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Most homeowners consider singles or insulation as the major parts of a roof. One of the most overlooked inside layer that is hidden away is the roof sheathing. This underlying layer of the roof is very critical to the proper functioning and the lifespan of a roof. The roof sheathing is the layers of plywood or wooden planks installed beneath the shingles or rafters. There are two types of roof sheathing – open and closed. The kind of sheathing depends on whether there is space in between the boards. Open sheathing installation is the cheaper of the two, but closed sheathing is usually the most effective. The sheathing layer again has a thickness ranging from one to five inches. The thickness considered is based on the weight, height and the effectiveness of the material.   Continue reading →