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Yew is a softwood. The Yew is a conifer, and softwoods come from coniferous trees, while hardwoods come primarily from deciduous trees.
Heartwood is wood that has died & become more resistant to decay as a result of deposition of chemical substances.
Depending on what type of wood chairs you have, they may or may not need to be treated. For example, Teak is resistant to decay and incest infestation. Other woods like pine must be treated with a preservative to prevent decay.
jiquinoun Cuban timber tree with hard wood very resistant to moisture
The ark of the covenant was made of acacia wood. This type of wood was known for being durable and resistant to decay, making it a suitable material for constructing sacred objects like the ark.
Cellulose.
The disadvantages of Ash wood is that it is not as rot proof or water resistant as other hard woods. If it is left untreated, it will rot quickly.
The best wood for a deck is generally considered to be oak. This is a very durable and resistant wood that, when treated properly, can last for many years.
A varnish or lacquer would do the trick, though nothing actually makes wood scratch proof just scratch resistant
Wood is biologically degradable.
There are about 40 different types of elm. It is a good solid wood, dense and water resistant. Elm wood was valued for its interlocking grain, and consequent resistance to splitting, with significant uses in wheels, chair seats and coffins. The density of the wood varies due to differences between species, but averages around 560kg per cubic meter. The wood is also resistant to decay when permanently wet, and hollowed trunks were widely used as water pipes during the medieval period in Europe.
Cedar wood is naturally more weather resistant than maple. Cedar wood will darken and mold over time if left untreated, but it is more insect resistant and more resiliant than maple for exterior use.