Energy Efficient Roofs

The basic components of a roofing system include the roof covering (shingles, tile, slate, or metal), sheathing, roof structure, flashing and drainage.

Cool Roofs: Reflective Roofing Materials

When replacing your roof, consider using cool roof materials. Roofing materials that reflect the sun's energy will help keep the indoor temperature down, reducing the heat load and requirements of your cooling system in the warmer months. Reflective or light colored roofing materials are particularly recommended in hot and humid environments.

Cool roof materials take advantage of the reflective properties of light colored materials. Dark materials absorb the energy from the sun and transfer this heat into your home. If your home has dark shingles, you may be running your air conditioner more than necessary, consuming extra energy and paying higher utility bills.

According to the Florida Solar Energy Center, a white ceramic tile or white metal roof is best. They typically last for 30-40 years compared to the 15 years, typical of asphalt roofs. White reflective roofs may lower attic temperatures by up to 30 degrees F, therefore reducing the requirements of your cooling system greatly. Cool roofs also tend to be more durable than conventional roofing materials, extending the lifetime of your roof.

Consider This

A few of the most important factors to consider when replacing your roof are the material, insulation below, ventilation, and drainage. It is recommended to contact a professional who is familiar with roofing systems as well as any local codes, to help determine the type of roofing materials most suitable for your needs.

Drainage: Your Gutter System

The purpose of gutter systems is to collect rainwater from the roof and drain it away from the building and foundation, preventing moisture problems and ensuring greater durability. The picture to right shows gutters plugged with debris and serving as planters.

Improper drainage may lead to water damage to the foundation, when the water is let drain straight down rather than being diverted away from the structure. Various problems that may arise due to a gutter system not functioning properly include freezing, damage to the soffits, discoloring of siding materials, soil erosion and problems with the foundation and basement.

The general guide to follow is to have the gutters sloped a minimum of 1 inch for every 40 feet of run. Gutters will be sized according to the roof drain area and should be evaluated by a professional.

Seeking the Help of a Trained Professional

Keep in mind that this Advisor provides general information on energy efficient remodeling. There are many projects you may be able to complete to improve your home. However, some projects may be too complex or dangerous for the untrained person to perform. It may be necessary to bring in a certified energy auditor or other specialized contractors. Multifamily rehabilitation projects in particular may require the help of a trained professional. ENERGY STAR provides information for Finding a Professional Energy Efficiency Contractor.