How To Seal A Roof Valley

The reason why the roof valley is such a sensitive area has to do with all the rainwater and or melting snow that accumulates and flows through the valley on its way into the gutters.

How to seal a roof valley.

Best practices for sealing the metal roof valley vary based on the slope of the roof. Iko recommends that you install architectural shingles with the open valley method for the best roof performance. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. Roof valleys are channels designed to drain runoff water and like any other part of your roof they can degrade over time with exposure to the elements.

A roof valley is very prone to leaks especially if you have an older roof. Roof valleys are the v shaped metal channels that sit between the folds of the roof where two sloped sections meet. Step 2 remove the shingles. Stop nailing 6 inches from the center.

Valley seal eliminates the need for expensive cement bedding. Shingle the other side of the valley the same way. How to seal metal roof valley. Once the roof valley has begun to leak you will need to cover the valley with flashing in order to prevent a repeat of the problem.

When deciding how to shingle a roof valley you will need to consider your materials the climate and the desired look of the roof. Use fasteners to attach the panel to the structure making sure that there is complete compression of the sealant. Though roof valleys are com mon leak sites on shingle roofs it s typically fairly easy to fix these problems with a little know how. This video shows the traditional and best way to repair a lead valley on a roof.

Check the entire roof valley carefully to locate the source of these problems. Low slope roofs slope less than 3 12 use tape sealant between the valley trim and the panel. In order to lay the flashing the shingles on the roof will have to be removed. The three methods to shingle a roof valley.

To seal make sure there is no debris in the valley. Valleys channel water away and. This recommendation includes iko s premium shingles. The distance between the shingles should widen from the ridge to the eave at 1 8 inch per foot of valley.

Lift each shingle and use roofing cement to coat the area that lies on the valley. Check that the roofing material is cut in a straight smooth line on each side. In other cases water can become trapped under shingles which have been overlaid to create the valley trough. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley.