Water Leak On Flat Roof

Run water from a garden hose along any potential trouble spots.

Water leak on flat roof.

The more overhang you can achieve into a gutter the less chance you have in capillary action of water creeping back up the roof sheet and entering the roof. If the leak isn t obvious have a helper watch in the attic while you get on the roof with a garden hose. Flat roof leak roofs can be a devil to locate. Most flat roofs are very slightly sloped to facilitate runoff so explore from the point of the water s entrance up the.

I took this video while i was doing a commercial repair on a building hope the tips i give you on this. The same thing can happen on sloped roofs however you can usually discount all the roof area below the area where you see the leak. Begin soaking low on the roof just above where the leak is visible inside the house. On a flat roof we suggest starting at 100mm of overhang.

The reason is that water can enter one spot and not really express itself inside until it is far away from the leak. From inside measure the distance from where the leak is visible to the two nearest walls. The minimum standard is 50mm. Look in the attic with a flashlight for evidence like water stains trhen trace them up the roof and rafters to the entry point.

Wait inside for several minutes for the water to begin to drip. Use those measurements on the rooftop to create a starting point for your search.