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Get your free estimateMr-Glass Windows & Doors in San Francisco, CA | Lightwell Windows San Francisco
We provide independent Mr-Glass window and door service across San Francisco, from the Richmond to Noe Valley. The one thing that makes our Mr-Glass work different here is straightforward: we understand how the marine layer eats at wood sashes and steel hardware, and we plan every repair around that reality. If you have a Mr-Glass double hung, casement, bay, or garden window that’s fogged, sticking, or rotting, call (831) 480-4124 for a free estimate.
Why San Francisco Residents Choose Us for Mr-Glass Service
Most companies offering Window Replacement in San Francisco will happily sell you a new unit. Few will take the time to read an existing Mr-Glass frame the way Keith Yamada does before anything comes off the wall. Keith spent weekends as a kid weatherstripping his family’s 1960s ranch house in the San Gabriel Valley, and he still checks every corner twice. That habit matters here, where original Mr-Glass windows in Victorians and Edwardians often hide rot behind paint that looks fine from the street.
We are an independent Mr-Glass service provider, not a manufacturer affiliate or authorized dealer. That independence means we recommend the fix that fits your house and your budget, not the one that moves a factory’s inventory. We stock OEM Mr-Glass hardware and weatherstripping when it’s the right call, and we know exactly when to switch to marine-grade stainless or brass components that survive San Francisco’s salt fog better than the originals ever did.
Our Mr-Glass sales & service work is covered by the 365-Day Done Right Promise and the Cedarwell Care Promise, which has been our operating rule since 2010. That means shoe covers and drop cloths on every visit, a photo of the clean-up before the crew leaves, and a written price before any work starts. A live person answers our phone 24/7. When a foggy morning reveals a draft you didn’t notice in September, you’ll reach a human, not a voicemail tree.
Styles & brands we work with
Common Mr-Glass Windows & Doors Problems We Solve in San Francisco
- Fogged or failed insulated glass units. The persistent marine layer and temperature swings between 50-degree mornings and 70-degree afternoons put real stress on Mr-Glass sealed glazing. When the seal fails, condensation shows up between the panes and never leaves. We replace the IGU, not the whole window, whenever the sash is still sound.
- Seized or corroded steel casement cranks and hinges. In Sunset and Richmond homes, the original Mr-Glass steel operators rust in the salty air. The crank stops turning, or the sash won’t seat flush. We free or replace the hardware with stainless components that won’t repeat the failure.
- Wood rot at bottom rails and muntins. Fog-driven moisture gets into paint cracks, and San Francisco’s summer fog means wood never fully dries. We see lower rail rot on Mr-Glass double hungs all over the Avenues. The fix is careful epoxy consolidation or a new rail, matched to the original profile.
- Warped or swollen wood frames that prevent locking. When a Mr-Glass sash absorbs moisture for a decade, it swells. The lock stops lining up, and the air leak gets worse every foggy season. We plane, reset, and weatherstrip the frame so the lock actually engages again.
- Fog-line condensation and hidden sill rot. This is the one that surprises people. Windows that look dry on the surface can be rotting from inside the sill because moist, saline air works its way under paint. We probe the wood before we quote a repair, so you don’t pay for a cosmetic fix that fails in two years.
Mr-Glass Service in San Francisco: What Local Conditions Mean for Your Equipment
San Francisco’s Fog Line neighborhoods, the Richmond and the Sunset, sit in air so humid and saline that Mr-Glass wood windows with original single-pane glazing often develop interior condensation and hidden sill rot for no reason a homeowner can see. Two miles east in the Mission, the same window presents completely differently because the morning marine layer burns off earlier and the air carries far less salt. We treat Fog Line homes as their own repair category, adding ventilation strategies to the window service itself: checking crawlspace moisture contribution, adjusting interior humidity sources, and sealing the frame’s exterior face with high-solids paint or epoxy where the original factory coating is failing. There is no generic Mr-Glass repair manual for that set of conditions. There is ours, built from years of working the Avenues.
A specific example: on a 1910 Edwardian near 36th Avenue in the Richmond, our crew extracted a Mr-Glass Heritage casement with a rusted-shut crank operator and a rotted lower stile. We rebuilt the sash with marine-grade adhesive, installed a stainless crank assembly, and painted the exterior with high-solids epoxy that stands up to salt fog year after year. The window still looks period-appropriate from the sidewalk, but it’s not going to seize again next winter.
Mr-Glass Models & Products We Service in San Francisco
We work on the full Mr-Glass lineup that shows up in San Francisco homes: the Classic Double Hung, Heritage Casement, Bay & Bow Series, and Garden Window. Most of what we see in Victorian and Edwardian houses falls into those four families, and we know them well enough to source OEM Mr-Glass hardware and weatherstripping when it’s still in supply. When an original part is gone or was never good enough for this climate, we move to quality aftermarket brass or stainless components that hold up in salt air. We stock common weatherstripping profiles, crank operators, and glazing beads for fast turnaround across the city, so you’re not waiting on a factory shipment from across the country. Window Installation - San Francisco for full frame replacement, bay and bow window work, and ongoing maintenance are all part of the service we provide.
See the difference
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AfterMr-Glass Service Pricing in San Francisco
A good ballpark for Mr-Glass service in San Francisco: simple hardware repairs and weatherstripping typically run $180 to $450 per window. Full sash rebuilds and epoxy consolidation work usually fall between $500 and $950, depending on how much of the original wood has to come out. Full frame replacement on a Victorian or Edwardian is the high end of the spectrum, because period millwork and San Francisco seismic detailing add real cost. We give you a written price before any work starts, every time. That price covers the parts, the labor, and the clean-up, and we don’t hand you a different number at the end. Call (831) 480-4124 to schedule a free estimate, and we’ll come out and look at the actual frames before we talk numbers.
Serving San Francisco, CA - Our Local Coverage Area
We’re based in the San Francisco 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 – Mr-Glass Windows & Doors in San Francisco
Yes, in most cases. Original Mr-Glass steel casements in 1930s stucco houses are often mechanically sound under the rust. We free the hinges, replace the crank operator with stainless hardware, clean and re-lubricate the track, and reset the sash. Full replacement is only a recommendation when the steel itself is pitted through or the frame is no longer square. Call (831) 480-4124 if you’d like us to assess yours before you replace anything.
Yes. The standard felt or foam weatherstripping that Mr-Glass used on many double hungs breaks down faster in the Richmond, Sunset, and any neighborhood west of Twin Peaks where fog sits overnight. We switch to silicone or marine-grade bulb weatherstripping that resists moisture and salt absorption, which keeps the sash from swelling and the air seal from failing. This is a small material upgrade with a big effect on how the window behaves in January.
Almost certainly yes. Persistent condensation between the panes, not on the interior surface, means the Mr-Glass insulated glazing unit’s seal has failed and moisture is now trapped inside the assembly. In the Outer Sunset’s constant fog, that failure comes faster than in most of the country. We can replace the IGU in the existing Mr-Glass frame rather than tearing out the whole garden window, and that’s usually the smarter move. Call (831) 480-4124 and we’ll tell you what you’re looking at, free.
We match the original millwork profile using custom knives or stock profiles from the same period, and we build the new sash to the same dimensions and reveal as the original. For Victorian and Edwardian homes under San Francisco preservation rules, we also coordinate the material and finish choices with the reviewing body for your building. We have done this work throughout the city, and we know what will pass and what won’t before we start.
The wood absorbed moisture during the fog season and swelled, which compresses the sash against the jamb. Noe Valley sees more fog than people expect, especially in summer, and wood frames there do move. We plane the contacting surfaces, adjust the sash, and re-weatherstrip so the window opens cleanly. If you’ve been forcing it, you may have also strained a spring or cord, and we’ll inspect those as part of the repair. Call (831) 480-4124 for an exact quote, and we’ll come look before you strip a screw head.
Service Areas Near San Francisco
We serve the entire San Francisco service area, including the Richmond, the Sunset, Pacific Heights, Noe Valley, and the Mission. Lightwell also runs crews in the East Bay and nearby communities, including Mr-Glass service in Castro Valley and Mr-Glass service in Danville, plus Berkeley, San Leandro, and Walnut Creek. If you’re just outside city limits, call (831) 480-4124 and we’ll tell you if we can get to you this week.
Book Your Mr-Glass Service in San Francisco Today
If you’ve got a Mr-Glass window or door that’s fogging, sticking, or rotting in the marine air, Keith Yamada and the crew at Lightwell Windows San Francisco can help. Measure it until it’s boring, then cut once. Call (831) 480-4124 to schedule your free estimate, and you’ll get a written price before we touch a single screw.
Written by Keith Yamada, Owner at Lightwell Windows San Francisco, serving San Francisco since 2010.
Six Reasons Homeowners Choose Lightwell Windows San Francisco
Laminated glass and reinforced frames hold up to wind-driven rain, hail and flying debris, so your openings stay sealed when the weather turns.
Low-E insulated impact glass from our manufacturer lines commonly cuts monthly cooling bills 20-30%.
Laminated impact glass shuts out up to 40% of outside noise - traffic, neighbors, weather.
Monitoring services run $30-90 a month. Laminated impact glass resists forced entry around the clock, with no subscription.
Tighter seals and insulated glass even out hot and cold rooms and stop the drafts at the frame.
A full impact package upgrades curb appeal, buyer confidence and appraised value in one project.