contractors who will simply recommend replacing all your historic windows.

I can help you find contractors who specialize in historic wood window sash restoration and glass preservation—not companies that simply replace old windows with modern units.

The key services to look for are:

• Repairing and rebuilding original wood sash frames.
• Preserving and reinstalling existing glass, including wavy or antique glass.
• Repairing sash cords, weights, pulleys, and hardware.
• Replacing deteriorated wood while retaining the original window profiles.
• Restoring weatherstripping and improving operation without sacrificing historic character.

Recommended contractors in the Los Angeles area

I found several promising candidates. These are the ones I'd contact first.

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1. Window Restoration and Repair

(Best first call)

Los Alamitos · Serves Los Angeles County

562-493-1590

• Traditional wood and steel window restoration.
• Sash cord and hardware repairs.
• Sash refitting, wood repairs and weatherstripping.
• Specifically works on historic buildings.

Website:windowrestorationandrepair.com

Strongest match for your project. Ask them to confirm they can retain and reinstall every original glass pane.

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2. Arroyo Historical Restoration and Construction

Los Angeles · Historic preservation contractor

626-989-1285

• Historic wood window sash repair.
• Traditional carpentry and wood restoration.
• Weatherproofing and repair of original window components.

Worth contacting for preservation-oriented repairs rather than wholesale replacement.

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3. KC Restoration Co, Inc

Gardena / Culver City · Historic restoration

310-280-0597

• Wood and metal window restoration.
• Historic architectural conservation.
• Preservation of original architectural materials.

Website:kcrestorationinc.com

Especially worth considering for historically significant properties.

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4. American Window Restoration

Long Beach · Greater Los Angeles and Orange County

562-276-3786

• Historic and vintage wood window restoration.
• Sash rope, weight and hardware repairs.
• Wood repairs and glazing work.

Ask specifically about preserving original antique glass during sash repairs.

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5. JC Window Restoration

Long Beach

562-704-5979

• Historic and vintage wood window restoration.
• Double-hung sash repairs.
• Traditional window repair and restoration.

Confirm original-glass retention before arranging an estimate.

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6. Restoration Sash and Door

Harbor City · South Bay

310-326-8940

• Custom wood sash and window fabrication.
• Traditional woodworking and historic profile matching.
• Useful for damaged or deteriorated sash components.

Ask whether they can repair your existing sash rather than fabricate replacements.

Additional preservation resources

Two particularly useful resources for finding specialists:

• Pasadena Heritage contractor referral list — includes window repair specialists.
• Historic Preservation contractor directory — dedicated historic window restoration listings.

Important: What to tell contractors

I would send this message before scheduling estimates:

:::writing{variant="email" id="62841" subject="Historic Window Sash Restoration – Original Glass Must Be Preserved"}

Hello,

I'm looking for an experienced historic window restoration contractor to repair original wood window sashes.

An important requirement is that the existing original glass must be preserved. I do not want the original glass removed and discarded or replaced with modern glass.

The work may include:

• Repairing deteriorated wood sash components.
• Repairing sash joints and glazing putty.
• Replacing sash cords and repairing weights and pulleys.
• Retaining and carefully reinstalling all original glass.
• Restoring the windows to proper working condition.

Do you have experience removing, repairing, and reglazing historic wood sashes while preserving the original glass?

I'd also appreciate seeing photographs of similar completed projects and receiving an estimate.

Thank you.

:::

A couple of questions to narrow the list

1. Where is the property? Los Angeles, Pasadena, Long Beach, or another area?

2. What kind of windows do you have?

• Double-hung wood windows (upper and lower sash slide vertically).
• Casement windows (hinged at the side).
• Steel-framed historic windows.
• Something else.

3. Is the glass original wavy or antique glass? Or is it ordinary old window glass?

That last distinction matters. Some contractors can repair wood sash but don't have the experience necessary to safely handle fragile antique glass.

I can narrow this down to the best three to five specialists who are most likely to preserve the original glass rather than recommend replacement.