Typhoon Proof Roof Design

The pressures above show the upward wind pressure on the 3 main types of roof.

Typhoon proof roof design.

Hip roofs with four slopes will perform better than gabled roofs with only two slopes. In the design of the hurricane resistant home the length of these overhangs should be limited to 20 inches. A cat 5 hurricane proof log house is resistant to the winds up to 245 mph. A round or multiple sided home is more resistant to hurricane strength winds.

Wall logs in such construction have to be made of circular reference glued laminated timber and all other components of the house have to be hurricane resistant. For example you might find that the roofs in hurricane prone areas are multi sloped. Design guidelines for hurricane resistant buildings. The round design allows the wind to blow around the home.

This can be illustrated in the diagram below from the whole building design guide organisation. Hurricane hugo has proven the strength of the shed roof. A gable end roof is generally cheaper to build but less wind resistant than a hip style roof. It s more expensive but much more resistant to blown debris.

Many shed roofs of traditional design have survived the storm. Probably the most important part of a hurricane house is a reinforced roof. The outer siding of your home also needs to be an approved hurricane resistant material. Hurricane resistant houses should use stronger plywood.

Roof overhangs are subject to wind uplift forces which could trigger a roof failure.