When working with contractors, or roofing specialists, it may help to be familiar with the terminology. For example, did you know the rafters of your house support a plywood base called a foundation deck, or sheeting, of your roof? Tar paper or underlayment, is attached over the deck and helps protect your roof from possible moisture damage. A thin layer of metal known as flashing is used to prevent water from entering the joints on your roof. Eves extend out over the edge of your home and to help improve drainage. A flat board attached to the eves, or fascia, holds the guttering. Not all roofs have the same slope, or pitch, which is the elevation of the roof that helps determine the best roofing material for your home. Shingles cover your underlayment and represent the exterior of the roof. If your roof is flat, you may need a built-up roof of tar and gravel layers. Before installing the first layer a waterproof membrane, or plastic liner, may need to be laid over the roof. Seams of the liner are sealed and covered with granules or gravel to protect the roof. Your contractor should answer any questions regarding the terminology for the job. For more information on roofing terminology, contact a roofing specialist.
