What is roofing? Roofing is the covering of a structure, consisting of all structures and materials needed to support it on top of poles, beams, or on high uprights, giving protection from the elements, especially rain, wind, sunlight, and extreme temperatures. A roof is often a part of the outside building envelope, attached to the outside walls with rafters and spans. The roof also carries the attic ventilation system and air-conditioning ducts. These components are then covered with sheet rock to provide a protective barrier against the elements.
The basic components of a roof are tile, shingles, a protective sheath, a layer of fire-proof material, and protective coverings such as what is roofing felt, tar paper, rubber, or other materials. Each layer has its own purpose and functions. For example, the tile serves as a water-resistant membrane between the interior and exterior walls. The shingles provide the insulation that allows the roof to breathe and keep the temperature constant inside. And the fire-proof layer serves as a barrier against intruders and to reduce the growth of mold and mildew.
All layers are intended to work together in a way that allows the roof to maintain its integrity while providing adequate protection. However, there are some issues that may cause damage or require repairs. One such issue is where the roof leaks, usually in the valleys, between the shingles. If this area is not sealed well, the moisture will seep into the ceiling cavity below, causing further damage. This is why it is important to work with a home inspector or architect and have them inspect your roof for problems that may need repair.
There are several different types of roof, including metal roofs, ceramic tiles, and felt/asphalt roofing. With felt or clay tiles, one layer is typically composed of three to five sheets of felt glued together under an asphalt veneer layer. If the felt does not touch the asphalt, the veneer cannot be applied. The thickness of felt will also affect how long it can be used before requiring repair. When deciding on which roofing type is best for you, be sure to learn about the differences between all of these options so you can choose the right one.
One of the most important aspects of any roofing system is the sheathing. A layer of felt or tar required to strengthen the roof’s integrity is referred to as the sheathing. Generally, a single sheath is comprised of one to two sheets of felt glued to each other. The felt is then baked at high temperatures to make it stiff and impervious to moisture. After the sheathing layer is installed, a final layer of flashing is added to protect the sheathing, as well as to provide a barrier against wind and moisture.
After the sheathing layer has been installed, the next step is to select the roofing underlayment. There are numerous brands of roofing underlayment available in home improvement stores and online. This product will provide a level of protection and stability for your roof, that many felt layers do not provide. Proper installation of a quality roofing underlayment will increase the lifetime of your roof, even during heavy windy conditions.