Some kinds of materials do not cause sensitivity, and are best used wherever possible. Ceramic tiles, glass, marble, stone, rock, gravel, sand, brick, plaster and plasterboard do not cause reactions. If you have a very heavy exposure to them, you may get irritation, and you may exceptionally become sensitive to the dusts, but not to the material once in place. If you work in the building trade, and have constant exposure, then sensitivity is known but it is still rare.
Cements are made by heating limestone and clay, which are then ground with gypsum. Portland cement is the main cement used in construction. It is mixed with sand and gravel to form concrete, and with sand to form mortar. Cements are also used as adhesives. Cements, concrete and mortar do not cause sensitivity, but they can burn on contact and need to be handled carefully. Chrome salts from the earth’s crust – chromates – contaminate cement accidentally during manufacture and these are known to cause allergy to building workers who handle cements extensively.
Metals very rarely cause allergy and sensitivity when used as building materials.
Wood and cork rarely cause sensitivity. If you think you react to them, the cause is more likely to be varnishes or lacquers covering the surfaces than the material itself. See Varnishes (below) for more detail.
Water-based materials are generally much less troublesome than solvent-based ones. Many alternatives are now available and they are often equal or better in performance to solvent-based products. Product choices are given below.
Some toxic materials do not cause any problems if handled with care. Unless they give out fumes or are solvent-based, they will not cause sensitivity. For some building uses, toxic materials can be the only solution to decay, collapse or reconstruction. They are proposed below only where their use is essential.
Some synthetic materials, such as plastic pipes, window frames, covings or polystyrene tiles, will not cause sensitivity unless they are very new, or unless they get heated and then give off fumes. Virtually all chemically sensitive people can tolerate aired-off plastics used in these situations.
Take Care With Natural Chemicals
Some building and decorating materials are now available which are based on natural chemicals, such as natural turpentine, rosin, vinegar, plant and vegetable oils, and linseed oil. Some of these are natural organic solvents and are known to cause sensitivity as their vapours are given off. Some people tolerate these better than synthetic organic solvents, but other people react to them. Take care with natural chemicals until you are sure how you react to them.
Turpentine and rosin cross-react with a number of chemicals and should be treated with care. Linseed oil evaporates fast and is generally trouble free.
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