If you are choosing parquet it will be useful to know that some wood essences contain natural substances that are harmful to human health. These essences, if used extensively at home, they can have a certain influence on the quality of the indoor air.
Obviously, the processors along the entire supply chain also run risks, so it's good to know which ones wood essences it comes and take the necessary precautions.
Wood essences which can emit natural allergenic substances: ebony, iroko, mahogany, obeche, opepe, sequoia.
Wood essences which can emit volatile substances irritating to the respiratory tract: green heart, red cedar.
Wood essences which can emit volatile substances irritating to the skin and mucous membranes: Indian citrine, mansonia, maroké, African mahogany, Indian and Brazilian rosewood, dalbergia, rummy, satinwood west India, teak.
Having said that, one should not be wary of wood which is the oldest and most natural of building materials. Just be careful of a few things, such as the content of potentially harmful natural substances (see above) and where they come from.
In the choice of wood essences those attributable to wood from primary forests must certainly be avoided: the primary forest is the result of thousands of years of evolution and its existence is closely linked to that of the planet, it is a crime to attack it.
But beware: many wood essences tropical woods are fast growing and can come from sustainably managed non-primary forest plantations or forests, so tropical wood is not always to be banned. Rather precise guarantees (such as the FSC Forest Stewardship Council certification) on the origin and type of cultivation must be requested.
In the absence of reliable information, it is advisable not to use tropical woods, especially when it comes to teak, akatio, iroko, meranti, mahogany and obeche. Another thing not to be overlooked is the risk for them essences to be more exposed to pesticide treatments required by long shipments.
The wood essences and woods from European forests give better guarantees of good forest management, but this also applies to hardwoods from United States controlled management forests such as oaks (Red and White Oak), Tupil Wood, maples ( Hard and Soft Maple), American cherry (Cherry), ash (Ash) and walnut (Walnut).