Site Preparation and Resistance to Contaminants and Moisture - ENGINEERING MANAGEMENT
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Saturday, October 1, 2016

Site Preparation and Resistance to Contaminants and Moisture

Site Preparation and Resistance to Contaminants and Moisture

Unfortunately, it is a fact that the Building Regulations and Approved Documents

get more complex with every update, often requiring the services of specialist

professionals to make sense of the provisions (which even they find difficult to
understand!). New areas of control are being introduced each year and the scope
of the existing regulations is being extended with each revision.
The current Approved Documents only provide detailed guidance in the design
of extremely simple and straightforward buildings using mainly traditional techniques.
Larger and more complex buildings require access to other source
documents but, although these are referred to in the Approved Documents, no
details of their contents or advantages of use are given. Therefore, the Approved
Documents are becoming less and less useful to anyone concerned with the design
and construction of any but the most simple of buildings, and are in danger of
becoming merely an index of references.

To date, currently published guidance works on the Building Regulations and
Approved Documents have tended merely to restate the official guidance in a
simpler fashion with additional illustrations. Some of these works have restructured
the guidance in an attempt to make it more user-friendly, but have not really
added value. Additionally, where the Approved Documents have made reference
to alternative guidance sources the texts have tended to do the same – without
attempting to state what advantages might be gained by using a different approach
and without giving even the most basic details of what might be contained in the
reference texts.

Part 1 of this book is introductory and gives a broad overview of the Building
Regulations and the control system. It also includes an introduction to Part C
and Approved Document C and sets out the factors which were considered in the
revision of the previous (1992) edition of Approved Document C.
Part 2 covers site preparation and resistance to contaminants. The guidance on
resistance to contaminants has undergone a great deal of revision, due mostly to
new regulations made under Part IIA of the Environmental Protection Act 1990.
This has resulted in the provision of new guidance on the risk assessment of sites.
Part 3 deals with resistance to moisture. Here, the most significant changes
involve new guidance on avoiding the occurrence of interstitial condensation in
floors, walls and roofs, and on measures to prevent surface condensation and
mould growth. To achieve this, some of the guidance that was previously located
in Approved Document F Ventilation (concerning ventilation of flat and pitched
roofs) has been updated and relocated in Approved Document C.

The aim of this book (and this series of books) is to provide a convenient,
straightforward, comprehensive guide and reference to a complex and constantly
changing subject. It must be stressed that the books in this series are a guide to
the various regulations and approved and other documents, but are not a substitute
for them. Furthermore, the guidance in the Approved and other source documents
is not mandatory and differences of opinion can quite legitimately exist between
controllers and developers or designers as to whether a particular detail in a building
design does actually satisfy the mandatory functional requirements of the Building


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