House roof styles often vary depending on the climate. Roof building has developed to build an appropriate home roof for the location’s climate. Pitch, ventilation, and other factors are often considered when designing roof plans.

Structures in zones where hurricanes or typhoons occur regularly tend to have a roof design meant to withstand wind better. A home roof in a snowy climate is designed to bear the weight of snow, and to shed it. Dust, insects, rain, and other climatic conditions all factor into house roof styles and roofing materials for each home roof.

Roof Design and Home Roof Pitch

The pitch of a roof varies with climatic conditions, which determine the best angle at which to build a roof. For example, in very snowy climates, and particularly in mountains, roof plans with a higher pitch allow snow to slide off a roof. Hotter, drier climates, however, won’t require a home roof with a steep pitch. House roof styles in temperate climates will vary somewhere in between, depending on how close they are positioned to warmer or cooler climates. The amount of rainfall also determines the pitch of a home roof; higher rainfall areas need at least some pitch to deal with the rainwater drainage.

Home Roof Design and Ventilation

Ventilation is an important factor in the design of any home roof. Attics were actually invented to provide this much needed ventilation. House roof styles with proper roof ventilation will help prevent ice dams in colder climates, along with the resultant leaks. In warmer climates, ventilation helps a home roof to expel hot air that has been heated by the sun to keep the building cooler inside.

There are two types of unvented roof plans, dependent upon the climatic shift from cold or warm climates. The goal of these two unvented house roof styles is to keep the roof deck dry. Rigid insulation is installed above the home roof deck to control surface temperatures, and keep water from condensing on the deck.

In areas that have temperatures of at least 45 degrees Fahrenheit for most of the year, roof design will have fewer problems with condensation. Areas where temperatures go regularly below 45 degrees Fahrenheit need house roof styles with much thicker insulation to keep the roof deck dry during winter months. During these months, heat from the house can melt ice or snow on the roof.

Roof Design and Climatic Considerations

There are a number of details that should be considered in any roof design:

• Insect control: Termites and other destructive insects can infiltrate the roof, especially in warmer climates. You can reduce the chance of this happening by chemically treating wood and ensuring that rain runs off the roof and away from the structure.
• Insulation: Home roof insulation reduces heat loss and condensation in colder climates.
• Preventing ice dams: The pitch of a home roof, properly sealing where the roof and wall meet, and having a water protection eave can help prevent ice dams and leaks. Ice dams can form on even the best roof design, however.