If I tint a double pane window

If I tint a double pane window will the outside glass break in the winter? Been told it would if so is there a way to tint it so that dosen't happen

i tint double pane windows every day of the week and we have some harsh winters. no issues if you know what film to install.

get it professinaly installed . The wrong film will damage the seals aroung the glass. You wil get condensation iin between the glass if the seals break

What tint
I was looking at dual reflective 05%
I know it is dark but I live in Oklahoma where the sun never quits and the temp gets to 103

i don't have personal experience with a DR 5%...so i don't know the heat absorption specs on it.

yes duel reflective will be fine for those windows as long as the heat absorbtion is less than 48% I have heard other numbers like some film companies films are garranteed and over 50% like geo shield. Hanita's opt 5% is nice 85% tser on single pane and its absorbtion is 39% "very safe"

sorry if that thread wasnt very clear

I'm old so most things are not clear.
Thanks

No mention of glass size. The larger the size the more likely it would be to break - and the more expensive it would be to replace if it did break. And if there was a break, it would most likely be on the INSIDE Glass, not the outside.

i use sungard 15% silver cause its a low e film and they warranty the film no problem pics are of double pane windows

the emissivity specs on that film do not qualify it as a "low e" film. hopefully you're not telling your customers that.

that is straight from my rep at sungard

http://sun-gard.com/documents/L955430%20Fl...pat_USA_web.pdf

this is a film to compatibilty chart to show you what sun gard film can be applied to what type of windows read it and check out the line that says silver 15 low e film then aproved for double pane windows and more get back to me

http://sun-gard.com/documents/L955430%20Fl...pat_USA_web.pdf
check the link i think you will learn something new today
then i expect im sorry your right

low e the E stands for emissivity. I thought

damn shame to do residential in something that reflective. What do you need Low E for in Florida?

its so that when you have a double pain window and you tint it from the inside with the florida heat the window doesnt build up heat to much so it crack the glass .its better to put the silver exterior film on the out side of the double pain window so heat doesnt crack it but if the customer doesnt want that then a low e film to on the inside to help the problem of cracking . you can't use anything black or smoke gray cause of this problem only reflective film.

Keep it up guy's I'm learning!

I understand what you are trying to say but when you look into why thermal stress fracturing happens and what the glass limitations are, you will find that it is more of an issue of temperature difference along the surface of the glass rather than solely film SA. If the glass is sound and there is no shadowing you can use just about any film you want in FL.

you can use nr dyed film on dual pane windows. there isn't any warranty.

for those of you who can find an old auto sample book, any brand. the manus. use to state the absorbtion of the film. you can actually install a nr 05 on dual pane windows. i believe nr 05 has an absorbtion of 45 or less. they took it out to simplify it for the tint shops. they began to control what you thought "no auto film on dual pane window because it will break". not so true.
this made you buy more film, this could be a conspiracy for the manus..
remember hp auto film will break, but nr won't. ask the technical or r&d department from any major manu. or find a old auto book.
wow, now you get to see what color stable film actually will last. scarry.

i had no idea sungard had a silver 15 low e film. so i guess i did learn something today.



first off....florida isn't the only place with heat. it's been around 100 here for a month. plenty of films can be installed on DP windows on the interior. installing exterior film is only done by me as a LAST resort. and again....low e means emissivity through the film. it's an insulating factor. any reflective film like that whether low e or not would usually be fine for DP application. which you can see by your link. most all those films are approved for installation, other than the dark neutrals and the coloreded films.

Blade,
there are many untruths being told out there....................this is one............I have a competitor telling his prospects that his LULU will cut the heat LOSS throught the windows by more than 50% in the winter. And when I called LULU techs, they say all day that it reduces no more than 10 to 15%. Lies get told all the time................Hopefully the custy will read through the bullchips and i would love to see the independent testing data to backup that claim on a low E film...............

There really isn't any need to apply a low-e film in a hot climate. In fact, depending on what the air conditioning of the building is like, it can work against you. Contrary to what some manufacturer representatives will tell you, it does not also help in the summer, and window films don't know what season it is. Keep in mind that all window film "low-e" films are winter low-e films.

You see, the radiation from the sun is about half near infra-red (NIR). This infrared carries half of the solar heat. Whenever near infrared strikes objects inside a home, it gets converted into far infra-red (FIR). It is a very similar effect to the greenhouse effect- near infrared getting converted to far infrared.

So in a cold climate, this is the ideal scenario: a window or window film lets in NIR (half the solar heat) so the house can warm up (since most months are cooler). When that NIR strikes objects in the home, it gets converted to far infrared and is re-emitted (that is why warm objects appear on an infrared camera). Of course, in a cold climate you want to keep the far infrared in, so that is where the low emissivity coating comes in. The coating is specifically designed to block far infrared so that it stays inside, keeping the house warm. (Incidentally, far infrared is also what is emitted by heaters, so you also want to keep that in). Therefore a low-e window is like a one-way gate: it lets in some solar heat, but also does an even better job keeping it from going back outside

So the low-e films that I am familiar with, CPFilms, etc, are primarily sold in Northern climates where the role they perform makes the most sense. The problem with filming homes with these in hot climates is that infrared radiation doesn't know what season is. It will also effectively keep far infrared (ambient heat) in your home in the summer just as well as it keeps heat in during the winter. Sure, the overall effect will be better than no film if the TSER is high enough, but a non-low-e film would be better. Personally, I don't understand why anyone sells low-e films in hot climates, it is in my opinion a technically inferior choice to the strightforward high TSER films.

Note that there are glass manufacturers that sell summer low-e glazings, meaning they block the NIR and transmit far IR (plus they can get much higher performing emissivity values). However to my knowledge no film manufacturer has a summer low-e coating, they are all winter low-e coatings, ideal for cool climates but non-ideal for hot climates.

To the original question: dual pane window can be filmed safely with low absorption films, as others have pointed out. However, dual pane windows with a low-e coating on surface 3 are higher risk and require lower absorption still. You will find that the "magical solar absorption" that is safe to install on a window will just happen to correlate exactly to the exact absorption of the film your manufacturer would like you to install on the window. The truth is- the lower the better, even 25% absorption has slightly more risk. Anything above 40% has some risk, and personally I would never film anything with absorption 50% or more, since that is just dangerous.

Is this the same as with Low-E windows as well ?

Absolutely this applies to windows, and the effect is more pronounced with squared and cubed coatings. However, summer low-e coatings exist for hot cliamtes.

A "summer low-E" coating is good for double pane windows in a hot and sunny climate, because they block near infrared. The thign is, no window film can do this- all "low-e" fims are winter low-e that are not good for hot climates. For films, in hot climates it is best to stick to high TSER.

If a manufacturer did ever manage to design a good "summer low-e" film, it would be a breakthrough product. In fact, the best possible window film combo for mid range climates would be an insulated glass unit, with an outside weatherable summer low-e film, and a winter low-e film on the inside. I am not even sure the film manufacturers could make a summer low-e coating, though.

Climate aside... Low E is very unstable... look at the warranty. Don't sell it unless you absolutely have too.