That scenario is going to hold all the snow...and it will be hard to knock off as the holes are small.The first 1/2” netting is to keep the other birds and smaller creatures out. The second plastic fencing layer Is to make it more difficult to rip open the first layer and add stability to the netting. My proposed third layer will be wire poultry netting.
Mine run roof is 2x4 welded wire, most snow goes right thru,
but if the snow starts to stick and pile up it definitely sags and has to be knocked off.