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Old 07-02-2015, 10:44 AM   #1
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Window Film State Laws

I have seen several recent discussions on multi forums regarding window tinting and ran across this site that has every State's and even Canada's laws. It appears to me that any Motorhome would be a MPV in the charts and in some states have specs different than for automobiles usually allowing darker tint.

I am a little confused on the term "ASI" pertaining to windshields. I assume it is referring to line of sight and pertains to the tint you can place above that, which is particularly important in the high windshields of class A's. What are other's interpretation of the ASI meaning and how would you measure that if only ASI is specified on your state's chart? The only reason I could see not using max tint above your normal line of sight across the top windshield would be the ability to see a traffic light if you were very close to it.

Comments or clarifications appreciated as I am getting ready to tint my Class A.

Automotive Window Film State Law Charts - International Window Film Association | IWFA.com
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Old 07-02-2015, 12:42 PM   #2
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Most traffic stops happen when folks have heavy tint on driver's side windows that prevent observation of the driver. Tint that is applied on the windshield should not impair vision of the driver's view. Putting it across the top of windshield to prevent sun glare is fine, just not down into the vision line of the driver. In an RV, I'd think those two ideas should allow you to drive worry free. If you put it on the driver's side window, leave a portion uncovered that allows a person walking up the side of the vehicle to see the driver clearly. You probably don't need tint all the way to the bottom of the window to remove sun glare anyway.
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Old 07-02-2015, 01:51 PM   #3
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If you look at the windshield from the inside on the side you will find a horizontal line labeled ASI, that is the ASI they are referring to. Above that is where you can tint the front glass.
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Old 07-03-2015, 12:30 PM   #4
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ASI is I think the American Standards Institute.. One of the outfits that sets standards for things.

But then I am guessing at that.
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Old 07-03-2015, 02:22 PM   #5
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ASI might be AS1. AS1 refers to the clarity of the glass. #1 is used for windshields. It's interesting that we see this on almost every windshield, but a Google search shows no single, clear explanation of it's meaning. Many references to it being the lower limit on the windshield for tinting, but I don't find any 'official' explanation of that. Searching for American Standard turns up the bathroom fixtures company.

ASI and AS1 seem to be used, according to this document, AS1 is the proper marking for glass that meets specific testing. (pg 23) Pg 24 says the line above the AS1 mark is the limit of tinting. Note: This is only a draft document.

AS is the mark from the American National Standards Institute

ANSI-American National Standards Institute
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Old 07-04-2015, 04:31 AM   #6
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Quote:
Originally Posted by PepaGlen View Post
If you look at the windshield from the inside on the side you will find a horizontal line labeled ASI, that is the ASI they are referring to. Above that is where you can tint the front glass.
Thanks, I found this line on each side of the windshield center post. It appears to read AS1 (one) not ASI but could be either. It coincides with the top position of the windshield wipers and the bottom of the factory tint on my Coach. The factory tint does little and I am going to add darker tint across the top. I have a 12 to 14 inch high fixed window above each side slider windows and going to tint that to match the upper windshield tint and undecided on the cockpit side windows. From previous experience I know you have to be careful of tinting the cockpit slide glass where it impedes your vision at night, particularly the glass that you view your mirrors through. In addition adding tint to the side sliders behind the screen makes it hard to see out of them even in the day.

I am going to tint the rest of the windows with whatever the installer suggests to have day time privacy with good exterior view with the shades up but try to add max protection for solar heat and UV protection whatever that happy medium is. Tinting previous coaches made a very noticeable difference in cooling the coach down and kept them cooler and the interior protected if stored out side.

Scott
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