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The importance of good Insulation

There are three areas to concentrate on. Outlined below are a few details and some potential solutions to consider.  

  • Walls
    • Main source of heat loss, 35%
    • Some houses can have a ‘U value’ as high as >2, current UK building regulations aim for a maximum of 0.25.
      • Make the insulated cavity between brickwork and blockwork 90mm thick or more.
      • Fill with a good quality insulation material
      • Consider timber framed walls rather than block
  • Roof
    • Accounts for 25% of a homes heat loss.
    • Can have a U-value of >7. Should aim for 0.13, a big area for energy efficiency gain.
      • Install at least 270mm insulation in two layers, one between ceiling joists, one across them to stop thermal bridging. Do not compress the insulation in corners.
      • Seal attic door to stop draughts. 
  • Floor
    • Accounts for 15% of the homes heat loss.
    • Should aim for a U-value of 0.20 or lower.
      • Whether using concrete or timber floors, use insulation material to increase energy efficiency. 

A note about 'U' values. These simply measure how energy efficient a part of a building is, the lower the value the better the house will retain its heat and therefore the less will be wasted, leading in turn to lower heating bills.

For more information on the topic of Insulation, the Energy Savings Trust has a friendly web site, click the link below.

Click here for the est