Roofing felt serves as a moisture barrier, protecting the underlying structural materials of a roof from water infiltration. The primary function of roofing felt is to act as a secondary line of defence against water intrusion. When installed beneath shingles or other roofing materials, it plays a critical role in preventing leaks and protecting the home’s structural integrity. The weatherproofing characteristics of roofing felt are particularly vital when considering the potential damage that moisture can cause, such as rot, mould, and degradation of roofing components. Without this protective layer, water can seep into the roof’s structure, leading to costly repairs and increased risks to occupants’ health due to mould exposure.

Moreover, roofing felt contributes to energy efficiency by providing thermal insulation. This insulation helps maintain a stable indoor temperature and reduces heating costs. Its importance cannot be understated; a well-installed layer of roofing felt results in longer-lasting roofing materials and minimises wear and tear from environmental factors. Over time, however, roofing felt can deteriorate due to exposure to the elements, which may compromise its effectiveness. Thus, understanding the role of roofing felt in a roofing system is crucial for any homeowner looking to maintain their property’s integrity and extend the lifespan of their roof.