Capillary Action

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This occurs when two surfaces are parallel with each other, for example external wall cladding where water

runs from the top surface and can be drawn underneath, creep back and penetrate any untreated areas of timber,

causing further problems such as wood rot or blisters.

Also, when moisture is absorbed into a porous material from floor level upwards.

Often referred to as rising damp due to faulty damp proofing.

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