I don't know where you got your information but isn't true. Windows can add a little weight depending on door construction but not anywhere near double in almost all cases.
John
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Sheesh. Ok mr. Passive aggressive, [emoji33]I got my information from 2 garage door companies, my buddy who installs and the information from the pamphlet on my door the guy at HD and Menards both gave me. They all said the same thing, windows will add 20% weight to the door.
I said it was my 2 cents worth and like I said, the only reason windows would matter was if you were going to buy a cheap opener! Yes I know that they have counter springs, but it makes the whole system work harder... And I should have mentioned this before, is panel sag when the door is opened. The wider the door, the more glass, the great the panel will sag over the years. Just physics my guru friend, just physics.
And yes, windows weigh about 5lbs each, adds 20+ pounds to the door panel...effectively DOUBLING, the weight of the PANEL. [emoji38] And the door panel is reduced by about only 5 lbs from material removal. So, a standard 10x8 door weighs 90 lbs, add 20 lbs for standard windows, subtract the 5lbs material removed and net weight for the PANEL goes from 18 to 33 lbs, an 83.33% increase and you've increased the weight of the door by 16.67%...[emoji51][emoji38] I'm sure they were figuring a round up of 17% up to 20%
Now I'm no garage door expert, didn't claim to be, but felt my information at least helped. But then again, I'm not a "garage door guru" and clearly you are per your information page. So, have at it. I defer all comments to you. [emoji79]. I will henceforth refrain from further interjection.
Lmao, PSA...
Happy new year