You can install a retractable awning with a wind sensor to automatically close.

You can use a sun sail for far less money but it's either up for down.

After screwing down the boards, consider an indoor outdoor rug instead of fake turf. First, you wouldn't find turf on a deck and it holds water too long after it rains.

Assume that's a townhouse with an HOA? Check the rules first before doing anything. Several houses ago, we lived in one where you couldn't even add an awning without a pile of HOA permissions.

I’m no pro but could the nails be: Poorly installed? Wrong size perhaps? Could the deck be too heavy?

We put fake grass on our pool deck 3 yrs ago loved it and are now in the process of doing all the reest of our 2200 sq ft of deck the same I seems to be great the one we ordered has drain holes every 5 " so the deck does not stay wet , it feels grea on your feet and around the pool a lot cooler than the deck was . Yes you will need to make sure the deck surface does not have popping up nails .As for shade I would look at a retractable awning since the deck is not very big .

Patricia, what is the brand of your fa ke grass, please?

Patricia won't put a fake plant inside the house but has no reservations about fake turf outside. Go figure.