Insulating a pitched roof is one of the most effective ways to improve the energy efficiency of a property. By curbing heat loss in the winter and excess heat gain in summer, a well-insulated roof can substantially reduce reliance on heating or cooling systems, leading to significant savings in energy costs over time.
There are many different types of pitched roof insulation available. Some are blown into place, while others are fixed using mechanical fixings. The best pitched roof insulation for your home will depend on a variety of factors, including the thickness and U-value required. A qualified energy surveyor can provide you with accurate pitch roof insulation cost estimates as part of a comprehensive home assessment.
Pitched roofs are often constructed from wood or steel purlins and may include gable ends, ridges, hips, and valleys. They also feature a pitched soffit or ceiling, which is usually clad with timber boards or tiles.
When building a new house or refurbishing an existing dwelling, it’s important to add the right pitched roof insulation for maximum energy efficiency. The main way to do this is by adding insulation between the rafters, which creates a so-called warm roof construction. Alternatively, you can fit insulation over the rafters, which is referred to as a cold roof.
When fitting a cold roof, you will need to fit a breather membrane, such as nilvent, above the insulation. A 50 mm air gap is recommended to help with ventilation and prevent moisture or condensation.