How To Construct A Roof Valley

To understand what makes a valley either closed or open it is important to understand how a valley is constructed.

How to construct a roof valley.

Often people use special valley tiles that are curved to make a seamless tile roof. Part 3 of the four part guide to roof construction covers pitched roof detail. To understand the concept and how all the pieces are laid out and cut i picture the roof two dimensionally in plan view. Iko recommends that you install architectural shingles with the open valley method for the best roof performance.

Where the pitches are not the same the batten spacing runs out of sync. To build a hip roof start by measuring the width and height of the building you re putting the roof on. The three methods to shingle a roof valley. There are two common methods for completing the flashing of a valley in a shingle roof system.

However these can only be used where the pitch of the two roofs is the same. Then enter those measurements into an online roofing calculator to determine how long each common rafter will need to be. 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. One of the details that varies between homes is the method of flashing the valley areas of the roof.

Next once you know the lengths of the rafters cut some wooden planks to size and make birdsmouth cuts in each one so. Roof ridges and ridge tiles roof hips and hip tiles roof valleys roof verges and lead flashings. These valleys have large upstands each side of the upstand to direct water towards the gutter. Closed valleys or open valleys.

This recommendation includes iko s premium shingles. This roof valley is a perfect example. The roof construction for mortarless valleys is similar to that for open grp valleys. How to do a roof valley martin s roofing and guttering merton ltd for all your roofing needs.

The first is the pitch of the roof. To get the most out of it is helpful to also read parts 1 and 2. Then i use a construction calculator to find the correct length of each rafter. 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 make the blind valleys we attached sleepers to the shed roof locating them by placing a 14 foot straightedge that is usually used for screeding concrete on top of the porch rafters to project the plane of the new porch roof over to the surface of the existing shed roof.