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Window film, explained plainly
Short answers to what homeowners ask us most. Exact figures for a specific film are given on its specification sheet at quote.
Why rooms get hot and floors fade
Sunlight carries visible light, infrared (heat) and ultraviolet. Glass lets most of all three through. Window film is a thin layer on the glass that holds back a share of the heat, glare and UV before they reach the room.
The result you notice: a more even room, less squinting at screens, and furniture and floors that are exposed to less of what causes fading. Fading is also driven by visible light and heat, so no film stops it entirely.
Illustration only: not to scale and not a performance chart.
Frequently asked questions
What is the difference between ceramic and metallic film?
Ceramic film uses non-metal ceramic particles, so it keeps a natural look and does not interfere with Wi-Fi or mobile signal in the way a metal layer can. Metallic and reflective films use a metal layer and look more mirror-like from outside. Reflective is special order at HeatNox.
Will film make my room dark?
It depends on the film. Nano-ceramic and clear security films keep rooms bright; darker or reflective films reduce more light. We show you a sample against your own window before you decide.
Can film go on every window?
Not always. Some glass, such as certain double-pane or tempered units, can be stressed by the wrong film. We check your glass and the film type before quoting, and tell you plainly when a window is not a good fit.
Will film stop fading completely?
No. Film reduces how much UV and heat reach your furnishings, which helps, but visible light also contributes to fading, so nothing stops it entirely.
Does film block my view?
Clear and nano-ceramic films keep your view. One-way privacy and reflective films are more noticeable and work best by day; they are special order.
What is security and safety film for?
A clear, thicker film that helps hold glass together if it is struck. It is meant to slow down break-ins and reduce flying glass. It does not make glass unbreakable.
What does Low-E film do?
It reduces heat moving through the glass in winter as well as summer, helping rooms feel steadier. Whether it affects mobile signal depends on the product; we confirm that at quote.
Is film permanent?
Film is applied to the inside of the glass and can be professionally removed. Removal is easier when planned for, so tell us if you rent or may replace windows soon.
How do I get a quote?
Call 
or use the contact page, and tell us your address and your main goal (heat, glare, privacy, security, or fading). Quotes and estimates are always free.
How much does window film cost?
Every home is different, so we quote each job on its own. The price depends on the film you choose, how many windows and how large they are, the type of glass, how easy the glass is to reach, and the warranty tier. Price ranges will be published here soon. Until then, quotes and estimates are always free, and a quote names the exact film.
How long does window film last?
That depends on the film, the glass and the window direction. We provide the written warranty terms before you decide, so you can see exactly what is covered and for how long. Ask for them with your free quote.
Which film for which goal?
Nano-Ceramic
Our everyday recommendation for living rooms, bedrooms and offices that face the sun.
ThermaCore Security (clear)
For ground-floor glass, doors and anywhere glass breakage worries you.
ThermaCore Low-E
For rooms that are hard to keep steady in both hot and cold seasons.
Typical construction, simplified. Layers differ by product.
What is in window film?
Window film is a thin, layered sheet. An adhesive bonds it to the inside of the glass. The film layers do the work of managing light and heat, and a hard protective coating on the room side makes it cleanable.
Different films use different layers: ceramic particles, thin metal layers, clear safety layers or low-emissivity coatings. That is why we match the film to your glass and your goal.
Which windows get the most sun?
In Texas, west-facing windows take the hottest afternoon sun and south-facing windows get strong sun for most of the day. North-facing windows get the least direct sun. Trees, eaves and neighboring buildings change this window by window.
Start with the rooms where you feel the heat or glare most. That is usually where film pays off first.
Illustration. Blue bars mark the south and west sides.
Myths and facts
“Film makes every room dark.”
Fact: clear and ceramic films keep rooms bright. Darker and reflective films reduce more light, and we show you a sample first.
“Film stops all fading.”
Fact: it reduces what reaches your floors and furniture, but visible light also contributes to fading.
“Any film goes on any window.”
Fact: some glass can be stressed by the wrong film. We check the glass before we quote.
“Safety film makes glass unbreakable.”
Fact: it helps hold glass together if it breaks. It does not stop the glass from breaking.
“Home film is the same as car tint.”
Fact: building films are made for flat building glass and are chosen for the window type, not just the look.
“Bigger numbers always mean better.”
Fact: one flattering number can hide trade-offs. Look at the whole spec sheet for the exact film.
“Film only matters in summer.”
Fact: some films, such as low-E, also help slow heat loss through the glass in cold weather.
“Film is always fine for my window warranty.”
Fact: some window makers limit what can be applied to their glass. Check your window maker’s paperwork before you decide, and tell us what it says so we can match the film to your glass. We cannot change their terms.
Terms you will hear
| Term | Plain meaning |
|---|---|
| Single-pane | One sheet of glass. Often the easiest to treat, and the one that leaks the most heat. |
| Double-pane | Two sheets with a sealed gap. Needs a glass check before film, because trapped heat can stress it. |
| Tempered glass | Heat-strengthened glass that breaks into small pieces. Common in doors and low windows. |
| Laminated glass | Two sheets bonded around a plastic layer, so it holds together when cracked. |
| Low-E glass | Glass with a thin coating that already reflects some heat. We check it before adding film. |
| Solar control film | Film aimed at reducing heat and glare from the sun. |
| Safety film | A thicker clear film that helps hold glass fragments together. |
Questions to ask any installer
Here is how we answer the ones we can answer today. Ask us anything else before you decide.
- Will you check my glass type before quoting? Yes. We confirm your glass suits the film first.
- Can I see the spec sheet for the exact film? Yes. It comes with your quote.
- Who installs, and who do I call after? Kexova installs, and you call Kexova.
- Where can I read the written terms? Warranty terms are given in writing before you decide.
Not sure which one fits?
Send your address and your main goal, and we will take it from there.
Get a free quoteWindow film, matched to your glass and installed by Kexova.
Serving the greater Austin, Dallas, Houston and San Antonio areas.
Performance depends on the film, the glass and the window orientation. Specification sheets are provided at quote.
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