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FYI: LowE 366 has strong green tinge / tint / cast

5 years ago

I'm posting this because when I was looking up this topic pre-window replacement I didn't find very many unambiguous opinions. Perception of glass tint is somewhat subjective and also relative to the angle of the light, brightness, etc. so it's understandable that opinions vary. Some people care and others do not whether there is a strong cast. Maybe there's variation in manufacturing years. But as far as my new windows with Cardinal LowE 366 glass manufactured in 2020, this is my experience.


IMO, Low E 3 glass is very green. Looks green from outside, casts a green pall on the rooms inside, looks green when you simply look at the windows in anything other than bright sunlight. Even my husband, who hardly can ever see variations in color and usually doesn't care, is unhappy with how it makes everything inside seem green. He said, "sickly." When I snap a cell phone picture of the kids inside I have to color correct the green cast. I even look green in Zoom calls, LOL. It's been three months since install and I still dislike it.


We have an addition on the house where we replaced the window sashes in 2016 with what is supposed to be the same type of glass but a different window manufacturer (yes, I did all the calls to see if the glass is the same exact type from Cardinal and I was told that it is). We've compared the sashes side by side and the cast is a lot stronger on the newly installed windows. Company rep for new windows insists it looks the way it's supposed to. Maybe we got lucky in 2016. I wanted the great UV filtration rating of the 366 but I now feel it wasn't worth it.


If you are currently making glass decisions for a window project hopefully this will help. Be smarter than I was and order glass samples from your window company or see if they have some and look at them at home before finalizing your project. Reading specs online for days didn't prepare me for what I got in real life (online researchers, you know who you are!).


Picture is taken of a window in a corner because it's the easiest spot to demonstrate, but the effect is the same throughout. (Please excuse the dire need to power wash the siding! I just wanted to write this post now while I'm thinking about it, to-do list be damned.)


Comments (20)

  • 5 years ago
    last modified: 5 years ago

    I hate that greenish cast too but the two contractors I'm talking to are like, that's all you can get in Texas is the 366 by Cardinal. I'm asking others too how can I get better VT (even if greenish) and they're telling me, that's not possible or worse, not what I want because I want the 366. So I'm caught in this deadend discussion about the glass and cannot even progress to picking the window. I would love if some contractors or other knowledgeable people would chime in on this topic.

  • 5 years ago

    Be smarter than I was and order glass samples from your window company or see if they have some and look at them at home before finalizing your project.

    Good tip!

  • PRO
    5 years ago

    Low-e 366 is way less "Greenish" and dark than the Guardian equivalent in my examination of the comparative solar control offerings.

  • 5 years ago

    Same here. I just had Milgard fiberglass windows installed and the house is darker and greener inside. The bedroom with a porch over the window now needs a light on during the day, just to find my way in.

    I hate it. It makes my view outdoors look gloomy, even on a sunny day. I only need it on one window but have to get it on all. I hate it.

  • PRO
    5 years ago

    Where is the home located? There are different ranges of Low-e and you can get them with more or less tint in them. You just need to have a window contractor that knows what they are talking about.

  • 3 years ago

    Window on Washington what are the different ranges of Low-e and tint I can get on Milgard Windows that won’t appear green from the outside?

  • PRO
    3 years ago

    There are some Low iron options and Low-e 272 will have less hue to it than Low-e 366.


    https://www.cardinalcorp.com/technology/reference/loe-performance-stats/

  • 3 years ago

    Thank you so much! But do you know if this will be available through Milgard?

  • 3 years ago

    You would need to ask Milgard if this info is not available on their website. Milgard is not offered at all any longer on the east coast.

  • 3 years ago

    Milgard SunCoatMax is LoE-366 while their SunCoat is LoE-270. You want to make sure that your windows will be coming with SunCoat and not SunCoatMax if you are concerned about green tint in the glass.


  • 3 years ago

    When I was researching Low-e glass last year, I found that if I selected very energy efficient windows (vinyl it fiberglass casements with argon gas), I would be able to meet Florida's strict energy code (SHFC .25 or greater) with Low-e 270 glass.

    That said, I chickened out at the last minute when the window company wanted me to initial every page of the contract that I agreed to low-e 270 glass and got 366 glass. Also, I was worried that my exterior door glass would look different than my windows.

    So far, I don't regret it, but I went with black exterior windows and will not install white window treatments, which I think make the green more prominent.

  • 3 years ago
    last modified: 3 years ago

    By far the majority of people never even notice the slight tint in the glass and are completely happy with their windows, but clearly there are also folks who are very unhappy with it, so it pays to research and to know the possibilities up front before ordering.

  • PRO
    2 years ago
    last modified: 2 years ago

    @Mia Smyth


    Recent commentary from another poster: https://www.replacement-windows.com/windowbb/viewtopic.php?t=1555

    • I actually have both the Sun Coat and now the Sun Coat Max. All my windows face South and West and the sun is very strong. I live in CA. The 2 sliding glass doors I purchased about 4 years ago have just the Sun Coat. Its terrible I continually find myself closing the black out drapes. The room is hot and very cold at night. I am happy that I ordered the same Milgard Thermally Improved windows for my entire home with the Sun Coat Max. We have not had them installed yet although I did place the window in the living room on the floor and can tell I will not have to keep closing the drapes and hopefully will not need window coverings at all. I can definitely see the difference. I hear they make a room more comfortable and I can see why.
  • 2 years ago

    I just ordered Marvin windows with no Low E coating at all. Couldn’t bare brand ordering windows with a green tint. I get it they help with the temperature in the house, but I don’t care. I want clear windows. They survived for centuries with clear glass and so will I. AC will help :P saying that, I totally understand if someone cares more about energy efficiency than looks.

  • 2 years ago
    last modified: 2 years ago

    Mia Smyth,

    I highly doubt the salesman was trying to push anything on you based on some sort of profit motive. A company really doesnt make any more of a profit on glass upgrades since it also costs them more. i would bet he or she thought that particulat glass was the best option for your home. The tint is minimal but tint can be subjective obviously.

  • 2 years ago

    " I just ordered Marvin windows with no Low E coating at all. "


    Code requires it Assume you had no permits pulled? a.gbhw

  • PRO
    2 years ago

    I have heard some horror stories about code enforcement in California.

  • 3 months ago

    I too am disgusted with the green tint. We installed Marvin windows in our new house and I couldn't figure out why all my paint colors were turning green and why the rooms seemed darker. I thought it was the landscaping (green trees) reflecting in, until I removed the windows to stain them. I was suprised, it is like looking through green sunglasses. Every wall looks mustard green, it's gross. I am so disappointed. Had I known I would have figured something else out. We have 58 windows and the whole house is green. I would rather have warm sun coming in.

  • PRO
    3 months ago

    What glass coating was specified in this case and what climate/area of the country are you in?


    This thread goes a bit deeper over here.


    https://www.houzz.com/discussions/2637495/does-low-e-have-to-tinted-glass#n=171 


    If you are anywhere in a heating degree day (i.e. area where you have more days with the heat on than AC on) climate and you got a window with Low-e 366, your window supplier, architect, or GC probably specified the wrong glass range.

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