What does damp-proofing resist in roofing applications?

Damp-proofing is specifically designed to resist capillary action, which is the process by which moisture moves through the pores and spaces in materials. In roofing applications, this is particularly important because it helps to prevent water from being drawn up through the building materials from the ground beneath, or from other connected structures. By inhibiting capillary action, damp-proofing plays a crucial role in protecting the roofing system and the structure below it from moisture-related issues, such as mold growth, wood rot, and deterioration. This preservation of structural integrity ensures that the roofing system will maintain its intended function, contributing to the longevity and safety of the entire building.