Pitched roof thermal insulation

There are three basic methods of thermally insulating roofs: insulation above the rafters, insulation between the rafters, or a combination of the two methods. In the case of above-rafter insulation, which is the best insulation method in structural terms, a continuous cover of insulation panels is installed across the entire roof area. This means that the rafters can have a smaller cross-section. In the case of between-rafter insulation, the specified thickness and quality of the insulation material dictates the thickness of the rafters. As a result the rafters are in any case larger than would be structurally necessary. Furthermore, thermal bridges are created by the rafters and walls, which makes the insulation less effective. It's rather as if you were to cut strips out of your winter overcoat. The system known as combination insulation rectifies the weak points in between-rafter insulation, thus making slimline roof structures possible.

Worth knowing ...

Adding extra insulation makes sense!

Here are the facts: the decision made today concerning thickness of insulation will have a direct effect, over the next 30 to 40 years, on your heating bills, the level of comfort in your home and even your home's market value. Because one thing is certain: oil, gas and electricity prices will go up in the long term. Building regulations are also become more and more strict.
It is therefore well worth going beyond what is required under current energy saving regulations and investing in a greater thickness of insulation and in high-performance insulation materials like BauderPIR.