Your home can lose heat through the floors, walls, roof and windows. There are ways to prevent or reduce this heat loss, and improve your home’s energy efficiency. Loft Insulation can be one of the easiest improvements to make. Often homes lack insulation in these areas, even if the rest of the home is well insulated. We always incorporate full insulation in our loft conversions. This ensures minimal heat loss and reduced energy consumption.
This table shows the approximate amount of heat lost from the home. Understanding these key areas help to minimise the amount of wasted energy and money.
Installing Loft Insulation
Cold Roof Insulation:
Insulation laid between and over the ceiling joists. This means everything above the insulation, is colder than the living spaces. Warm, moist air condenses in the cold loft space. Ventilation in the roof removes this damp air and thus minimises condensation forming.
Warm Roof Insulation:
Insulation laid between and over the rafters. This then means everything below the insulation is as warm as the living spaces. Leaving a small gap of 50 mm above the insulation and below the roofing underlay. This then allows a ventilation path between the eaves and the ridge.
What is U value?
U-value is a measure of how effective a material is an insulator. The lower the U-value, the better the material is as a heat insulator.
Government energy efficiency regulations has introduced U value limits for new buildings.
Insulating roofs, walls or floors can help your building’s U value. Insulation with the right thermal benefit and fit for purpose within the space available is important.
The Roof space will have a U value of around 2.5 w/m2k. Some roof insulation boards offer U values as low as 0.02 w/m2k and are only 40mm thick. Most loft roll insulation, will need to be much thicker to achieve similar values.