I searched for years to find the solution but even Google didn't have it. So I experimented and found the foolproof method that I will share only here at GSN.
Another great tool to have is a woodpecker to pierce rows of tiny holes in the covering over which you're gonna put another layer. I've used this quite a bit and it really helps buy letting the air go thru instead of getting trapped between the layers.
Just as soon as something is foolproof, we find bigger fools.Lord knows we can all use foolproof solutions!!!