Water resistance or proofing is an important factor in
health and comfort of building occupants. Several texts on
concrete construction describe the methods for achieving water
proofing. The term waterproof describes concrete and masonary is
completely impervious to water and water vapour, whether or not
the water is under pressure. Water proof construction implies
the use of a membrane or a film that provides a barrier and
covers all surface pores or capillaries. The term water
repellent describes concrete or masonary that repells water
without significantly reduced permeability of the structure to
the passage of water vapour.

Water resistance or proofing is an important factor in
health and comfort of building occupants. Several texts on
concrete construction describe the methods for achieving water
proofing. The term waterproof describes concrete and masonary is
completely impervious to water and water vapour, whether or not
the water is under pressure. Water proof construction implies
the use of a membrane or a film that provides a barrier and
covers all surface pores or capillaries. The term water
repellent describes concrete or masonary that repells water
without significantly reduced permeability of the structure to
the passage of water vapour.