this is a water molecule and there are billions in a glass of water
This is a water molecule H2o

Water is a universal solvent which influences building defects/dampness due to salt movement. 

Different materials in a building can absorb water at high humidity and release it at times of low humidity. The amount of hygroscopic moisture which a material can hold is variable, but salts increase moisture retention.  It is why building professionals discuss the ability of a buildings ability to buffer moisture.

It is unique in the earth’s climate as it occurs in three forms: 

1. Vapour.

2. Liquid.

3. Solid (ice, snow).

H2o is the name given to a water molecule, which is only 0.275 nanometres in size, and billions of them are needed to create a droplet.

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