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RECENTLY ARCHIVED - Conventions for U-value calculations (2006 edition)

ARCHIVED - RECENTLY ARCHIVED - Conventions for U-value calculations (2006 edition)

by B Anderson (11-Jul-2006)


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Book Description


Whilst this publication can still be purchased some of the information in it has been superseded by more recent research and standards. The BRE Group does not accept any responsibility whatsoever for any loss or damage, including - without limitation - indirect or consequential loss or damage arising from use, or loss of use, of data or profits arising out of, or in connection with, the use of this document.

'Conventions for U-value calculations' guides
the architect and specifier for calculating
U-values by:
- indicating the methods of calculation appropriate for different construction elements: roofs, walls, floors, basements, windows and doors
- providing further information about using the methods
- providing data relevant to typical UK constructions.
Particular guidance is given on thermal conductivity of materials, and on various issues commonly arising when calculating U-values and how they apply to different construction types.

This 2006 edition of the guide is fully updated in line with Part L of the Building Regulations that came into effect in April 2006. 44 pages.


1 Introduction
2 Numerical methods and simplified methods
- Numerical methods
- Simplified methods
- Numerical and simplified methods used together
- Thermal bridging at junctions and around openings
3 Thermal properties of materials and products
- Declaration of thermal properties of products
- Values for use in calculations
- Masonry
- Concrete beams and concrete screeds
- Insulation materials
- Gypsum plasterboard
- Structural timber
- Metals and alloys
- Thermal conductivity of other materials
- Reflective foil products
4 Issues concerned with U-value calculations
- Surface resistance
- Mortar joints in masonry construction
- Voided masonry units
- Foam-faced blocks
- Timber fraction for timber-framed walls
- Timber fraction for other elements
- Plasterboard wall lining
- Airspace resistance
- Corrections to thermal transmittance
- Metal-faced roofing and wall cladding
- Light steel-framed walls
5 Elements adjacent to an unheated space
6 Expression of results
7 U-values for walls
8 U-values for roofs
9 U-values for floors
- Slab-on-ground floor (ground-bearing floor slabs)
- Suspended floors
- Floor exposed on underside
10 U-values for basements
- Heated basements
- Unheated basements
11 U-values for windows, roof windows and rooflights
- Roof windows and rooflights
12 U-values for doors
Appendix A: Elements adjacent to an unheated space
Appendix B: U-values of uninsulated floors
References and further reading

Other publications that may also be of interest
Part L explained - The BRE guide
Conventions for calculating linear thermal transmittance and temperature factors

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