U-Values

U-value and Your Requirements

Why U-values matter
Using building components with low U-values (i.e. good) has a number of advantages:

  • It saves money
  • It’s good for your health
  • It gives better indoor thermal comfort

A house built with low U-value building components will use less energy and the building owner saves money on their energy bills.

Good U-value building components increase the surface temperature on the inside which is critical in preventing surface mould growth.

Good U-values also improve the indoor thermal climate and create healthy buildings for their residents.


The U-value of a building element (i.e Walls, Floors or Roofs) is a measure of the thermal efficiency or heat loss through that element.The lower the U-value the better the thermeal efficiency of the element.

For new dwellings the elemential U-value is outlinned in the table below.

Structures and U-Values

  • Timber Frame New Construction Wall
  • Existing & New Pitched Ceiling Level Insulation
  • Existing & New Pitched Ceilings Warm Roof
  • Existing & New Ceiling Level Insulation