Outdoor cover options?

I am looking for a reasonable cover option to protect my 14 foot cataraft outside mainly during the summer months. I live in western Colorado where the sun bakes which is mainly what i wish to protect against as i plan to store tubes inside for the winter months. My harbor freight heavy duty tarp only lasted a few months and am wondering what others do. I am considering a car port but am wondering what others use or have come up with. Is a car cover a good option? Thanks in advance

Sent...

Outdoor cover options?