A professional roof survey provides a clear, evidence‑based understanding of your roof’s condition, performance and any defects that may be contributing to water ingress or deterioration. GAP Roofing Services delivers comprehensive roof surveys for residential, commercial and industrial buildings, combining traditional inspection methods with advanced diagnostic technology to give clients reliable, actionable information.
Why Choose GAP Roofing Services?
With more than 22 years’ experience in building envelope diagnostics and roof refurbishment, GAP Roofing Services delivers accurate, reliable and professional roof surveys tailored to each property.
We attend over 200 sites every year and diagnose and resolve approximately 700 leaks annually, giving us unmatched practical insight into real‑world roof performance and failure patterns. Whether you are investigating leaks, planning future works or assessing the condition of an ageing roof, our surveys provide the clarity and evidence you need to make informed decisions.
Our surveys begin with a detailed visual inspection of all accessible roof areas. We assess coverings, flashings, drainage routes, penetrations, upstands, terminations and any signs of wear, ageing or failure. This forms the foundation of the survey and helps identify areas requiring further investigation
Where water ingress is suspected, we utilise professional moisture meters to measure moisture levels within ceilings, walls and roof build‑ups. These readings help determine the severity and spread of moisture penetration and support accurate diagnosis of leaks and hidden defects.
Thermal imaging is used to detect temperature variations across the roof surface, highlighting issues such as trapped moisture, insulation failure, cold bridging and hidden leaks. Infrared technology allows us to identify defects that are not visible during standard inspections, providing deeper insight into roof performance.
For areas that are difficult or unsafe to access, we carry out drone surveys using high‑resolution aerial imaging. Drone inspections allow us to capture detailed photographs of the entire roof safely and efficiently, ensuring no areas are missed. All drone imagery is included within the final report.
In certain cases, core samples may be taken to examine the roof build‑up, insulation condition, vapour control layers and substrate integrity. Core sampling provides definitive information about the construction and condition of the roof and is carried out in accordance with best practice, with all openings reinstated to maintain waterproofing integrity
All findings are compiled into a structured roof report containing:
Our reports provide clear, practical guidance to help clients plan maintenance, repairs or full refurbishment works with confidence.
