Why Drain a Roof?
The roof industry now accepts that long-term membrane performance and adequate roof drainage go hand in hand. Many membrane manufacturers will not warranty the performance of their membrane without positive drainage. The following is a list of problems created by ponding water on the roof deck. Minimize Leakage Problems Ponding water is a reservoir for moisture invasion.Imperfections such as fishmouths, unsealed laps, splits, cracks or holes caused by dropped tools will then leak. Protect roof decks Moisture will damage roof decks, such as wood or metal. Replacing rusted metal and rotted wood greatly increases the cost of reroofing. Prevent ice damage Frozen water attaches to the roof membrane and will move with changing temperatures. This movement can break down or tear the membrane, resulting in premature failure. Prevent stress from ponding The weight of ponding water can overstress a roof structure, causing structural members to sag, and in severe cases, causing roof collapse. Elim
Related Questions
- My neighbours downspout (roof drain), previously connected to a storm service inside the house, now drains onto my property. What should I do?
- Did you know that a siphonic roof drain system can be used successfully with water harvesting?
- Did you know that a siphonic roof drain system can reduce stormwater runoff from the roof?
