Walls, roof, windows, and doors

The facts:
In an uninsulated house:

• 26% of heat is lost through the roof
• 33% is lost through the walls
• 18% is lost through the windows
• 11% is lost through the floor and the door
• 12% is lost due to draughts and essential ventilation

The solutions:

• Cavity wall insulation is one of the most cost-effective energy efficiency measures you can take in the home. It can save you around £115 each year on your heating bill.
• Invest in draught excluders for doors, windows and letterboxes opening onto the outside to reduce the amount of warm air escaping. Gaps between skirting boards and floorboards are also worth tackling.
• Double-glazing cuts heat loss and also reduces noise and condensation problems. Savings of around £135 on bills can be expected annually if whole-house single glazing is replaced with Energy Saving Recommended double glazing.
• Close your curtains at dusk to stop heat escaping.

The stats:

• The amount of heat lost in homes annually through uninsulated lofts and cavity walls is enough to heat over 1.6 million homes for a year.
• If everyone in the UK that could installed cavity wall insulation, we would cut CO2 emissions by nearly 4 million tonnes. That¿s enough CO₂ to fill over 22 million double-decker buses or fill Wembley stadium 500 times.
• If every household in the UK, that could installed cavity wall insulation, it would save around £700 million a year ¿ or enough energy to heat 900,000 homes for the same period.
• If everyone in the UK installed loft insulation up to 270mm thickness, the financial saving would pay the gas bills of around 770,000 families for a year. We would also save nearly 3 million tonnes of CO₂ per year, the equivalent saving of taking nearly 1 million UK cars off the road.