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U values for new build home in England.

Discussion in 'Building Regulations and Planning Permission' started by PULLMYFINGER, 11 Oct 2018.

  1. PULLMYFINGER

    PULLMYFINGER

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    Hi does anyone know what the current u values are that must be met for a new build house in England regarding insulation thicknesses. Walls will be cavity and floors will be block and beam. i've googled it but keep getting conflicting values...is it 0.16 for walls and 0.15 for floors?

    cheers for any help.
     
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  3. JP_

    JP_

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    Floors depends on size of room doesn't it? If it helps, my extension had 10cm rockwool with aerated blocks, and the floor had 75mm insulation board - area was 50m2 ish.
     
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  4. PULLMYFINGER

    PULLMYFINGER

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    Hi cheers for the reply...is there not a certain u value you need to meet for cavity walls and floors? once i have that i can decide on the construction/build up.

    Just wondering what u values you need to meet really?
     
  5. ^woody^

    ^woody^

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    You're building a new home and the main criteria is the u-values and construction of walls and floors? o_O

    Would it not be better to worry about designing something you actually like the look of, in the layout that meets your needs and then use SAP for the whole house rather than worry about individual elements?
     
  6. JP_

    JP_

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    Also, if I was building a house myself, I'd go well over minimum u values - I'd be tempted to aim for zero carbon.

    Make it as cheap to heat as possible.
     
  7. PULLMYFINGER

    PULLMYFINGER

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    Does anyone know the minimum u values?
     
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  9. JP_

    JP_

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    http://www.kingspaninsulation.co.uk/buildingregulations/

    and

    http://www.kingspaninsulation.co.uk....global/ADL1A-2013-1st-Issue-UK-EN-Mar-14.pdf

    The most practical route forward for developers may well be to continue to work with an air–permeability target of 7 m3/hr/m² at 50 Pa and to continue to adopt the 2007 ACDs, whilst compensating by adopting better fabric U–values than suggested by the ADL1A 2013 notional dwelling specification. Modelling carried out by Kingspan Insulation suggests that the values shown in Table 4 are the best starting point U–values if adopting this latter approach.

    U–value Element (W/m2. K) All Roofs 0.11 Walls 0.16 Floors 0.11 Table 4: Best Starting Point U-values
     
  10. tony1851

    tony1851

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    There are no set standards for new-build house, you have to do a SAP.
     
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  11. JP_

    JP_

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  12. PULLMYFINGER

    PULLMYFINGER

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    cheers folks.
     
  13. ^woody^

    ^woody^

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    Looks like a good start :rolleyes:
     
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