Glass

[LateApex]

May I ask "What UV / IR layer is installed in kit windshield and hatch cover?" Anything at all? Nothing is visible to the naked eye. Looking at coatings ...

[Rsnake]

Mine came with nothing and I added a 35% ceramic tint to the hatch and. 75% ceramic to the windshield.
That hatch is a perfect greenhouse for growing marijuana, I have been told��

[LateApex]

I have been told that most of today's laminar auto glass has an integrated layer that blocks most UV and IR. Tint is really only needed for a privacy screen (with consequent visibility side effects). Excepting a visor strip to help with sunrise / sunset ...

I am guessing that this is not the case with the glass that comes with the kits - Certainly can feel the heat (IR) through the back hatch on the coupe ...

[JohnK]

Many manufacturers now offer noise and thermally insulated glass, either as an option or as standard equipment on new cars. My new daily driver offered this an an option, and I spec'ed it. It does help to cut down noise tremendously and may offer some amount of UV protection but honestly the heat rejection is minimal. I added XPEL nano ceramic window tint to all the windows - 35% on side and rear and 75% on the windshield, and it made a MASSIVE difference on cutting down heat. I'm going to go out on a limb and say that the glass that FFR provides is nowhere near as good as the glass that OEM's offer as upgraded glass options, so the benefit of a good window film will be even more pronounced in your case. FWIW - 75% on the windshield is barely noticeable. If I don't tell people it's on there, they don't know. No issues with visibility at night, but the difference in cabin heat is remarkable.