Why Are Most Roofs Dark

Although these dark spots and ugly black streaks on your roof may look like dirt mildew soot or mold what they really are is algae.

Why are most roofs dark.

The most common type is known as gloeocapsa magma also known as blue green algae. Ask a roofing specialist to evaluate your roof and recommend solutions. You probably know from elementary science that different colors respond differently to light and heat energy. What are those ugly black streaks on my roof.

If keeping heat out is your game however a dark roof color will work against you. Dark roofs are great at absorbing heat which is super handy if you live in a cold winter climate and your primary goal is to keep heat in during the colder months of the year. Dark roofs may have a small snow melt effect but not a sizeable one. And the dark roof effect is the least effective where it is most needed.

The length of the sunlit day diminishes greatly during the part of the year when heating requirements are high and by. Here are some points to consider. The roof covers a huge portion of the exterior of your house and receives most of the direct sun rays. Because a roof is the primary barrier between the sun and the interior of a house it s reasonable to wonder how different styles and colors of roofing affect the amount of heat that is absorbed into the home.

Brighter or lighter colors tend to reflect away not just light rays but. Similarly if your roof experiences winter problems like ice dams your roof color probably isn t the primary culprit.