How Do You Build A Roof Valley

If doghouse dormers or shed dormers aren t dressy enough a dormers can add an exciting design note and they re easier to seal against the elements.

How do you build a roof valley. When the widths of the major and minor roofs are equal two valley rafters of equal length. Getting the rafters right. The valley rafter tie beams and joists will move the weight of the roof to the walls. You can build a valley rafter very simply.

The valley roof option is used to calculate valleys for 90 degree the heel height overhang and ridge and fascia boards for both roofs will be the same. 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. Things you ll need 2 in 10 in 5 1 cm 25 4 cm wooden beams laser distance measuring device plywood sheets carpenter s framing square round saw nails hammer ceiling joists asphalt shingles. Only nail at the edges with only enough nails to.

Then starting at the base of the. I then move the shingle to the uppermost course on the roof plane line up the mark on the shingle with the valley center and again mark the corner. Framing a dramatic dormer. Framing a roof valley.

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. Ensure ice and water protector has been installed along the valley first. Do the math on a calculator so that you can concentrate on what s important. To shingle out of the valley with laminated shingles lay a shingle down as a gauge and mark the corner at the bottom left and top right of the roof.

The valley rafter is marked for a 12 in 17 pitch and then cut with a double bevel to fit into the ridge intersection. Next you will need to use the wall plate to rest the rafters on.