The survey will involve;

• Inspection of meters (gas and electric)
• Inspection of wall construction and any insulation (internal, external or cavity) the assessor will also measure the wall thickness.
• The DEA will need to determine whether the floor is suspended or solid. Documentation will need to be provided to evidence any floor insulation.
• The windows will be assessed. Newer windows will generally have a date stamp on the frame. Draft proofing will also be checked.
• The heating system will require identification, normally a newer combi system will have a GC number which the assessor can use to identify the make and model. The heating controls will also be noted.
• Loft insulation thickness will be measured. If the loft is inaccessible or boards are covering the insulation, documented evidence will need to be produced otherwise the insulation will be assumed.
• Now knowing how the heat arrives (e.g boiler) and how the heat escapes ( floor, wall and roof) the Domestic Energy Assessor will carry out a floor plan to create a model and measure the volume of the property to determine how much space is being heated.