How To Construct A Roof Valley

Where the pitches are not the same the batten spacing runs out of sync.

How to construct a roof valley.

To understand the concept and how all the pieces are laid out and cut i picture the roof two dimensionally in plan view. The roof construction for mortarless valleys is similar to that for open grp valleys. To build a hip roof start by measuring the width and height of the building you re putting the roof on. These valleys have large upstands each side of the upstand to direct water towards the gutter.

To understand what makes a valley either closed or open it is important to understand how a valley is constructed. Part 1 a guide to roof construction covers an overview of flat and pitched roofs. There are two common methods for completing the flashing of a valley in a shingle roof system. Instead of having an open channel like traditional valleys mortarless valleys have a central upstand and the tiling is finished close to the upstand on each side.

This recommendation includes iko s premium shingles. Part 3 of the four part guide to roof construction covers pitched roof detail. Iko recommends that you install architectural shingles with the open valley method for the best roof performance. One of the details that varies between homes is the method of flashing the valley areas of the roof.

This roof valley is a perfect example. Often people use special valley tiles that are curved to make a seamless tile roof. The three methods to shingle a roof valley. When deciding how to shingle a roof valley you will need to consider your materials the climate and the desired look of the roof.

To get started i need to know only two things. Roof ridges and ridge tiles roof hips and hip tiles roof valleys roof verges and lead flashings. Then enter those measurements into an online roofing calculator to determine how long each common rafter will need to be. However these can only be used where the pitch of the two roofs is the same.

Next once you know the lengths of the rafters cut some wooden planks to size and make birdsmouth cuts in each one so. The first is the pitch of the roof. The pitch of the old and new roofs were close but not the same so i would have to create open valleys instead. Closed valleys or open valleys.

How to do a roof valley martin s roofing and guttering merton ltd for all your roofing needs.