Forum Discussion
rgatijnet1
Sep 25, 2013Explorer III
harold1946 wrote:
There are no R ratings for sun shade material, I would think you would be aware of that. They are rated as to the percentage of sunlight being blocked up to 100%.
Shade fabric is not made to reflect anything, it reduces or blocks the penetration of sunlight depending on the percentage desired, along with reducing the amount of heat being transferred due to radiation.
I have used Reflectix as insulation for many years for diferent things, but putting it on all the glass must make it very much like being inside a submarine. If that is to your liking, go for it. But if you would like to reduce the heat penetration and also see out, shade material mounted on the exterior is the answer.
Since the OP was talking about the front area of his coach, I directed my response to only those windows. I also did not see where he was interested in seeing out. I have awnings on all of my exterior windows but not on the windshield. For that reason I have more than enough light in my coach and only need to block the heat coming through the windshield, which I do by using the reflective foil.
Yes, I am aware that there are no R ratings for sunshades material because it is not an insulation. From experience I also know that the sunshades that lay on/attach to the exterior windshield will get from warm to hot, depending on the color. The "Prompt Sunscreens" that a poster mentioned above, come in Beige, gray, black, and brown. On a sunny day, they keep out most of the UV rays but they will get from warm to HOT. I am also aware that the heat on the sunshade material will transfer to the glass which means the heat will come in to the coach because it is not insulated. If the sunshade material does not block out 100% of the sunshine, then it allows some heat through it which will come in to the coach. If you can see through it, the sun can shine through it, and the heat will come through it.
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