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Cracked glass
Follow up: Attached is the performance data for Johnson's Resi/Comm window films and if you look to the bottom you'll see DN50 has a solar absorption of 39%, which is well below the threshold of concern which is generally accepted as 50% absorption (with no shadow). With a straight line shading from the roof this does increase the risk, which is usually low for straight line shading compared to other types. I've also attached a pdf of Johnson's film-to-glass chart which is used to determine how safe a film is. The thicker the glass the higher the risk; you say 6mm tempered and 4mm is the cracked one (interior pane). The question now is what compass direction do these panels face? In the end, I'll just suggest you hook back up with the person that installed it and get his input. He had to have been comfortable suggesting that film. I still believe it's a one off cracked panel and the rest will be fine. It takes 2 seasonal cycles to know for sure. Truly your call as to whether or not to replace with something lighter such as DN60. Here's more helpful info that helps you question the glass type on the interior; is it plate or is it heat-strengthened (HS). I believe it is plate and not tempered or HS. Why? Plate glass with suffer thermal shock if the edge temperature is different than the center of the glass by 50 degrees F. Heat strengthened requires 100 degree F difference, and Tempered requires 200 degree F difference. Ryker chimed in and that stimulated further review. Good Luck with this. johnsonFilmToGlass_2021.pdf- 1
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Cracked glass
Whatever that glass is that cracked it is NOT tempered. DN 50 is pretty high solar absorption and your saying shadows too so you probably need a more reflective film.- 1
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Cracked glass
Hey, thank you for taking the time to reply. It's greatly appreciated! -
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Automotive Tint Comparison
1) Why avoid Suntek? I thought they resolved that issued with the easy scratching and that they are one of the market leaders in Australia? Also, it seems most of the well established Tint businesses use Suntek 2) I've heard mixed things about Rayno, with some installers raving about it and others disparaging it. Makes it difficult for the consumer to know the truth, given vested interests exist. 3) Is Ultragard a Australian exclusive product? The IP seems to be owned by GTS FILMS PTY LTD. How's the quality as it seems to have limited installers. 4) Is the MEP Films CNP that apparently are Manufactured by LLumar of the same quality as the LLumar tints (such as Llumar Formula One Stratos; Llumar Formula One Pinnacle; Llumar CTX)? 5) -
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Cracked glass
The crack indicates thermal stress, however, the edge of the glass may have an imperfection (bur or clam shell chip). The crack does run 90 degrees out from the edge and curves as it follows any weaknesses in the pane itself. I have attached a pictured of what tempered glass looks like when it breaks and alongside it what a plate (or float) and heat-strengthened glass looks like when it breaks. The outer panel my be tempered should indicate so by a stamp etched on the glass surface in one corner. It should indicate tempered. Plate glass has no indicators, however, heat-strengthened glass will crack in the same manner as plate glass. I'm an unsure whether heat-strengthened glass requires a stamp. Tempered glass is 4 times stronger than plate and heat-strengthened is 2 times stronger than plate. 1 in 24 is indicative of edge imperfection. I could not find the solar absorption rate of DN 50, but if it is similar to competitive films, there should be no issue with that installation setting (including a straight line shadow). This, too, points back to edge imperfection as the cause. And finally, I spy drapes in a close position, correct? If so, it would be helpful to crack open during sun exposure; this to assist in allowing trapped heat between the glass and drapes to dissipate.- 2
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Cracked glass
Hello. I recently installed Johnson Daylight Natural DN 50 on a couple of windows. Solar energy rejection is 39%. The windows are double pane and the glass is supposed to be tempered 4mm + tempered 6mm. The roof overhang shades the top 1/3 - 1/2 of the windows. However, a few days after installation I noticed that one of the glass has cracked, presumably due to thermal stress. Should I remove the film from the rest of the windows? I installed the film on 24 of these windows (6 tiny houses) so now 1 out of 24 is broken. Or is it more likely that I just got unlucky and the glass had a defect? Is shading from the roof overhang such a big factor? The glass cracked. Is it really tempered? I thought tempered glass would shatter, but not crack. Thanks! -
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Residential Window Tint - Suntek SYDS vs. Solar Gard Slate vs. Madico Optivision
Did you get this taken care of? What were the results and are you pleased? -
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Residential Film without blue hue?
Take a look at 3M's Nightvision or LLumar's Dual Reflective series, they both have a warm tone to them. -
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Automotive Tint Comparison
Steer clear of Black Armour, Suntek, ASWF. The others are good choices if you are in Australia. Check out the reviews of the installer too. It’s not just the materials that have to be proper. Never go for the cheapest!!! -
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Residential Film without blue hue?
Hey guys I am in the process of having window film installed in my home but have a question about which brand I should go with. Hoping yall can help me out. I have a room that faces a busy street and as a result my blinds pretty much always stay closed. I love having natural daylight but not so much people being able to see what i'm doing in my room/all my expensive equipment. I used to work in the window film industry as a helper/installer/salesman when I was in highschool and we did a lot residential/commercial work. The specific brand of film we used always left a certain blue and cool appearance. Is there any brand of residential film that does not have this effect? I mainly just cannot stand having blue light amplified and am looking for a film that has a neutral shade to it or even a warm/yellow hue. I have single pane windows and I do not necessarily care about heat rejection but if I have to pay more for a ceramic film rather than a dual reflective or a standard film I am willing to if that helps solve the issue. Again, any help is really appreciated with this there are so many new window film brands out there and it really is cool to see how far the industry has come.
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