You have to make sure that the tarps are of very high quality in order to ensure that the lumber is well protected. For this, you need to find out the constituents of the lumber tarp. A tarp of good quality is made up of polyethylene. But nowadays even mesh is used. A tarp is a heavy-duty material but in terms of weight, it is as light as a canvas. While scouting to buy a tarp in bulk, make sure that the ones which you buy are broad enough to cover the lumber completely. This will protect it not only from the sun and rain but also from the dangerous UV or ultra-violet rays and effects of snow. The tarps are available in cases of two or three. These lumber tarps can cover truck beds which can be as long as 48 feet. One can imagine the strength and durability of these tarps when it can sustain a load of 8 feet high pile up on the trucks. The price of a single tarp ranges from $300 to $400 and the sets come in the range of $850 and above. All the tarps have three rows of D-Rings and eyelets on the hemlines.