Patio Umbrella shades the patio, which includes court yards, open yards, terraces and verandas. It is protecting open spaces from hot sun and rains, so as to use it as eating place, meeting area and amusement location.
Beauty of the place improves with Patio umbrella and its visual effect is magnificent. The patio umbrellas are extensively used in restaurants, way side cafes, swimming pools, houses and beaches.
Shade, shape, design and size of different models of patio umbrellas vary very much. Demand is more for rectangular, circular, hexagonal and octagonal. People mostly prefer the shape that suits the site. Some customers go for shapes complementing their furniture. Patio umbrellas are coming out in lot of floral designs and shades.
Patio umbrellas of two different types are mainly used. They are called the standard and the cantilever umbrella. The standard type is supported on a central pole. The central pole is mounted on a base kept at the centre of the covered area.
The cantilever has no central pole. The support of the cantilever umbrella, is supported on an offset base which is kept aside. The space under the cantilever type will be more because of the offset base. The cantilever can be kept against the evening sun with the help of auto tilt mechanism, which can be operated by a hand crank.
Patio umbrellas erected in the open and has to resists all kinds of weather. It will also be affected by strong winds. The patio umbrellas are therefore made durable, with good quality materials to make it resistant to severe weather conditions. The main parts of an umbrella are pole, rib or frame and cover fabric.
Pole of patio umbrella, the main part to take load, will be usually of stainless steel and sometimes aluminium or wood. Cast stone, plastic or wood is used for making the base of the umbrella.
The frame or the rib of patio umbrella is very important, as it is this member that holds the fabric tightly in position and that strengthen the umbrella structure. This is made up of many stainless steel bars joined at the centre, with each other. To make handling of umbrella easier, it is made lighter by providing aluminium or chromium frame for the patio umbrella.
The most weathered part of a patio umbrella is its cover fabric. This has to resist all weather conditions. This is therefore made of all weather resistant synthetic materials, of very high quality. The fabric will be given a U-V coating against sun\’s radiation. Fabrics of the patio umbrella will be one that can endure alternately, both rain and sun.
The temperature underneath a patio umbrella is reduced by 30 degrees, by using certain type of fabrics. Polyester fabrics are usually used for canopy umbrellas. Dark fabrics are known to resist U-V radiation better than lighter fabrics.
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