VLX 500 Sliding Window

VLX 500 Sliding Window in San Francisco, CA | Lightwell Windows San Francisco

The VLX 500 is a high-performance aluminum sliding window with a deliberately slim 1.97-inch profile and an effortless horizontal glide. It’s the product San Francisco architects and homeowners reach for when they want the largest possible glass opening without the maintenance burden of wood or the bulk of vinyl. Available in both 2-track and 3-track configurations, the VLX 500 suits openings from compact remodel replacements to full panoramic wall assemblies in Marina, Noe Valley, and Potrero Hill homes.

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As an authorized ViewLux installation partner, Lightwell Windows San Francisco brings something a mail-order supplier can’t: local measurement, local permits when required, and installation performed to AAMA standards that keeps the manufacturer warranty intact. Call (831) 480-4124 to schedule a free on-site measurement for your San Francisco project.

Product Overview – VLX 500 Sliding Window

The VLX 500 is ViewLux’s answer to a problem that’s everywhere in San Francisco real estate: buildings where every inch of glass matters, and window openings that get asked to do too much. Older sliding windows in this city bind, rattle, leak fog into the gap, and fight you every time you open them. The VLX 500 is designed so that none of those things happen.

The frame is extruded aluminum with a wall thickness of 0.079 inches. That’s thicker than what you’ll find in most residential aluminum windows sold through big-box channels. The added mass translates into a straighter frame over decades of temperature swings and bay-area humidity. The 1.97-inch profile width means the frame reads as a thin line around the glass, which is precisely what modern homes and mid-century renovations in the Richmond and Sunset districts need.

What owners notice first is the glide. The track and roller system on the 2-track and 3-track configurations is engineered so a panel loaded with double-pane glass still opens with a single hand. That’s a detail you appreciate every single day in a San Francisco home, where opening the window is often how you control temperature and indoor air. The 3-track option also gives you a wider opening percentage, which matters in rooms that face a view corridor and want the maximum unobstructed pass-through.

This is a sliding window for people who want minimal interruption to sightlines, durable operation, and clean architectural lines. It fits San Francisco’s mix of Victorian remodels, contemporary box homes, and everything in between because the hardware disappears into the frame and the finish options respond to both traditional and modern palettes. Lightwell Windows San Francisco sells and installs this window specifically because it holds its adjustment over time, seals tightly, and stands up to the specific conditions our city throws at windows.

Technical Specifications

Here is the VLX 500 in plain numbers and descriptions. We list the specifications as we install them for San Francisco clients, not as a copy-paste from a catalog table.

Not every option above is right for every San Francisco building. Coastal exposure in the Outer Sunset and the wind patterns on Twin Peaks or Diamond Heights change which glass and which track configuration we’d recommend. During your on-site measurement, we walk through the choices with the actual conditions of your house in mind.

Performance Features

Thermal Efficiency. The VLX 500 frame is built with a thermal break, separating the interior and exterior aluminum so the frame itself does not conduct heat between the inside and outside. In San Francisco, where homes rarely have air conditioning and fog arrivals can drop the temperature 10 degrees in an hour, that break keeps indoor temperatures steadier. Pair it with Low-E glass and you get NFRC-rated energy performance that genuinely reduces how hard your heater works in July.

Acoustic Performance. Noise in San Francisco is not an abstract concern. Bus routes, Muni lines, and dense residential blocks mean a window that seals tightly and uses laminated glass where needed makes a room measurably quieter. The VLX 500’s aluminum frame holds its seal over time, and laminated glass adds real mass to the panel, cutting down the sound that leaks through the glass surface itself. For homes near the 24 bus corridor or within sight of 19th Avenue, this matters.

Airtightness & Weather Seal. Sliding windows are often the leakiest openings in a house; the VLX 500 is engineered the opposite way. The interlocking meeting rails and compression gasketing keep San Francisco’s persistent wind-driven air from seeping around the panels. We also install every perimeter joint with AAMA 812 low-expansion foam sealant, which keeps the air seal at the wall and window junction intact for years.

Waterproofing. Horizontal sliders need proper drainage, and the VLX 500 handles that at the sill with integrated weep channels. During installation, Lightwell Windows San Francisco follows AAMA 2400/2410 standards for flashing and waterproofing. After install, we run a controlled water test on the exterior side to verify that nothing is getting through. In a city that gets rain from three different angles in the same afternoon, that test matters.

Wind Resistance. The VLX 500 is engineered for wind-load ratings that meet or exceed San Francisco structural requirements, including parts of the city designated for higher exposure. The thicker 0.079-inch aluminum wall makes the frame stronger overall, but the critical part is that we size and anchor every unit to the actual conditions. Windows on a top-floor Pacific Heights flat face different loads than a ground-level unit in the Mission.

Security & Hardware. The rail and roller hardware on the VLX 500 is designed to stay adjusted, which means no sagging panels that can be lifted or jimmied out of the track down the road. The locking mechanism is built into the meeting rail, and the laminated glass option adds significant resistance to forced entry and impact. For street-facing windows in San Francisco, the combination of laminated glass and a properly anchored frame is real security, not just a label.

Color & Glass Options

Finish choice is one of the first decisions on any VLX 500 project, and San Francisco’s housing stock supports the entire palette. Premium Black and Pure White are the clean architectural options; black frames read as a crisp outline around the glass in contemporary remodels in the Mission and Potrero Hill, while white disappears into traditional trim on Victorians and Edwardians. Anodized Silver is the raw-metal look that works beautifully on mid-century buildings and warehouse conversions in SoMa. Bronze and Champagne bridge old and new; they sit comfortably on pre-war facades in Pacific Heights and Presidio Heights without looking dated. Teak Wood is a powder-coated wood grain finish for homes where interior or exterior wood trim is already established and a painted metal look would clash.

Glass is about function as much as appearance. Clear glass maximizes visible light, ideal for north-facing rooms that already get softer light. Frosted gives privacy where neighbors are close or a bathroom or hallway needs light without exposure. Low-E is the energy-performance choice, and in San Francisco it’s usually our default recommendation because it reduces radiant heat loss without darkening the room. Tempered glass is required by code near doors, at floor level, and in other safety-glazing zones. Laminated glass adds impact resistance and acoustic dampening; it’s the upgrade for street-level windows, storm-prone corners, and bedrooms that face traffic.

Screens come two ways. A Retractable Screen tucks away into the frame when you want clean, uninterrupted glass, which is why clients on view lots love it. A Sliding Screen stays in place and is more durable for windows that get opened and closed all day, every day.

Installation by Lightwell Windows San Francisco in San Francisco

Installation is where a great window either performs for 20 years or becomes a slow leak and a warranty fight. We see poorly installed sliders all over San Francisco, and the pattern is usually the same: the window was bought online, installed by a crew that wasn’t accountable to the manufacturer’s installation standard, and now air and water move through the wall itself, not the window.

Lightwell Windows San Francisco installs every VLX 500 unit the same way. First we inspect the existing opening, looking at framing condition, water damage, and whether the wall is square enough for the new unit or needs correction. We set every window level, plumb, and square, and we shim and fasten to the manufacturer’s engineering requirements. The perimeter is sealed with AAMA 812 low-expansion foam at every joint, not just where it’s easy to reach. At the exterior, we flash to AAMA 2400/2410 standards, which covers everything from pan flashing to proper drainage paths. Then we run a water test on the finished installation before we consider the job done, and we clean the site to a standard that makes it look like we were never there except for a very straight new window.

Why does this matter in San Francisco specifically? Our climate is damp, fog-driven, and unusually punishing on window-to-wall junctions. A gap in flashing that causes minor trouble in a dry climate becomes dry rot, mold, and failed sheetrock here within two or three winters. San Francisco building code also has safety-glazing requirements around certain window locations, and improper installation can put a window out of compliance. And here’s the part worth underlining: if a VLX 500 is not installed to the manufacturer’s published standard, the warranty is void before the caulk dries. Professional installation is not optional; it is the only way to protect the window, the wall, and the warranty.

Frequently Asked Questions – VLX 500 Sliding Window

What is the lead time for the VLX 500 Sliding Window in San Francisco?

Lead time depends on the configuration and finish, but in the current San Francisco market, most VLX 500 orders run four to eight weeks from finalized measurement and deposit to delivery at our local warehouse. Custom sizes and less common finishes stretch the schedule. We confirm an exact lead time for your specific configuration before you commit. Call (831) 480-4124 for a current estimate on your project.

Does the VLX 500 Sliding Window qualify for energy tax credits?

Potentially. The VLX 500 is NFRC-rated, and the Low-E glass configuration often meets the performance thresholds for federal and California energy programs available in the San Francisco area. Eligibility depends on your specific glass choice and tax year. We’ll give you the performance data for your configuration so you can check it against your accountant’s current credit checklist. Call (831) 480-4124 and we’ll walk through the numbers.

What warranty comes with the VLX 500 Sliding Window?

The VLX 500 carries a manufacturer warranty from ViewLux, and as an authorized partner, Lightwell Windows San Francisco installs every unit to the standard that keeps that warranty valid. The exact terms depend on your configuration and finish. We also stand behind our own installation workmanship, which is accountability you lose when you buy online and hire an anonymous crew. Call (831) 480-4124 for the warranty terms relevant to your order.

Can I customize the size of the VLX 500 Sliding Window?

Yes. The VLX 500 is built to order, which means we measure your actual San Francisco opening and order the unit to those dimensions rather than forcing your wall into a stock size. This is especially useful in older San Francisco buildings where openings are rarely square and never standard. The 2-track and 3-track options also let you choose between a larger fixed panel with more glass or a wider opening for ventilation. Call (831) 480-4124 to schedule a measurement.

How do I maintain aluminum frames on the VLX 500 in a coastal climate like San Francisco?

Aluminum frames need very little, but they do need a rinse. In San Francisco’s salt-tinged fog zones like the Outer Sunset and the Richmond, salt residue can build up on any frame over time. Twice a year, wipe the tracks with a dry brush or vacuum, wipe the frames with a mild soap and water solution, and keep the weep channels clear. Avoid abrasive cleaners because they can dull the finish. Beyond that, the VLX 500 is designed to be genuinely low-maintenance for San Francisco living. Call (831) 480-4124 if you want a maintenance walkthrough for your specific exposure.

Get a Quote – VLX 500 Sliding Window in San Francisco

A VLX 500 project starts with a conversation and a measurement. Call Lightwell Windows San Francisco at (831) 480-4124 to schedule a free on-site consultation. We’ll measure your openings, discuss track configuration, glass, and finish, and deliver a written, line-item quote with no change orders after the fact. From the first measurement through the final water test, you’re working with one team, in San Francisco, that stands behind the window and the installation.

Written by the team at Lightwell Windows San Francisco, an authorized ViewLux installation partner serving San Francisco, CA.