I buy a new tarp every couple of years when the farm and ranch store has their 1/2 price sale. I just think covering the roof/AC that way will prevent water from entering the interior on a flat roof TT if we get a heavy year of snow. It has plenty of ventilation. My friend invested in a total cover top and sides and in 3 months the wind had destroyed it. This is the cheaper alternative and so far it works well.
2011 Jayflight 23FB G2
2003 Chevy 1500 4x4
Wife Peggy and 2 Beagles and a rescue Cocker Spaniel
2007 Yamaha Grizzly 400 ATV and Yamaha 2000 watt Genny
Me/retired insurance claims and DW/retired RN.
"If the women don't find you handsome, they should at least find you handy."-Red Green