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Picture of P250UA5
posted
In my quest for heat mgmt in the house, exacerbated by the crazy heat we've had this summer.
We have a few windows that get extended sun exposure & are noticeably warmer throughout parts of the day.
1 is the front door, mostly in late afternoon, it's triple pane 'stained glass like' pane, but more of a sandwich & not a gapped/insulated type glass.
The other 2-3 are regular windows, double pane, don't see a brand/model. Mfr code MTL-12.

Have read against using films on double pane glass & also that it's ok if the heat absorption rating is under 50%

The front door is the biggest heat intrusion, as it's in direct sun in the late afternoon. The others are morning exposure or have decent shade, but are all on the western side of the house.




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Posts: 16415 | Location: Spring, TX | Registered: July 11, 2011Reply With QuoteReport This Post
Not really from Vienna
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I have a good friend who worked in a glass shop for over 20 years. He told me that, based on his observations, it was a very bad idea to use UV reducing tinted film on double pane windows/sliding glass doors. I trust his judgment enough to have followed his advice.
 
Posts: 27307 | Location: SW of Hovey, Texas | Registered: January 30, 2007Reply With QuoteReport This Post
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Thanks, may just do the front door, as it's the biggest 'offender'




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Posts: 16415 | Location: Spring, TX | Registered: July 11, 2011Reply With QuoteReport This Post
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My vehicle window tint guy did a half round window in our bedroom. He said there is different tint for residential windows. Im not sure if mine is UV blocking as I was looking for light blocking.


 
Posts: 5499 | Location: Pittsburgh, PA, USA | Registered: February 27, 2001Reply With QuoteReport This Post
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My understanding is that UV doesn’t matter but you don’t want IR blocking on the inside of the inner pane on double panned windows as that may cause the glass to crack or seals to leak. Too much heat builds up in the between panes.

If you want IR blocking, get the inside of the outer pane coated.




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Posts: 13343 | Location: In the gilded cage | Registered: December 09, 2007Reply With QuoteReport This Post
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^^^^^^^ This. I was told the same thing many years back when I was looking to tint the sought facing windows of my house.




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Posts: 5822 | Location: Colorado | Registered: April 20, 2009Reply With QuoteReport This Post
Shall Not Be Infringed
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quote:
Originally posted by konata88:
My understanding is that UV doesn’t matter but you don’t want IR blocking on the inside of the inner pane on double panned windows as that may cause the glass to crack or seals to leak. Too much heat builds up in the between panes.

If you want IR blocking, get the inside of the outer pane coated.

Exactly how would one get the 'inside of the outer pane' coated on a sealed double pane window? I can't imagine that's even possible unless done at the time of manufacture. Otherwise it would certainly void any warranty, as well result in the loss of any argon gas contained withing the panes if the windows had that feature.


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Posts: 9789 | Location: New Hampshire | Registered: October 29, 2011Reply With QuoteReport This Post
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No clue. Smile

I have cheap contractor double paned windows I guess. When I had to replace a pane, a guy came out, unhung the window, disassembled the frame, replaced the pane, reassembled the frame and then re-hung the window. I guess I don't have anything fancy between panes. I could have applied a film before the second pane was installed I guess.

But in general, perhaps it needs to purchased the way you want it?




"Wrong does not cease to be wrong because the majority share in it." L.Tolstoy
"A government is just a body of people, usually, notably, ungoverned." Shepherd Book
 
Posts: 13343 | Location: In the gilded cage | Registered: December 09, 2007Reply With QuoteReport This Post
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UV/Heat Blocking- Safe for double-pane windows?


Google says: Link

Tinting Double Pane Windows

If you have double pane windows (also called dual pane windows, insulated windows) you have to be careful which films you use. This article will explain why you must be concerned and which films you can use. Always be careful with double pane windows! They are one of most common forms of glass breakage.

If you’re looking to get started right away, these films are safe when tinting double pane windows Link to Films . Also, all the products on the right are safe on double pane windows!

Caution With Double Pane Windows
Double pane windows are just that: two panes of glass that are sealed with a space in between, usually filled with a gas. These windows are beneficial for heat insulation, but adding window film to them can alter the solar properties and potentially damage the glass.

All films absorb a certain percentage of heat. If this added heat absorption gets trapped in between the two panes of glass, it can cause the seal to break, or even worse, the glass to shatter.

Choosing Film for Double Pane Windows
The biggest factor here is heat absorption. As a general rule, any film that has a Solar Heat Absorption rating of 50% or greater is NOT safe on dual pane glass. Be sure to double check this rating on any film you use if you are tinting insulated glass.

Most Common Film Types for Double Pane Windows
Realistically, most common films are tested safe for double windows. These films are the most common ones you will find that are NOT safe:

Natural 20% VLT
Bronze 20% VLT
Blackout Film
In addition, it is never recommended that you use any automotive film on dual-pane windows, even if the heat absorption is less than 50%.

Generally, any other film type will be safe, including all Dual-Reflective films, Silver films, and Frost films. Any retailer or installer will have films that are not safe clearly labeled, so just be sure and ask if you are not sure.
 
Posts: 24798 | Location: Gunshine State | Registered: November 07, 2008Reply With QuoteReport This Post
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^ That was similar to what I'd read, but I'm always a bit cautious on a quick Google result.

Think I'll just start with the front door, which is just a triple pane sandwich [2 smooth panes with a 'leaded' mosaic-like/stained glass center].

The 1 double pane I would want to do is in our master closet, which was an add-on to the house at some point in the prior owners' remodel. Thinking it's just not as insulated as the main house. No attic access to it, so I don't really know the insulation status of that room, nor in the walls.




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Posts: 16415 | Location: Spring, TX | Registered: July 11, 2011Reply With QuoteReport This Post
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I'm not sure how and if it relates.

But I've seen some guys with Tesla Model 3s that will put on Ceramic Tint on the roof to block the heat in places like AZ & TX. I've seen a few that have reported cracked glass. Assuming from the heat reflected back to the glass.

Probably irrelevant and a totally different angle than household windows.




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Posts: 8981 | Location: Woodstock, GA | Registered: August 04, 2005Reply With QuoteReport This Post
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quote:
Originally posted by nhracecraft:
quote:
Originally posted by konata88:
My understanding is that UV doesn’t matter but you don’t want IR blocking on the inside of the inner pane on double panned windows as that may cause the glass to crack or seals to leak. Too much heat builds up in the between panes.

If you want IR blocking, get the inside of the outer pane coated.


Exactly how would one get the 'inside of the outer pane' coated on a sealed double pane window? I can't imagine that's even possible unless done at the time of manufacture. Otherwise it would certainly void any warranty, as well result in the loss of any argon gas contained withing the panes if the windows had that feature.

You can do it on Pella windows.

The other option is to apply the tint to the outside of the outer pane




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Posts: 14311 | Location: northern california | Registered: February 07, 2003Reply With QuoteReport This Post
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