Technical newsletters about emerging issues & our latest research

Implications of the new Code guidance

Posted on December 13th 2010

The  latest  revision  to  the  Code  for  Sustainable  Homes  (CSH)  was  launched  last  month  (Nov  2010). Schemes can be assessed under the former May 2009 version up until the 9th of December but after this date  must  use  the  new  version,  unless  the  scheme  is  being  developed  under  the  2006  Building Regulations (Part L). It is early days to be …

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Demonstrating compliance with Part L 2010

Posted on December 6th 2010

Is a good EPC rating a guarantee of good energy performance? Rightly or wrongly, there has been a concern that design criteria for energy efficiency, which are used by energy assessors as the basis for energy performance certification, have not always carried through to the final construction of projects. New requirements in force with the introduction of Part L 2010 …

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BREEAM Communities

Posted on October 25th 2010

BREEAM Communities: Categories & Issues Climate and Energy CE1: Flood Risk Assessment* CE2: Surface Water Runoff* CE3: Rainwater SUD CE4: Heat Island CE5: Energy Efficiency* CE6: Onsite Renewable(s)* CE7: Future Renewables* CE8: Services CE9: Water Consumption* Community Section COM1: Inclusive Design* COM2: Consultation* COM3: Development User Guide* COM4: Management and Operation Place Shaping PS1: Sequential Approach* PS2: Land Reuse PS3: …

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Guide to Part L1a 2010 criteria

Posted on October 4th 2010

Approved Document Part L1a – New Dwellings Design Stage SAP to Building Control “No later than the day work starts” Approx 25% reduction in CO2 emissions compared with a 2006 compliant dwelling Maximum average fabric u-values have decreased (eg Walls from 0.35W/m2K to 0.3W/m2K) Carbon emissions for electricity from grid increase by 22.5% (Partly compensated for by a new Emissions …

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Why do green roofs die?

Posted on October 1st 2010

There are several different types of green roofs.  Intensive roofs are thicker and heavier more like roof gardens and require regular maintenance.  Extensive roofs are lighter and typically sedum based, requiring less maintenance, often only once a year depending on the location of the roof. Typical requirements of an extensive roof is yearly fertilizing and weeding, and in autumn clearing …

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CHP design considerations

Posted on August 23rd 2010

The following issues should be considered at an early stage of design as part of an evaluation of the viability of CHP. Organising a connection to the grid Unless a CHP engine can be connected to the grid, its size may be significantly reduced. This is so that demand for electricity across a development is not a constraint on the …

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Solar renewables and Part L 2010

Posted on August 9th 2010

Photovoltaic (PV) Panel Annual Energy Output SAP 2009 has been updated to calculate CO2   Reduction in CO2 However, another change is that the SAP carbon emission factor for electricity displaced from the grid has been reduced. The net effect of these two changes taken together is that the reduction in kgCO2 The implication of this, as considered in more …

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Take-up of the Code

Posted on June 21st 2010

Please download our PDF for the full article. take_up_cfsh  

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BREEAM Communities – assessment criteria

Posted on May 17th 2010

CLIMATE CHANGE New developments should reduce their contribution to climate change and mitigate for the anticipated impacts in the future. This category considers flood risk, energy and water efficiency, renewable energy provision and building services. RESOURCES Master plan proposals should include consideration of the efficient use of resources, including water, materials and waste in construction, operation and  demolition.  This  category  …

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Improving air tightness in new dwellings

Posted on April 5th 2010

The importance of air tightness in new dwellings Up to 30% of heat losses in a modern, well-insulated building are estimated to result from ‘air leakage’. Heat escapes through gaps in the building envelope, such as around a pipe fitting, or between poorly fitted slabs of wall insulation. This is heat loss by ‘convective bypass’, and in the worst case …

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