Single Hung Windows

Single Hung Windows in Los Angeles, CA | Westlight Windows & Doors

Single hung windows are one of the most common impact-rated replacement profiles we install in greater Los Angeles, and for good reason. The design is simple: a fixed upper sash and an operable lower sash, both glazed with laminated impact glass rated to Florida Building Code standards. If you live in a wind-exposed neighborhood like Encino, Tarzana, Sherman Oaks, or anywhere along the 405 corridor where wind gusts funnel between the hills, this is a proven window profile that holds up. Westlight Windows & Doors supplies and installs single hung impact windows across our PGT, CGI, CWS, ES Windows, ECO, and Mr-Glass lines, and we do the installation ourselves, not through a subcontractor. Call (903) 354-7134 to talk through your project.

Call (903) 354-7134

Product Overview - Single Hung Windows

A single hung window gives you a fixed upper sash and a lower sash that slides up to open. That is the whole idea, and it is why this profile shows up on so many Florida and California homes: fewer moving parts than a double hung, a tighter air seal, and a clean sightline that suits everything from mid-century ranches in Van Nuys to Mediterranean-style builds in Woodland Hills. When you pair that simple profile with laminated impact glass, you get a window that stays in the opening when debris hits it, and that makes it a workhorse for hurricane-prone construction anywhere in Los Angeles, CA.

The engineering worth knowing about is in the glass and the frame. The upper sash never moves, which means the window’s structural weak point, the operable joint, is limited to one horizontal line instead of two. That translates to less air infiltration and fewer places for water to intrude during heavy wind-driven rain. The lower sash rides on a balance system that we adjust during install so it glides without binding, even on larger openings where the sash weight is substantial. For Los Angeles homeowners replacing original 1970s or 1980s aluminum windows, the jump in build quality is immediately noticeable, and if you are in a neighborhood with strict HOA rules, single hungs are typically an accepted replacement profile because they preserve the original look.

Call (903) 354-7134 and we will walk you through which frame material and glass package makes sense for your home and your wind zone.

Technical Specifications

Here are the build options we offer on single hung impact windows in Los Angeles, CA:

• Frame materials: Extruded aluminum or vinyl. Aluminum gives you the slimmest sightlines and a more rigid frame for wide openings; vinyl is the better thermal performer and a popular choice for stucco-walled homes in the Valley.
• Glass options: Laminated impact glass with a PVB interlayer, Low-E insulated glass, tinted glass, and clear glass. You can stack these options: for example, a laminated outer lite with a Low-E insulated inner lite for impact protection plus thermal performance.
• Finish colors: White, Almond, Bronze, Black, and Tan. These are the standard powder-coat or vinyl extrusion colors, and they cover most Los Angeles exterior palettes, including warm stucco tones and darker trim schemes.
• Screen options: Half screen or full screen. A half screen covers only the lower operable sash area; a full screen spans the full window opening.
• Design pressure: Matched to your wind zone, up to +100 / -100 PSF, never higher. Westlight does not over-spec a window beyond what your site actually requires.
• Compliance documentation: Miami-Dade NOA and Florida Product Approval numbers are available per configuration and are verified on your specific quote before you sign.

Hurricane & Compliance Performance

Laminated Impact Glass
The glass package uses a PVB (polyvinyl butyral) interlayer bonded between two panes. Under impact, the glass fractures but the interlayer holds the pane in the frame, preventing wind and water from entering the opening. That is the core function of every impact window we sell in Los Angeles, CA, and the primary reason building departments accept this product for windborne debris regions.

Miami-Dade NOA / FL Product Approval
Each configuration in our single hung lineup carries Miami-Dade NOA (Notice of Acceptance) and Florida Product Approval documents. These are issued per configuration, not blanket approvals, which means the specific size, glass package, and frame you choose has its own number. We verify that number on your specific quote and provide it with your permit submittal.

FBC / HVHZ Compliance
The product is engineered to Florida Building Code (FBC) High-Velocity Hurricane Zone (HVHZ) requirements. That is the strictest hurricane code standard in the United States, and it applies even though we are installing in Los Angeles, CA. You get the same construction whether the window is going into a house in Broward County or a condo in Westwood.

TAS 201 / 202 / 203 Testing Context
HVHZ-rated products are tested under a specific protocol family: TAS 201 covers large-missile impact, TAS 202 covers cyclic wind-pressure loading that simulates a full hurricane passing over the building, and TAS 203 covers forced-entry resistance. These are the tests that back up the NOA, and they are why an impact-rated single hung is a fundamentally different product from a builder-grade window.

Design Pressure for Your Wind Zone
We match design pressure to your specific wind zone in Los Angeles, CA, up to +100 / -100 PSF, and we never go higher than the site requires. Over-specifying design pressure adds cost without adding protection. Our team calculates the right rating from your address, your elevation, your exposure category, and your local building department’s wind load requirements.

Energy Performance
For energy performance, Low-E and insulated glass options are available across the single hung lineup. Low-E coatings cut solar heat gain, which matters on west-facing walls in Los Angeles, CA, where afternoon sun pounds the glass for six hours straight in summer. Insulated glass adds a second thermal barrier, and when combined with a laminated outer lite, you get impact protection and a meaningful improvement in comfort.

Color & Glass Options

The five finish options, White, Almond, Bronze, Black, and Tan, cover the ground for most Los Angeles architectural styles. White and Almond are the pragmatic choices for stucco homes in the northern Valley and older ranch-style neighborhoods, where the window has to disappear into a light facade. Bronze and Black suit the darker trim lines on modern builds and the Spanish and Mediterranean revival homes common in places like Studio City and the hills around Encino. Tan sits between the two: warm without being cream, and it works especially well against beige or sand-toned stucco.

On the glass side, clear laminated impact is the standard choice when you care most about preserving the original look of the home. Tinted glass cuts glare and solar heat, and it reads as a design decision, not just a utility upgrade. Low-E insulated glass is what we recommend on any elevation that faces direct sun and on any home where you are already replacing the windows and want the thermal upgrade at the same time. You can also spec Low-E without insulation, or insulation without Low-E, depending on your priorities and budget in Los Angeles, CA.

Installation by Westlight Windows & Doors in Los Angeles

Installation is where an impact-rated window either performs to its NOA or doesn’t. A window that leaves the factory with a Miami-Dade NOA can be compromised in a single day by an installer who sets it out of square, seals it with the wrong product, or fails to anchor it to the wall system properly. That is why Westlight Windows & Doors installs every single hung window with our own crew, following AAMA 2400/2410 standard practice for installation of windows in exterior walls, with an AAMA 812 low-expansion foam perimeter sealant at the wall-to-frame joint. We don’t sub this work out, and we don’t cut corners on sealant to save time.

Our process starts with a pre-install inspection at your home in Los Angeles, CA. We check the rough opening, look for water intrusion or framing damage around the old window, and measure in three places for width and height so the new window is ordered to the actual opening, not a guess. On install day, we set the window level, plumb, and square before fastening, because a window that is racked even a quarter inch will bind the sash and compromise the water seal. After setting, we apply the AAMA 812 foam perimeter sealant, flash the opening, and run a final water test to confirm the seal is doing its job before we reinstall interior trim and clean the site.

Los Angeles brings its own considerations. Homes near the coast face salt air corrosion and wind-driven rain; homes in the hills face higher wind speeds and more exposure. If your property sits in a coastal zone or a hillside wind corridor, we factor that into the anchoring and flashing details. We are also familiar with local permitting requirements in Los Angeles, CA, and we provide the NOA and Florida Product Approval documents your plan checker asks for when you pull a permit. Call (903) 354-7134 to schedule an on-site measurement and walkthrough.

Frequently Asked Questions - Single Hung Windows

What wind zone / design pressure is the Single Hung window rated for?
The single hung window is rated for design pressures matched to your specific wind zone in Los Angeles, CA, up to +100 / -100 PSF, never higher. We calculate the exact rating needed from your address, exposure category, and elevation, and we match the window to that number rather than selling you more window than the site requires.

What is the lead time on single hung impact windows?
Lead time varies by manufacturer and configuration. Our PGT, CGI, CWS, ES Windows, ECO, and Mr-Glass lines all run different production schedules, and custom sizes or unusual glass packages can extend the timeline. When you request a quote, we give you a written lead time estimate for your specific configuration, not a generic answer. Call (903) 354-7134 and we will check current production windows for the line you are interested in.

Does my permit require a Miami-Dade NOA or Florida Product Approval submittal?
Yes, if your project is in a High-Velocity Hurricane Zone and your building department requires windborne debris protection documentation for window replacements. We provide the NOA and Florida Product Approval numbers for your specific configuration on your quote, and we include those documents with your permit submittal in Los Angeles, CA. If your plan checker needs additional pages from the approval, we pull those for you.

Can I customize the size or configuration?
Yes, within the approved size range for the product line you select. Single hung impact windows are available in a wide range of widths and heights, and we can spec custom sizes for unusual openings. Every custom size must still fall within the NOA-approved parameters for the configuration, so we verify the size against the approval documents before ordering. Call (903) 354-7134 with your rough opening dimensions and we will tell you what is possible.

How do I maintain the frame and glass?
Wash the glass with mild soap and water, rinse with clean water, and dry with a soft cloth. Clean the lower sash track a few times a year to keep the sash operating smoothly, and check the weep holes at the bottom of the frame to make sure they are clear of debris. For aluminum frames near the coast in Los Angeles, CA, an occasional rinse helps remove salt residue. Do not use abrasive cleaners or power washers on the frame or glass.

Get a Quote - Single Hung Windows in Los Angeles

If you are replacing windows in Los Angeles, CA and want single hung impact windows with real NOA documentation and professional installation, start with a free on-site measurement. We will measure your openings, walk you through frame, glass, and finish options, and give you a written line-item quote. Call (903) 354-7134 to schedule your estimate with Westlight Windows & Doors.