Basic Components of a Residential Roof
A homeowner must always have a good idea about every aspect of his house, at least having a better understanding about the basics, as the knowledge gained can be helpful during discussions with contractors when it comes to major repairs or additional improvements in the home.
Once a homeowner has a firm grasp of the basic components and structures, he is able to find ways to choose the right materials for his home parts, like for example with the roofing system, knowing about the basic parts may help him decide what better roof materials should be selected. The roof structure is made up of three basic components – underlayment, flashing, and shingles or tiles.
Once the roof structure is in-place, an underlayment is directly applied over it, which is a material that is waterproof and functions as a protector of the roof structure from the harsh weather condition. Roofing underlayment comes in three main types and each type is designed to highly protect the roofing structure from all kinds of weather conditions and they are: the conventional asphalt felt paper or also called tar paper, which is actually made up of a high percentage of asphalt or bitumen, polyester and cellulose; the synthetic type is basically still of asphalt but with a mixture of fibreglass to provide more resistance from tear and make the underlayment stable; and the rubberized asphalt underlayment that consists of a greater percent of asphalt and rubber polymer, designed with a special back that acts as a waterproof seal between the underlayment and the roof deck.
In the roof structure, there are certain areas in it that can be susceptible to water leaks and this is the reason why roof flashing is introduced as a sealer between the roof joints to prevent water leaking through the roof. There are different kinds of roof flashing materials to choose from, but the most common is the galvanized sheet metal, while aluminium and copper comes in a close second choice. There are many ways of installing roof flashing according to the areas on the roof deck, such as step flashing around the sides of the roof, chimney flashing, and saddle flashing around the top, but the measure used in installing roof flashing is by soldering.
Shingles or tiles are the outermost part of the roofing system which covers the underlayment and are the ones that are subject to the different kinds of weather condition, that is why their materials range from concrete, metal, or a good kind of wood, asphalt, clay, rubber, slate. Roof shingles are usually designed as either flat or curved tiles that interlock or overlap with each other so that water is unable to penetrate through it and there a wide array of choices depending on the cost, weight, durability, color and style.