How To Make A Valley On A Roof

In this video we ll flash the valley.

How to make a valley on a roof.

Therefore the pitch of the valley rafter is 12 in 17. Roof valleys are like gutters with a steep pitch but the stakes are higher for valleys than they are for gutters. Closed cut valley even if i work toward the valley with three tab shingles cut valleys are faster than woven valleys hands down. The valleys on many older houses comprise layers of roofing paper which can deteriorate over time.

A roof valley is very prone to leaks especially if you have an older roof. Then enter those measurements into an online roofing calculator to determine how long each common rafter will need to be. First clean the debris out of the valley including sawdust nails and whatever else is in there. Next once you know the lengths of the rafters cut some wooden planks to size and make birdsmouth cuts in each one so.

In other cases shingles are overlapped to make a valley and water from harsh rains can find a. In a previous video we covered how to flash roof edges before shingling. To build a hip roof start by measuring the width and height of the building you re putting the roof on. 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.

Plus cutting the closed cut valley shingles can happen after the rest of the roof. On the common rafters the plumb cut is marked with a framing square for a 12 in 12 pitch 45 and cut square i e no bevel. The three methods to shingle a roof valley. Iko recommends that you install architectural shingles with the open valley method for the best roof performance.

This recommendation includes iko s premium shingles. The valley area of a roof the straight lines formed when two different planes of the roof meet is a critical area that handles a tremendous amount of water run off. When deciding how to shingle a roof valley you will need to consider your materials the climate and the desired look of the roof. Valleys are typically found where gable dormer roofs meet the main roof or when a house has angled wings or additions where two roof sections in different planes meet.

With a closed cut valley there s no need to shingle the two roof planes at the same time.