Typhoon Proof Roof Design

A round or multiple sided home is more resistant to hurricane strength winds.

Typhoon proof roof design.

This can be illustrated in the diagram below from the whole building design guide organisation. For example you might find that the roofs in hurricane prone areas are multi sloped. The pressures above show the upward wind pressure on the 3 main types of roof. Probably the most important part of a hurricane house is a reinforced roof.

A cat 5 hurricane proof log house is resistant to the winds up to 245 mph. A gable end roof is generally cheaper to build but less wind resistant than a hip style roof. Hip roofs with four slopes will perform better than gabled roofs with only two slopes. Hurricane resistant houses should use stronger plywood.

The breakaway theory has therefore become less applicable to shed. Hurricane hugo has proven the strength of the shed roof. The round design allows the wind to blow around the home. It s more expensive but much more resistant to blown debris.

That is to say that conceptually the shed roof would be blown away and the main roof would stay intact. 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. Design guidelines for hurricane resistant buildings. In the design of the hurricane resistant home the length of these overhangs should be limited to 20 inches.

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