Flow Down The Roof

Look for damp spots on the underside of your roof.

Flow down the roof.

They can be several feet above the leak or to the right or left of it. This means that the rise of the slope goes up or down 8 inches for every 12 inches. Follow the water uphill till the wood is no longer wet. Kick out flashing is critical where a roof edge meets a sidewall.

An example for a steep sloped roof is 8 12. Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic. Place a piece of standard metal drip edge onto a table or between a pair of sawhorses. Insert the head into the vent opening and feed it down until you encounter resistance.

Turn it upside down so the lip edge faces upwards. The slope of a roof or pitch is determined by how many inches the roof rises over 1 foot or 12 inches. If it is reduced further the flow boundary will at first be sucked down and will continue to flow along the slope and a change from pressure to suction will occur. This valley shoots rain in a flume during our frequently heavy downpours.

This is worst when there is a door or a window below and water can seep behind the trim. Also look for a thin stream of water flowing down one of the rafters. Look for potential entry points like roof vents valleys loose nails and mark the area with chalk so you can examine the exterior of your roof after it quits raining. Hot air exhaust vents located at the peak of the roof allow hot air to escape.

Numerous people have tried ideas but none have worked. Drip edge is available at hardware stores and it is made. If you have attic access the easiest way to track down a leak is to go up there with a flashlight and look for the evidence. Penetrations can include plumbing and roof vents chimneys dormers or anything else that projects through the roof.

You might not notice it for years but eventually rot will destroy sheathing and framing. Crank the handle to work the head through the obstruction. If the slope of the roof is reduced a point will be reached at which pressure on the windward slope becomes zero. To put it in perspective the angle of this slope would be around 30 degrees.