San Antonio Roofing: Article About Roofing That Keeps Houses Cool
During the summer, outdoor temperatures will affect indoor temperatures unless expensive air conditioning is run to counteract the radiation of heat into the home. The number one area where heat enters a house is through its roof. San Antonio roofing contractors understand the need for energy efficient roofing that makes it more affordable to keep cool in the hot, dry climate of south central Texas.
Any form of roofing will block out at least some heat, but some materials accomplish this better than others. Cool roofs are those that reflect a relatively high percentage of the sun's light and heat, sometimes as high as two thirds of it. The poorest heat fighting roofing, by contrast, may only shield the house from a sixth of the heat that strikes its surface.
Higher quality asphalt will keep things cooler than low grade asphalt. Redwood or cedar will generally outperform asphalt in this regard. Metal roofs with reflective coatings tend to do even better and are a major answer to the heat island effect. Heat islands, like San Antonio, can be as much as two to five degrees hotter than the surrounding countryside.
Have a question regarding residential roofing or insulation? Please ask a roofing expert from Tony's roofing of San Antonio TX.
Many modern, thermoplastic roofs, such as TPO and PVC, have low emissivity and so do not radiate heat downwards to any great degree. They also are often light colored to promote reflectivity. While energy efficient roofing costs a bit more, it often more than pays for itself by lasting longer and lowering energy usage. Furthermore, a high Energy Star rating can sometimes gain tax credits from local governments.
Another factor is insulation. A fully insulated attic, whether using loose or rolled insulators, will block much of the heat attempting to come down from the roof. Allowing attic heat to escape into the atmosphere through a system of vents and fans is also a major factor in cooling a house.
A final option to consider is that of a radiant heat barrier. These barriers are installed below the roof decking and operate on the principle of heat reflectivity. A large portion of the heat that radiates downwards will be jettisoned back up and away from the building.
By combining several features that tend toward cooling a building's interior, a home owner can greatly reduce the costs of home cooling. The hot Texas sun will always shower the landscape with an overabundance of summer heat. There are ways, however, of minimizing the effects of this heat barrage.