Losses of heat within a building will result in not only a building being energy inefficient, but in increased costs to heat it. Many households are suffering from being in fuel poverty, so activity taken to mitigate this will result in not only a warmer, more energy efficient home, but energy bills should reduce too.
Recognising that party cavity walls are a source of heat loss is the first step, and there are solutions available to solve this and meet the requirements of Building Regulations Part L.
The definition of party wall thermal bypass simply means that heat bypasses insulation and escapes to the external environment. This heat loss is relatively simple to address and can be solved by filling the cavity with an insulation product. Here, Saint Gobain – Isover explain how party wall bypass occurs, and more importantly, how it is resolved.