Tinted i.g. units

I know that the general rule of thumb on tinting an i.g. is not to exceed 50% absorbtion. What about on a factory bronze tinted i.g. half temp., half annealed. The factory tinting is on the temp. side , and it is outside.

go for it....but i use a 48% absorptance as the limit.

So you are applying film to the annealed side? It is always good to consider your glass dimensions, altitude, max temperature, glass condition, and very importantly whether or not you have shadowing.

In the case of exterior tempered/ interior annealed, the tempered is not counted because it is exterior and film will not be applied to it.

oh no wait....let's get technical shall we. too many variables to consider to answer your question...

what's the air space gap? 1/4, 1/2, 5/8? is it air, argon, or krypton?
who's the glass manufacturer?
what's the pane thickness? exterior and interior?
what's the seal condition?
what's the framing system? aluminum/steel tubular or solid, rubber gasket, wood sash, concrete?
what's the altitude? above or below 5000ft.
what are the average summer and winter temperatures?
is there an indoor shading treatment? drapes, blinds?
if so are the treatments light or dark?
what's the distance of the treatments from the window?
is the area ventilated?
what's the outdoor shading like on the window?
what direction does the window face? N, S, E, W?

Hey, your learning. Those are most of the questions that you will find on a F2G chart which is the little chart that you need to makes sure your parameters fall into so that you can have your THERMAL BREAKAGE WARRANTY HONORED BY YOUR MFG.

Dude, if you've been tinting flat glass for all of those 19 years, then you would know well enough to be asking these kinds of questions. Especially at altitude and in cold climates with huge temperature swings but I think you know that already Bill Nye...

i'm glad i'm finally learning.

you must have had a ton of windows break in your career to be so damn worried all the time.

No I follow the F2G guidlines so my thermal break warranties are all valid. I wouldn't want to put my customers in a situation to where they think they have a warranty but then the MFG bails because I didn't follow directions...

I probably have fewer breaks than you and I am installing 5-6,000ft higher than you are, in this climate you have to be worried.

you think i don't follow the charts either? i haven't been doing it this long by slackin' on jobs or misleading customers.

1/2 gap -1 inch unit
coastal glass, charleston, sc
both panes are 1/4
no glazing tape
bronze framing, rubber gasket
below 5000 feet
sum. 90 / win 45
mini blinds, screwed to bronze frame roughly 1.5" from glass / light in color
climate controlled
no shading
faces west

I was told by a SG supplier that you can usually get away with tinting a tempered unit dark. I ve got just two windows 50X70 to do.

I tinted a few tempered 1"trapezoid I.G. windows in a pizza shop several years ago with SG True Grey 6, at the owners request. I bet him they would not last based on the rule of thumb. I did not get my free pizza! They are still there and look good, facing south west, 1/4 shade due to awning.

So I can't ask anyone in this forum additional questions or give them another opinion in order to help out without catching flack from you?

okay then...you're right, i'm wrong. are we done now?

and dont flatter yourself by thinking my 'flack' was aimed directly at you

Go look back at the top of this thread. Who shot who?

actually we posted at basically the same time i started replying before you had responded. just good timing on my part

Thanks, this is what I was looking for, I wasn't sure if you still go as high as 50% on surface four, with the first pane tinted. Most people around here dont apply film to tinted I.G.

Your right Blade , sometimes people are to worried.

I had 7 broken windows in 20 years( and 3 times the window was alrady bad before applying the film) and apply all reflective films
on flat and donot look at the kind of glass.

We have plenty of degree variations in a short periode.

Don't worry to much