Deck planks cupping upward!
My deck contractor did pretty a good job renovating our 20' x 40' deck two years ago, but didn't read the growth rings right when he screwed down the 2x6 redwood planks. They're cupping upward so rain water puddles on about a third of them. Can and should I flip them? Is it too late? The screws are uniformly installed, but I doubt the flipped screw holes to line up with the original holes.