1 item tagged "energy statement"

  • Energy Statement for planning

    Energy Statement for planning

    Increasingly, local authorities are asking for an Energy Statement, often combined with a Sustainability Statement for planning applications.

    An energy statement will demonstrate how a development will meet the demands of local planning and building regulations policies, the London Plan requires that a development must reduce its carbon footprint by as much as 40% over and above the requirements of L1A 2010. While other local authorities around the country require less or even no reduction in CO2 emissions.

    This variation in planning can cause lots of issues for house builders and developers, what works in one part of the country won't necessarily work in others, as with all our reports we identify how to gain efficiencies and CO2 reductions using a fabric first approach, current building regulations have much less stringent requirements than Part L, Part L requirements have much lower U-Value figures than building regulations, an example of this can be seen below:

     

    ElementPart L MininumBuilding Regulations Minimum
    Exposed Wall0.18w/m2k0.30w/m2k
    Exposed Floor0.13w/m2k0.25w/m2k
    Exposed Roof0.20w/m2k0.13w/m2k

     

    As you can see, in some cases the target U-Values for Part L are nearly half the target U-Values for building regulations, many of our clients like to use traditional construction methods such as full fill brick and block cavity walls, this is fast becoming an unviable option as even with the best block and insulation the U-Values is around 0.24w/m2k a long way off the 0.18w/m2k maximum in Part L, the Notional Dwellingwhich is s dwelling of the same shape and size of the dwelling design is now the comparison for Part L, so a building must perform the same or better than the Notional Dwelling in order to pass, in early version of SAP it was beneficial to simply add some form of renewable to a building to get it through, but since the introduction of the Dwelling Fabric Energy Efficiency (DFEE) this is no longer possible as a means of getting a dwelling to a pass. Now in SAP there are two elements to pass, the Dwelling Emission Rate (DER) against the Target Emission rate (TER) and the Dwelling Fabric Energy Efficiency (DFEE) against the Target Fabric Energy Efficiency (TFEE), it is possible to have a pass in DER/TER but fail in DFEE/TFEE, this is why it's important to ensure the thermal efficiency of the dwelling at the design stage.

     

    Thermal Bridging

    Thermal bridging is also a new requirement for Part L, no longer is it acceptable to put an average figure into the software, now, each thermal bridge must be measured and identified in the plans, this is not only more time consuming but there is also a lick of understanding by house builders about where and how thermal bridging can occur, beyond that, finding information on accredited and enhanced details is frustrating.

    The Energy Statement

    The Energy Statement is designed to act as a working document to help inform decision making, help with cost analysis and help with planning, SAP Calculations, and SBEM Calculations will also help provide the evidence of adequate reductions to satisfy planners and building control.

    The Energy Statement will demonstrate the following:

    Baseline ‘standard’ case CO2 emissions and energy costs

    Improvements to fabric efficiency beyond building regs standards

    Improvements to HVAC and lighting efficiency beyond building regs standards

    How the development will meet CO2 reductions with renewable technology

    Renewables feasibility study

    How the development will meet local energy plans and policies

    How the development will make use of local power and renewables networks

    There may also be additional requirements for the Energy Statement depending on the requirements of the local authority.

    Build Compliance will ensure that all Energy and Sustainability Statements are bespoke to a specific local authorities requirements and additional requirements such as the London Plan

     

    Contact Us

    If you have been asked to provide an Energy Statament or Sustainability Statement to support your planning application why not give us a call on 0800 699 0904 or email info@buildcompliance and we will be more than happy wo discuss the project with in greater detail. Alternatively you can fill in our online quote request form here

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