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Insulation
Wherever possible, targets should exceed those required by current legislation in anticipation of higher standards being set during the life of the building.
Initial investment in high standards will be readily offset by reduced heating and cooling loads and by the building’s capacity for adaptation to future change or intensity of use. Such targets should consider heat loss, heat gain, and the impact of change of use (for example, increased use of IT equipment internally and “churn”).
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The roofs of all heated buildings are required by building legislation to be thermally insulated. The New Approved Document Part L (2001 Edition) of the Building Regulations (England & Wales), and Part J (Scotland) implemented in 2002, define the maximum permitted Elemental U-value of flat roofs as:
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Domestic
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0.25 W/m2K
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Non-domestic (commercial, industrial, retail)
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0.25 W/m2K
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Alternative methods of compliance with the Building Regulations include:
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Domestic
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- Target U-value approach
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- Carbon index method (dwellings)
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Non-domestic
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- Whole building method
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- Carbon emissions calculation method
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Further guidance on these methods is provided within The New Approved Document Part L (England & Wales), and Part J (Scotland).
© 2006 Sarnafil Ltd. Legal Disclaimer
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