we can complete an air leakage survey of your home or small business for £95
draught seal & save £100 a year
The average dwelling has total gaps & holes the size of 5 basketballs (an air leakage rate of around 12m³/hr/m²).
Draught sealing your dwelling could seal up 2 basketballs sizes of gaps and save you £100 a year.
A commercial property generally has 8 basketballs of gaps and holes or an air leakage rate of around 20m³/hr/m².
Desk top studies have shown that a 1000m² two storey office building with an air leakage of 20m³/hr/m² will lose over 3 times the amount of heat (2000w/k) than the same office with an air leakage of 20m³/hr/m² (600w/k). With an air leakage of around 20m³/hr/m² increasing insulation will make little difference without addressing air tightness.
air gaps around insulation
Gaps around insulation will decrease the effectiveness of the insulation by around 40%.
An air gap behind insulation such as in a cavity wall will create a thermal chimney and similarly decrease the effectiveness of the insulation.
Glass wool insulation such as you would find in your roof space or in the walls of timber frame dwellings are not air tight and allows air to pass through.
air leakage strategy before 2005
dwellings built before 2005 had not got an effective air leakage strategy in place and therefore may perform poorly, increasing your energy bills.
An air test will rate your home for air tightness and identify gaps and holes that can be easily sealed. It should really be completed before you add extra insulation to your home.
radiators - nearly all hot air
80% of the heat given off by radiators is through convection or warm air. To allow radiators to efficiently heat your home you have to prevent this hot air escaping from your home. This is why air leakage is so important to having a warm house.