Re: using tarp under tent in winter necessary?

I figure that a tarp made of this, the stuff Kifaru uses in their tipi liners WOULD shield a high dollar tent from UV rays and thus save replacement costs. My old Early Winters Light Dimension tent, the first commercial backpacking product made of Gore-Tex was a deep yellow when I bought it in 1977 and faded nearly cream colour when I pitched it a couple years ago; the floor was gone and it looked pretty sad, but, I was kinda emotional when I threw it out.

I spent many nights in that tent and it faded due to hard use and UV, so, I want to preserve the highend tents I have just bought and this is a way that I think will work. can't hurt to try, anyway.