Wood- framed windows have been used on buildings for centuries. The main types of wood used for this purpose are either softwood or hardwood. Hardwood comes from trees whose leaves fall off in season. They are not necessarily hard and some are even softer than some softwood types. Softwood on the other hand, never lose their leaves. They are not always soft as the name suggests, as some are known to be much harder than some hardwood types. For the most part, however, hardwood is stronger than softwood. The reasons why Hardwood windows last longer than softwood windows are as follows;
The oil contained in hardwood makes it difficult for it to decay. This is because oil prevents water from entering the wood. Softwoods decay easily when they come into contact with water because they do not have such oils.
Softwoods are easily attacked by insects. The oil in hardwood repels such insects. Although some hardwood types can be attacked by insects, a coat of protective oil is sufficient to keep them safe. Their ability to hold paint makes it easy to coat them. Softwood on the other hand does not hold paint well and several coats must be applied.
Hardwoods have a high density and are oily; therefore, they do not chip easily. Softwoods, on the contrary, have a lower a density which makes it easier for them to break into bits. The material used to join them together or to other surfaces is not held firmly enough. This has the effect of causing them to chip when they have to be made tight severally.
Softwood cracks easily because the elements cause it to shrink and swell periodically. The elements do not affect hardwood which is usually compact and highly resistant to changing weather patterns.
An excellent type of hardwood to use on windows is Teak. Teak that is not oiled can last for a minimum of twenty years and a maximum of forty years. When oiled at least once a year, they can last for over a century. It is not necessary to cover Teak during winter. Untreated softwood lasts only a few years. When treated with wood stain, they can last a minimum of fifteen years and a maximum of twenty years. Painting softwood can cause it to decay when the absorbed moisture does not dry.
The cost of softwood can be even five times less than that of hardwood. It is, however, worthwhile to invest in hardwood as they last longer than softwood. They are well able to withstand different weather patterns as opposed to soft wood which is affected by weather changes.
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