I secured my tarps on my hoop house using long narrow strips of wood on both sides. Drilling holes in the wood first makes them easy to secure to the hardware cloth. (using wire,screws,bolts or tie ties) A tight fitting tarp that doesn't shift lasts longer (don't use the grommets on the sides)
My favorite tarps are heavy duty 12 ml white poly tarps made by expose.I've had one on my hoop coop almost 4 years (still holding up good but has algae growing on it) Some dead branches fell on my other one and punctured it