Renner Tarp

So it's been like this ever since right after I trimmed the tree tops, but here are the pictures of the tarp that I've had over the rooftop deck to prevent the rain from continue to pour through 3 floors of the building.

I started by putting up eye screws and attaching it to the top of the wall under the overhang.

Then the goal was for the water to just go over the edge of the other side, but I've learned over multiple attempts to keep the tarp in place that simple throwing it over the edge doesn't work (as pictured)

The problem this approach is that the wind will blow the extra tarp that's hanging down from the deck back up onto the rest of the tarp. Once it's sitting on top of the tarp that is over top of the deck it'll add weight, especially once it rains, that will cause it to sag and collect the rain in the middle of the tarp instead of having it run off the side. The key I've learned is to keep the tarp taught and also to have the water run over the edge.

What I found works is to keep the extra tarp inside the balcony and use a board to keep the overhead cover part of the tarp taught. You have to make sure that the edge of the tarp that sits on the ledge is just barely over the edge, and use bricks/weights to make sure the board doesn't slide backwards and loosen. I'll try to post a picture of it, but even this method it's full proof. It can take lighter rains and wind but whenever there is a larger downpour the extra weight of all that water on the tarp at once pulls the board off the ledge. Keeping a constant eye on it is all I've been doing.