**'U' Value Calculations **

As an accredited On Construction Domestic Energy Assessor (OCDEA) I am qualified and experienced in the production of 'U' value calculations which are calculated using software provided by National Energy Services.

'U' values are calculations of the rate of heat loss through different elements of a building. For example the external roofs, walls and floors.

The 'U' value of a building element is the rate of loss of heat per square metre area of that element per degree Centigrade temperature difference across that element.

The units of 'U' value are Watts per square metre per degree Centigrade - or W/m2K.

The lower the 'U' value the slower the rate of heat loss. For, example an external wall with a 'U' value of 0.60 W/m2K loses heat at a quicker rate than an external wall with a 'U' value of 0.20 W/m2K.

'U' values are required as component sub calculations which contribute towards data required for Standard Assessment Procedure (SAP) home energy rating calculations.

They may also be required to inform improvements to existing dwellings when seeking funding for other schemes such as the Energy Company Obligation (ECO).