If you re in a very cold climate your roof if probably covered by reflective white snow for most of the winter regardless.
Why use a white roof.
Switching to a white roof can actually reduce energy use by about 20 percent in hot sunny weather according to the lawrence berkeley national laboratory heat island.
If however you have a slanted roof or have never worked on a rooftop before you may want to consider contracting the help of a professional painter.
Department of energy there is widespread belief that white reflective roofing systems even on buildings in northern cities like new york and chicago are more efficient and more cost effective than dark roofing and that these systems also reduce global warming and the heat island effect in which dark colored building materials raise the ambient temperature in urban areas by a few degrees in summer.
Generally white in color or with white surfacing these membranes reduce the solar radiation collected by roofing surfaces which lowers the roof surface contribution to the energy used to condition air and to the local environment.
In addition to keeping your cooling costs down while improving the comfort of your home a white roof will also help prevent problems associated with excessive heat.
Unlike a black roof a white roof will not absorb any heat.
Unlike green roofs which can require considerable infrastructure to support and maintain cool roofs can be achieved with a painted on coating to an already existing roof.
White roofs are better for your heating bill and the planet.
Rainwater that falls on a white roof however absorbs no heat.
While white reflects.
First find a good paint.
In fact white is a reflective surface which means it will do the exact opposite it will reflect the sun s rays thereby helping to keep the heat outside of your home.
Painting your roof white can be as easy as painting any surface.