Wilmington Roofing: Article About Insulation
Insulation performs many important functions for a home and especially for its roof. By insulating an attic, homeowners get the benefits of lower heating and air conditioning costs, improved indoor comfort and a longer lasting roofing system. Although not all types of insulation are created equal, they all perform these important jobs. Before having an experienced Wilmington roofing service install rooftop and attic insulation, homeowners should consider the material's resistance to fire as this can have critical effects on the home's safety.
The fire resistance rating of insulation refers to its ability to resist becoming inflamed. This property is dependent upon the materials that make up the insulation as well as how closely packed it is and whether it is topped off with another material like drywall or gypsum boards. The fire rating should be considered when choosing the type of insulation because a more resistant material can give a family more time to escape a home. A high level of resistance can also help stop the spread of flames should the attic or rooftop catch fire.
Rolled fiberglass insulation has the lowest fire rating and should not be used in spaces where the temperature could exceed 212 degrees Fahrenheit. Poorly ventilated attics that sit beneath a black asphalt shingle roof could potentially get this hot or close to it during the heat of summertime.
The experts at The Roof Maker of Wilmington roofing companies can assist you with any questions regarding metal roofing or flat membrane roofing.
Because of this, property owners might want to limit their use of fiberglass rolls to the walls, basement or crawl space of the house.
Moderately fire resistant forms of insulation include glass wool, mineral wool, treated spray foam, treated loose fill and cellulose fibers that have been impregnated with fireproof chemicals. These materials resist temperatures ranging from 1,200 to 2,200 degrees Fahrenheit.
The most fire resistant type of insulation is based on silicates. Older homes are the most likely to have this form of insulation because it often contains asbestos fibers. The natural resistance of asbestos to fire made it ideal for homes that used wood stoves or fireplaces as these devices were prone to setting houses on fire. This kind of insulation was also common in urban environments as homes built closely together could easily ignite one another. Insulation containing asbestos is no longer available for purchase or installation. If roofers discover it while repairing a roof or checking the attic's R value, they may refer the homeowner to an environmental testing service to confirm the presence of asbestos. The existing insulation can be left in place and encapsulated or covered with new insulation.