How Do You Build A Roof Valley

To do this we had to extend the plane of the shed roof out over the porch roof creating a small triangular extension of the existing roof.

How do you build a roof valley.

This roof valley is a perfect example. The bottom of our blind valley was about 30 inches short of the bottom of the porch roof so we extended the line of the valley down to the edge of the new roof. You can use a straight edge to achieve a straight cut. Soup to nuts riley shows the proper way of installing a valley on a roof.

Soup to nuts riley shows the proper way of installing a valley on a roof. When you reach the valley lay the shingles over the valley and trim the edges to the chalk line. Although this valley system isn t entirely new you won t find it described on shingle wrappers. Then enter those measurements into an online roofing calculator to determine how long each common rafter will need to be.

A roof valley is very prone to leaks especially if you have an older roof. Long island valley a young roofer from long island first showed me what i now call a long island valley. But it doesn t have to be. If you begin with accurate as built measurements and use a construction calculator to do the math you can cut all of the rafters for most roofs on the ground in just one shot.

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. Framing a complex roof is one of the trickiest parts of home building. The cut edge then is sealed with roof cement. To build a hip roof start by measuring the width and height of the building you re putting the roof on.

Masterrib is a 36 wide 5 r. Nail down each valley shingle at least two inches 50 mm back from the chalk line. Over driving nails is always a. Begin to install roof shingles on either roof face.

This valley looks the same as a cut valley only it s faster to install. No sales pitch or other fluff. Next once you know the lengths of the rafters cut some wooden planks to size and make birdsmouth cuts in each one so.