One of the most common questions we get from New Orleans homeowners is: does window film actually block UV rays? The short answer is yes. Quality window film blocks 99 percent of ultraviolet radiation. But what does that mean for your home, your family’s skin health, and your belongings, especially in a Gulf-coast climate where UV exposure runs higher year-round than most of the country?
At Big Easy Home Tint, we install UV-blocking film in homes across Orleans, Jefferson, and St. Tammany Parish every week, and the UV-protection conversation comes up at almost every consultation. Dermatologists in New Orleans have started recommending window film as part of comprehensive sun protection, especially for people who work from home or spend significant time near windows.
This guide walks through exactly what UV is, what standard glass lets through, what film actually blocks, and which rooms in a New Orleans home benefit most.
If you would rather have us assess your specific windows in person, contact us for a free UV-protection consultation.
Understanding UV Radiation
Ultraviolet light is electromagnetic radiation with wavelengths shorter than visible light. It is divided into three categories.
UV-C (100 to 280 nm)
The most dangerous type, but almost entirely blocked by Earth’s atmosphere. Not a significant factor for windows in any climate.
UV-B (280 to 315 nm)
Causes sunburn and contributes to skin cancer. Most glass blocks UV-B reasonably well on its own, but not completely.
UV-A (315 to 400 nm)
The “aging” rays that penetrate deeper into skin and cause long-term damage. UV-A passes through standard glass easily, up to 75 percent transmits through clear residential windows. This is the UV that fades your furniture and reaches your skin while you sit at your home office desk in Lakeview or your sunroom in Mandeville.
What Standard New Orleans Windows Allow Through
Standard clear glass blocks most UV-B but allows significant UV-A transmission. This is especially important in our market because our annual UV index runs higher than most of the country.
- Single-pane clear glass: Allows 70 to 75 percent of UV-A through (common in historic Garden District, Bywater, and Marigny homes)
- Double-pane clear glass: Allows 60 to 70 percent of UV-A through
- Low-E coated glass: Varies widely, typically 25 to 50 percent UV-A transmission
Even with modern windows in new Northshore construction, substantial UV radiation enters your home. That is why items near windows fade over time even when they are not in direct sunlight.
Window Film UV Performance
Quality window films, whether ceramic, carbon, or even basic dyed, block 99 percent of UV radiation across both UV-A and UV-B spectrums. This is one specification where even budget films perform well, because UV-blocking additives are inexpensive to include during manufacturing.
The 99 percent figure is not marketing exaggeration. It is tested and verifiable using spectrophotometer measurements at UV wavelengths.
Fading Prevention Benefits for New Orleans Homes
UV radiation is the primary cause of fading in interior materials, and in our climate the damage accumulates faster than people realize.
What Fades and Why
- Hardwood floors: UV breaks down lignin in wood, causing yellowing and color change (a real issue in historic New Orleans homes with original pine and oak)
- Upholstery and fabrics: UV degrades dyes, causing colors to fade unevenly
- Artwork and photographs: UV causes chemical changes in pigments and paper
- Leather furniture: UV dries and cracks leather over time
- Antique pieces: Common in New Orleans homes, often irreplaceable once faded
The Fading Equation
While UV is the primary factor, fading has multiple causes:
- UV radiation: roughly 40 percent of fading
- Visible light: roughly 25 percent of fading
- Heat: roughly 25 percent of fading
- Other factors: roughly 10 percent (humidity, chemical exposure)
Window film addresses all three major factors at once. It blocks 99 percent of UV, reduces visible light (depending on VLT selected), and significantly reduces heat. No solution eliminates fading entirely, but film dramatically slows the process.
SPF Equivalent Comparison
Here is a helpful way to think about window film’s UV protection in a New Orleans context.
Standard clear glass provides roughly SPF 3 to 5 protection, which is minimal. With 99 percent UV-blocking window film, the protection increases to approximately SPF 100 to 200 equivalent.
This matters if you spend significant time near windows. People who work at desks near windows in Metairie or Mandeville home offices, or in sunrooms across the Northshore, accumulate UV exposure during every workday. While filmed windows are not a substitute for sunscreen outdoors, they dramatically reduce indoor UV exposure.
A Note on Dermatologist Recommendations
New Orleans dermatologists increasingly recognize window UV exposure as a serious concern. The “trucker’s tan” phenomenon, where drivers develop more sun damage on their left side from years of driving in our sun, demonstrates how UV accumulates through any glass over time. Many local dermatologists now recommend window film as part of comprehensive sun protection for clients with elevated skin cancer risk.
Practical UV Protection Scenarios in New Orleans Homes
Home Offices
If your desk is near a window, you are receiving UV exposure during every workday in our high-UV-index climate. Film protects both you and your equipment (monitors, electronics, furniture).
Living Areas with Valuables
Antique furniture, Oriental rugs, artwork, and family photographs all benefit from UV protection. These items often cannot be replaced once faded, especially heirloom pieces common in older New Orleans homes.
Nurseries and Children’s Rooms
Children’s skin is more sensitive to UV damage. Film adds protection without darkening the room significantly when using higher VLT options.
Entryways and Stairs
Areas with significant glass that receive direct sun often show the most dramatic fading on flooring and decor. Historic New Orleans homes with transom windows and side lights are especially vulnerable.
Verifying UV Claims When Comparing Installers
When evaluating window film, ask for the UV rejection specification tested at the full UV spectrum (280 to 400 nm). Some manufacturers test at narrower ranges to inflate the numbers.
Any quality film from a reputable manufacturer will legitimately hit 99 percent across the full UV spectrum. If a film claims less than 95 percent UV rejection, it is likely old stock or a substandard product that should not be on a New Orleans home in the first place.
Get UV Protection That Actually Holds Up in New Orleans Sun
The good news: UV rejection is essentially a solved problem for quality film. The question is not whether film blocks UV, it is whether you want the other benefits that come with it: heat rejection, glare reduction, fade prevention, and energy savings across the long Gulf-coast cooling season.
Here at Big Easy Home Tint, we walk every room with you, identify the high-UV-exposure windows, and recommend the right film grade for each. UV protection is included in every quality film we install.
Call us today at 504-676-5121 to schedule a free in-home UV assessment anywhere in the Greater New Orleans area.
Frequently Asked Questions
Does window film actually block 99 percent of UV in New Orleans sun?
Yes. The 99 percent UV rejection figure is tested at the full UV spectrum (280 to 400 nm) and verified with spectrophotometer measurements. It is real and consistent across film types, from basic dyed to premium ceramic.
Will UV-blocking film work on older single-pane windows in historic homes?
Absolutely, and it is one of the highest-value upgrades for historic Garden District, Bywater, and Marigny homes. The original sash windows let through 70 to 75 percent of UV-A, and adding quality film cuts that to under 1 percent.
Can I still get a sunburn through window film?
Extremely unlikely. With 99 percent UV rejection, the residual UV that gets through is too low to cause acute sunburn under normal conditions. Cumulative exposure over years is also dramatically reduced, which matters most for skin cancer risk.
Will UV-blocking film prevent my hardwood floors from fading?
It dramatically slows the process. Quality film cuts UV (primary fading cause), reduces visible light, and reduces heat, addressing all three major fading factors. Floors near filmed windows hold their color years longer than unfilmed sections.
Do all window films block UV equally, or do I need to pay more for it?
Most quality films from reputable manufacturers hit 99 percent UV rejection regardless of price tier. Where film grades differ is heat rejection, longevity, and aesthetics. Do not pay a premium just for UV blocking; pay for the other benefits.
Will UV film change how my New Orleans home looks from outside?
Modern UV-focused films are nearly clear and invisible from outside. The room behind the film looks normal from the street. Only highly reflective film grades create the obvious mirrored appearance, and those are typically chosen for other reasons.
Can UV-blocking film help protect my children from sun exposure indoors?
Yes, especially in nurseries and bedrooms with significant window glass. Children’s skin is more sensitive to UV damage, and indoor exposure accumulates during nap times and play. Film provides high SPF-equivalent protection without darkening the room.
How quickly will I notice the difference after installing UV-blocking film?
Skin and eye comfort improvements are noticeable within the first sunny day. Fade prevention is invisible in the short term but obvious in the long term, especially when comparing filmed rooms to unfilmed sections of the same home several years later.