In the short term probably yes if it is white carpet.
In the long probably way more problems than it's worth:
- Wet carpet will add a lot of weight up high where you don't want it.
- It will likely breed mold and mildew.
- It likely won't stay white for long and as soon as it turns a dark color, I suspect, the cooling advantages will turn against it.
- It will make roof sealing much more difficult in the future.
Now if you could build a frame with some sort of tarp a few inches above the roof, you might have a winner but even that comes with complications:
- You would almost have to have some sort of roller mechanism to stow it for travel.
- How would it pass over the A/C, antenna and other items on the roof without conflicting.
Reality is, it's probably more trouble than it's worth for the small amount of energy savings. If your A/C is having trouble cooling, probably easier to find a shaddy site.
Tammy & Mike
Ford F250 V10
2021 Gray Wolf
Gemini Catamaran 34'
Full Time spliting time between boat and RV