How to Shingle a Reverse Gable

Rolled Roofing Valley

• 1

  Apply the 15# felt paper to the roof planes, overlapping the valley. Staple the felt to the roof using the hammer stapler.

• 2

  Lay a single layer of 90# roofing material down center of the valley, from the peak of the roof to the roof edge. Press the rolled roofing into the seam between the roof planes, and nail it in place.

• 3

  Place nails on the rolled roofing 12 inches or more away from the valley, so the nails are covered by the roof shingles.

• 4

  Apply the shingles to the individual roof planes, overlapping the shingles over the rolled roofing by 12 to 14 inches on each roof plane. Install the shingles to only one roof plane at a time. Do not nail down the end of the shingle that overlaps the valley.

• 5

  Snap a straight line, using the chalk line, from the roof peak to the roof edge that is 4 inches out of the roof valley's center line. Cut each shingle which overlaps the valley by hand to create a straight line which leaves the rolled roofing exposed on each of the roof planes.

• 6

  Apply a dab of plastic roof cement under the ends of the shingles which overlap the rolled roofing to seal the singles down.

Overlapping Valley

• 7

  Apply the shingles according to the manufacturers instructions, Starting with the smaller roof plane. Begin the installation from the edge of the roof, and work your way up the roof plane.

• 8

  Lay the shingles through the valley, and overlap them onto the adjacent roof plane. Make sure you place the shingles so more than half of the shingle overlaps the valley onto the adjacent roof plane. Press each shingle into the valley, and nail these shingles into place, making sure the nails are at least 10 inches away from the valley

• 9

  Snap a chalk line from the peak to the roof edge, over the shingles which are installed overlapping the valley. Snap the line so it is in the center of the valley, directly over the intersecting line of the two wood roof planes.

• 10

  Begin roofing the second roof plane by laying a shingle so -it overlaps the shingles installed on the first roof plane, and overlap the valley as well. Lay each shingle into place without nailing it. Line it up with the chalk line, and mark the shingle by cutting a small notch in the top and bottom edge that line up with the chalk line.

• 11

  Turn the shingle over and cut it on an angle using your two marks as a guide. Asphalt and fiberglass shingles cut more easily if you score the back side of the shingle, and then bend and break off the cut end on your scored line. Turn the shingle back over so it is right side up, and line up your cut edge with the chalk line in the valley. Nail the shingle in place. By following this method, you will create a straight line which visually runs up the center of the valley.