Positive side waterproofing prevents damp problems at its source whereas negative side waterproofing is a remedial solution only. Positive side waterproofing is applied to the outside surface of a building or structure – usually to the external walls. Positive side waterproofing is also applied to the walls of showers, bathrooms, kitchens and laundries to prevent moisture penetration into adjoining rooms and cupboards. In these instances, they are the wet side of the wall. Positive side waterproofing protects against, amongst others, corrosive soils which can attack masonry and concrete and even steel reinforcing. Water seepage as a result of a high water table, rain and even garden sprinklers is also prevented. In all new construction, positive side waterproofing must form an integral part of the building specification in order to ensure a problem free structure.