Originally Posted by ENFORCER
Just tint the front windows. It should cost you around $100.
Got them tinted today in carbon black 3M, cost $190.
Whilst at the tinters I asked if they had a device to measure UV transmission, they did. They bought out a meter that measured from 0 to 1999 uW/cm2, the measured variable was UV A + B as stated on the device.
When my tint was finished we took some measurements:
1. Ambient light for a nice sunny perth day was off the scale, so assume 1999.
2. The drivers window measured 22 uW/cm2.
3. The windshield measured 18, we were surprised and remeasured in multiple sections but the readings were consistent. the windshield faced the sun.
4. The factory tinted glass measured 180 to 190 and this was consistent on all the glass facing the sun, eg, passenger doors opened towards sun.
The tinter reckoned that the windshield was laminated and had a section of clear film or some such in the middle. The results for the factory glass gels with what someone on the forum got from Jeep USA in that its about a 90% UV reduction.
The tinter said not to confuse the UV reduction with heat reduction as the factory glass may not have similar thermal reduction qualities as tint film does. I recall that from the Jeep USA response they stated 40% for IR reduction, I think.
Overall I will see how it goes as we enter summer, but if heat build up is an issue I will look to tint the factory glass to reduce it.
It is good to know however that the UV protection is adequate on the factory tinted glass and so far there is no compelling reason to apply clear tint, although that may change.