CP 102:1973

Gives methods of preventing entry of ground and surface water into the building from surrounding areas. Section 2 describes methods of prevention at or below ground floor level, section 3 deals with methods of providing damp-proofing of walls and floors at ground level by use of d.p.c. materials to BS 743.

This Code deals with the methods of preventing the entry of ground water and surface water into a building from the surrounding areas. It makes recommendations for the drainage of adjoining areas, for special waterproof or water-resisting types of construction below ground level and for the damp-proofing of walls and floors at or near ground level.

It has been assumed that the design of all constructional work within the scope of this Code will be carried out by an architect and/or engineer experienced in the type of construction concerned and referred to throughout this Code as the designer.

Section 2 of this Code describes methods of preventing the entry of ground water into a building at or below ground level where ground or surface water may not be able to escape immediately.

Section 3 of this Code describes methods of providing damp-proofing of walls and floors at or near ground level.

In Section 2 two types of structure are considered:

1. Type A in which protection is provided by a continuous impervious membrane which excludes visible penetration of water and provides a vapour seal.

2. Type B in which visible penetration of water is prevented, but transmission in the form of vapour may not be wholly excluded. For the purposes of this Code, this degree of protection is assumed to be provided by high quality reinforced or prestressed concrete.

No recommendations are included in this Code for the use of embedded heating in basements, floors and wall or for the special requirements in connection with the design and construction of cold-stores.

NOTE The titles of the British Standards referred to in this Code are listed on page 26.