Part 4: site preparation and resistance to contaminants and moisture

Part 4: site preparation and resistance to contaminants and moisture

​​This document contains:

• general guidance on the performance expected of materials and building work in order to comply with the requirements in Part 4 of the second schedule to the building bye-laws
• practical examples and solutions on how to achieve compliance for some of the more common building situations

Document 4 covers information on the resistance of moisture to floors, walls and roofs and examples of damp proofing and ventilation provisions.

Document 4 (2019) comes into effect on the 01 October 2019.

Technical guidance document 4 (2019) 
Building bye-laws (amendment No. 6) (Jersey) 2019

Note that document 4 (1997) will no longer be valid for building applications submitted after 30 September 2019.
Technical guidance document 4 (1997)