When it comes to roofing, one of the most critical areas for potential leaks is around roof penetrations – places where pipes, vents, flues, or ducts pass through the roof surface. Properly sealing these areas is essential to prevent water intrusion and maintain the roof’s integrity, avoiding the need for commercial leak repair. One effective method used by roofing professionals is dry panning.
What Is Dry Panning?
Dry panning involves installing a flat sheet of metal, known as a “pan,” beneath and around the penetration point. Unlike traditional methods that rely heavily on sealants or wet flashing, dry panning is designed to create a mechanical barrier that diverts water away from the vulnerable penetration area. The term “dry” refers to the fact that the system doesn’t rely solely on sealants – instead, it channels water using gravity and proper lap joints to ensure it stays watertight even if sealants deteriorate over time.
This method is especially common in metal roofing and commercial flat roofs, where penetrations are frequent and long-term durability is crucial. The pan is typically fabricated from galvanized steel, aluminium, or another corrosion-resistant metal and shaped to fit tightly around the penetration. The edges are lapped under the roofing sheets or flashing above, ensuring that water naturally flows over and away.
Benefits of Dry Panning
The benefits of dry panning are significant. It reduces maintenance requirements, extends roof life, and provides a more reliable waterproofing solution than relying solely on caulking or adhesives. It also allows for easier inspection and replacement if the penetration needs modification in the future.
In short, dry panning is a smart, long-lasting approach to managing roof penetrations. When done correctly, it’s one of the best defences against leaks, ensuring your roof – and everything beneath it – stays protected year after year.
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