When you stack your timbers, at your place, after you have sealed the ends, make sure you have a good foundation or support for the pile. Make them as level front to back and left to right as you can. Put support blocks every two feet on center and place your separator blocks (as least 2"x2") in-between each row of timbers. Stack timbers of same sizes in each row.
Place your sticker blocks (2x2) in each row directly over the support blocks on the bottom, keeping them all aligned vertically, so that all the weight of the pile is well supported.
After you have placed the top row of timbers, place another row of stickers blocks on and then some other lumber or timber cover, such as a sheet of plywood. Angle this cover sheet so that the rain will shed off the cover. Keep the sides and ends of the pile open so that some air will flow threw. Air flow will prevent the chance of moist air build up which could help mold to form.
Good luck with your project.
Jim
