In the Fresno, flat and low-slope roofs face unique challenges. The intense summer sun degrades standard materials, and winter rains can lead to dangerous ponding water. A high-quality single-ply roof—such as TPO or PVC—reflects UV rays and creates a watertight, energy-efficient barrier that adds lasting value to your property. But a single-ply membrane will inevitably fail if it is applied over trapped moisture or damaged insulation.

At GrandMark Service Company, we treat your flat roof as an integrated system. Before rolling out your new single-ply membrane, we utilize a process of careful inspection to uncover the true story of your roof’s health. We ensure your property has the flawless foundation required to support a long-lasting, leak-proof seal.