Apex overlap sheds are our most popular type as they are cost-effective, pleasantly rustic in appearance and available in a wide range of sizes. The term apex refers to the roof, which has a traditional pointed shape with two sections meeting at a ridge in the middle. Overlap walls are so called because they are made up of overlapping wooden boards which are designed to let rainwater run off easily. This style is easy to maintain, as individual boards can be replaced if any become damaged.