If you are talking about using a tarp when storing your pop-up, when yes. We always put a trap over our pop-up when storing the trailer. Using a trap helps cut down on sun rot, water damage and fading. The canvas on our pop-up (which I gave to my son) is over ten years old and still in great shape.
Have fun camping.
2014 Heartland Wildness 2775RB, 2015 Ram 2500 4x4 Mega Cab