It is determined by the space allotted for the net(s). Allow at least 12 inches from any wall or fence for barriers or tunnel walls, and always check your neighborhood restrictions.
It adds longevity - This treatment will add to the life to of the net. It highly recommended for hot, sunny areas as well as for the icy, bitter cold of Northern states.
This is answered by how the net(s) are being installed. Feel free to contact us with questions concerning this matter.
This is a personal preference. The door is convenient for entry. The door consists of a 6ft high slit with a panel of netting over the slit.