Melamine foam has an R value of about 3.5 per inch of thickness. Closed cell sprayed in foam is R7 per inch. If you don't mind spraying some glue to stick it down, Polydamp PLE has an even better R value than sprayed foam. https://www.polytechinc.com/products/thermal-insulation-foam Melamine can pi...

The problem will be, and I state again. How much do you want to spend on possibly improving the cooling? Any of this stuff will work as far as insulation. But it's not cheap, it may not be enough, and you will need a lot, just for the roof alone. https://www.amazon.com/Self-Adhesive-Heat-Shield/s?k...

As stated we use it, and should mention are happy with it. It visually appears to be nearly identical to the secondskinaudio stuff Tim posted. Not sure if the thickness of the two are the same though The Hushmat, Dynamat, and seconskinaudio product all appear very similar. I am sure there are other...

We use HushMat here in the cars we install AC in. No spray, it is self adherent. Easy to apply. Cut pieces to shape to be able to tightly cover entire roof. Since re-heating has not been considered until just now with Bohica's post, feel both heater hoses in the engine compartment. One should be co...

Dynamat is not a great insulator, and pretty costly. I have sprayed closed cell foam on the underside of vehicle roofs with great results. But you have to be very careful to prep the vehicle, because the overspray sticks to everything - forever. Al alternative is mixing glass micro balloons with a ...

We use HushMat here in the cars we install AC in. No spray, it is self adherent. Easy to apply. Cut pieces to shape to be able to tightly cover entire roof. Since re-heating has not been considered until just now with Bohica's post, feel both heater hoses in the engine compartment. One should be co...

Wow. 5 full minutes at max load. That is hitting it hard. Good news is a pressure ratio below 3:1 even with that beat down. I am going to say the fan clutch is hanging in there as well. I am going to say your refrigeration loop is in pretty good shape, based on pressures. A "muggy" feel, ...

No one is trying to mock your attempts to find the solution. However, you do have to be realistic about what the system can handle. Therefore, you posted some relevant information in this last post. 114, sounds like Phx temps. No roof insulation that's going to kill performance in this type of heat...

So i removed Freon and vacuumed down the system for roughly 40 mins and held vacuum . I recharged the system as close as possible to 68oz . I did the 1500 rpm test for 5 mins temperature outside was 114 degrees the vent temp was 80 degrees . the low side was 61psi and the high side was at 340 psi du...