| The Approved Documents |
| |
| Part L1A: Conservation Of Fuel And
Power In New Dwellings |
| n these days of fuel conservation,
protection of the ozone layer and prevention of global warming,
it is worth reflecting on the fact that half of the power consumed
in this country is through the heating of buildings. This requirement
ensures that adequate thermal insulation standards are achieved
and efficient controls of energy use are provided in new dwellings. |
| |
| Click here for a downloadable
version of the Approved Document Part L1A |
| Approved
Document L1A: Conservation of fuel and power (New dwellings)
(2006 edition) (PDF 317 Kb) |
| |
| Additional Guidance |
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| Domestic heating compliance guide |
 |
This guide identifies standards that meet
the requirements for systems in new build and those in existing
buildings when work is being undertaken. The 'Domestic heating compliance
guide' covers a range of frequently occurring situations but alternative
means of achieving compliance my be possible. The guide also refers
to other publications which include information on good practise
for design and installation over and above the minimum regulatory
provision. |
| Domestic
Heating Compliance Guide (PDF 757Kb) |
| |
| Low or zero carbon energy sources:
Strategic guide |
 |
Low and zero carbon (LZC) energy sources
are increasingly being installed in buildings, for example: small-scale
and micro-CHP units, photo-voltaic panels and building-mounted wind
generators. This Strategic Guide is intended to support the inclusion
of LZC energy sources in Approved Document L1A, L1B, L2A and L2B. |
| Low
or Zero Carbon Energy Sources (PDF 720Kb) |
| |
| Measuring air permeability of
building envelopes |
 |
The increasing need for higher
energy efficiency in buildings and the need to demonstrate compliance
with the building regulations stringent targets means that airtightness
has become a major performance issue. The procedures for measuring
air leakage in buildings is explained in this document. |
| To download this document visit
www.attma.org |
| |
| BR 262: Thermal insulation: avoiding
risks |
 |
The guide discusses the more
important technical risks associated with meeting the requirements
of building regulations for thermal insulation. Technical risks
are highlighted and these are followed by actions that could be
taken to avoid the risk. In assessing risks for a particular building,
consideration should be given to the environmental conditions likely
to occur both inside and outside the building, and its expected
life. |
| To purchase this document visit
www.brebookshop.com |
| |
| BR 443: Conventions for U-value
calculations |
 |
Calculation methods for the
determination of U-values of building elements are used to demonstrate
compliance with the building regulations. Where compliance is expressed
in terms of whole-building performance, such as CO2 emissions, U-values
obtained by the methods referred to in this document should be used
for the relevant calculations by the Standard Assessment Procedure
(SAP) for dwellings or by the Simplified Building Energy Model (SBEM)
for other buildings. |
| To purchase this document visit
www.bre.co.uk/uvalues |
| |
| IP 1/06: Assessing the effects
of thermal bridging at junctions and around openings in the external
elements of buildings |
 |
This paper gives guidance on
assessing the effects of thermal bridging at junctions and around
openings in the external elements of buildings and how to assess
their effect on the overall heat loss (or heat gain). It enables
a satisfactory estimate of these heat transfers to be made for the
purposes of carrying out building regulations compliance calculations.
The guidance is primarily intended for junction and opening details
that are not as recommended in Accredited construction details or
MCRMA/EPIC guidance. |
| To purchase this document visit
www.brebookshop.com |
| |
| TM 36: Climate change and the
indoor environment: impacts and adaptation |
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The primary purpose of this
guide is to provide a single point reference for all compliance
issues related to the treatment of pipework and ductwork insulation
within the 2006 version of Approved Document L of the Building Regulations. |
| To purchase this document visit
www.cibse.org |
| |
| SAP 2005: Standard assessment
procedure for energy rating of dwellings |
 |
This manual describes the Government's
Standard Assessment Procedure (SAP) for assessing the energy performance
of dwellings. The SAP rating is based on the energy costs associated
with space heating, water heating, ventilation and lighting, less
cost savings from energy generation technologies. The method of
calculating the energy performance and the ratings is set out in
the form of a worksheet, accompanied by a series of tables. The
method of calculating the energy performance and the ratings is
set out in the form of a worksheet, accompanied by a series of tables. |
| SAP
Manual 2005 (PDF 1.16Mb) |
| |
| CE129: Reducing overheating -
a designer's guide |
 |
Overheating in a house will not only cause
discomfort to the occupier but - if it occurs regularly or over
a sustained period - will lead to pressure for the installation
of mechanical cooling.In addition to the initial cost and ongoing
maintenance requirements of such systems there will be an increase
in the overall energy use of the property. This in turn is likely
to lead to higher carbon dioxide (CO2) emissions - at a time when
there is a pressing need to reduce them. For more information please
visit the Energy
Saving Trust website. |
| Reducing
Overheating (PDF 1.27Mb) |
| |
| GPG268: Energy efficient ventilation
in dwellings - a guide for specifiers |
 |
This guide has been prepared to help architects,
surveyors and specifiers understand the issues associated with energy
efficient ventilation and the types of systems that are available
to provide satisfactory ventilation in dwellings. For more information
please visit the Energy
Saving Trust website. |
| Energy
Efficient Ventilation in Dwellings (PDF 810Kb) |
| |
|
GIL20: Low energy domestic lighting
|
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Many factors influence the adequacy and
efficiency of lighting: this guide is intended to help designers,
builders, and installers make the best use of energy efficient lighting
and gain acceptance from occupants. If this happens, it is likely
to remain in place for years and deliver continuing financial savings
to the occupants while reducing carbon dioxide emissions to the
environment. |
| Low
Energy Domestic Lighting (PDF 371Kb) |
| |
| Archived Copies |
| |
| Approved Document L1 - 2002 edition |
| Valid: 1st April 2002 - 5th April
2006 |
 |
The requirement in this edition
was: |
| L1 - Conservation of fuel and
power |
| |
| |
| Approved
Document L1A: Conservation of fuel and power in dwellings (2002
edition) (PDF 393Kb) |
| |
| Approved Document L - 1995 edition |
| Valid: 1st July 1995 - 31st March
2002 |
 |
The requirement in this edition
was: |
| L1 - Conservation of fuel and
power |
| |
| |
| |
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| Approved Document L - 1990 edition |
| Valid: 1st April 1990 - 30th June
1995 |
 |
The requirement in this edition
was: |
| L1 - Conservation of fuel and
power |
| |
| |
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| Approved Document L - 1985 edition |
| Valid: 11th November 1985 - 31st
March 1990 |
 |
The requirement in this edition
was: |
| L2 & 3 - Resistance to the
passage of heat |
| L4 - Heating system controls |
| L5 - Insulation of heating
services |
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