Hi, We've recently had built a retaining wall 5ft H x 59ft L to level off our garden. 400 standard breeze blocks used, double wall, and have back filled using broken up concrete from old patio, lots of rock and shingle, and then top soil with newly laid turf. We've noticed that there arent alot of weep holes in the wall, which made me wonder if there is a set to guide many should be in it and at what heights considering the length of the wall. Any guidance is very much appreciated! Thanks