Every week someone asks me for 20% tint on their front windows. Sometimes they mention another shop already quoted it. I understand the appeal, and we still won’t install it. Here is why, in enough detail that you can make your own decision rather than taking my word for it.
The actual rule
California window tint is governed by Vehicle Code section 26708. Window by window:
| Window | What is allowed |
|---|---|
| Windshield | A non-reflective strip across the top four inches, or above the AS-1 line. Nothing below it. |
| Front side windows | Must transmit at least 70% of visible light. |
| Rear side windows | Any darkness. |
| Rear window | Any darkness, if the vehicle has dual side mirrors. |
Rear glass is wide open. You can run limo tint on everything behind the driver and be completely legal. That surprises people who assume California bans dark tint outright. The front is where it gets strict.
The detail almost everyone misses
The 70% figure isn’t a rating on a box of film. It’s the measurement of your glass and the film together, after installation.
That changes everything. Your factory glass already blocks some light on its own, so you’re starting from a number below 100 and going down from there. To keep the combined measurement at or above 70%, the film itself generally needs to transmit around 88% or higher. That’s a nearly clear film.
This is why we won’t install 35% on your front doors. It isn’t close to the line. It’s roughly half of what the law allows.
Where the line falls
5% limo20%35%50%70%88% film
Everything left of the red line is illegal on front side windows. Everything on the scale is legal on rear glass.
How it gets enforced
CHP officers carry calibrated tint meters. They clamp the meter to the glass and it reads the combined transmission directly. There’s no judgement call and no arguing about what the film was rated at, because the meter measures the result rather than the product.
A tint violation is often a fix-it ticket: remove the film, get it signed off, pay the court fee. But by then you’ve paid for installation, paid for removal, and paid the fine, and the film you bought is in a trash bag.
So what do I actually install?
The configuration nearly every reputable California shop uses:
Front side windows. A high-VLT ceramic film, typically 80% or above. It looks nearly clear and it won’t give you privacy or a darker appearance. What it will do is reject a large share of infrared radiation, which is the part of sunlight you actually feel as heat, and block essentially all UV. Those are the two things making your commute miserable and cooking your dashboard. Ceramic film separates heat rejection from darkness, which older dyed films could never do — the only way dyed film cut heat was by being dark.
Rear side windows and rear glass. Whatever you want. This is where you get privacy and appearance.
Windshield. The top strip, or a high-clarity 70%+ ceramic film across the full glass, which some products do achieve. If your commute faces into the afternoon sun, a full windshield film is the single biggest comfort upgrade available.
The medical exemption
Vehicle Code 26708.2 allows darker front tint for people with qualifying photosensitivity conditions — lupus, certain skin cancers, and other diagnoses where sun exposure is a real medical problem. It requires a signed statement from a licensed physician or optometrist specifying the minimum VLT you need, and the documentation stays in the vehicle.
If you have that, bring it and we’ll install to your specification. If you don’t have a qualifying condition, please don’t chase this route. A fraudulent exemption is a much worse problem than a tint ticket.
Questions worth asking any installer
- Will you measure my factory glass before recommending a film? If they will not, they’re guessing at the combined number.
- Will I get a certificate of compliance? It lives in your glovebox and it’s what you show at a stop.
- What is the warranty on color stability? Cheap dyed film purples and bubbles, usually within a few years in this climate.
- Is this film metallic? Metallic films interfere with phone, GPS and tires pressure sensors. Ceramic does not.
Getting it done around here
We install tint mobile, at your home or office, anywhere in Temecula, Murrieta, Menifee and the surrounding valley. We measure your glass, recommend a film that’s both legal and actually effective, and hand you the compliance certificate at the end.
If you want the dark look, we get it on the rear. If you want the heat gone, ceramic up front does far more than most people expect from a film they can barely see. See the window tinting page or request a quote.
Common questions
Can I get 35% tint on my front windows in California?
No. Front side windows must transmit at least 70% VLT measured with the glass and film combined, which rules out 35%.
Is 5% limo tint legal anywhere on my car?
Yes, on rear side windows and the rear window, provided the vehicle has dual side mirrors.
Does factory privacy glass count?
Factory-tinted rear glass is fine as delivered. It’s aftermarket film on the front that’s regulated.
Do panoramic glass roofs count as rear glass?
Generally yes, they’re treated as rear glass rather than windshield.
Want it done legally and properly?
We measure your glass, spec the film, and hand you the certificate.
Request a quote