For areas that experience high winds, insist on reinforced double hems designed to withstand hurricane-force winds. Thick, rigid panels provide greater wind resistance, withstand dents and lie flatter and straighter against the wall. Typical finishes are smooth, woodgrain or cedar grain. Profile refers to the specific design and exposure size of a panel. Typical profiles are clapboard, Dutch Lap, beaded, vertical, and shakes and scallops.
Projection affects panel performance, rigidity, and shadow line .
High temperature fusion and postformulation are manufacturing methods that produce stronger panels. Measurement of how well a panel can be expected to perform in high wind areas. Positive windload tests are not a true measure of windload pressure. Avoid siding with a gray backing. Also avoid low quality fillers which can cause color fade and chalking.