Hi, this is a request for advice from all building experts out there regarding house insulation. My house has been given a SAP rating of 92. It is a 2 year old 4 bed detached house with 3 stories so with the house supposedly being so efficient I was expecting it to cost very little to heat to 17-18 degrees. In reality it costs a fortune. At the moment over £100 pounds per month. The heating is not on during working hours but comes on at 5.30pm and goes off at 10.30pm mon-fri. It is pretty much the same sat and sun except for coming on for a couple of hours midday. During this cold spell the boiler was lit constantly during the "heating on" times trying to get the house to 17 degrees but hardly ever managing it. The boilers temperature regulator is set at 3/4 but it makes no difference when set to max. All the TRVs on the downstairs radiators have to be set to max and the ones on the other floors to approx 4. All radiators are working fine with no trapped air. As soon as the boiler switches off we can almost feel the temperature dropping immediately. Should this amount of heat loss be expected in a house with such a high SAP rating or does it sound like I have a problem with insulation?
Any advice would be much appreciated. Thanks.
Any advice would be much appreciated. Thanks.