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Laying Shingles in Roof Valleys

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The following step-by-step instructions can make your shingle project easier. Take a few minutes to read the instructions carefully before starting, and you can save time, money and effort while completing a better job.

Tools & Materials Needed:

  • Shingles
  • Hammer
  • Carpenter's Apron
  • #15 Felt Roofing
  • Ridge Shingles
  • Asphalt Roofing Cement
  • Copper or Aluminum Flashing Material
  • Soft Soled Shoes
  • Level
  • Clean-up Cloth
  • Roofing Nails
  • Chalk Line
  • #90 Mineral Surface Roofing
  • Tin Snaps
  • Ladder
  • Work Gloves
  • Safety Rope
  • Hand Cleaner

 

  1. A roof valley is formed where two roofs join at an angle. You must be careful when shingling in this area - an improperly laid roof valley can easily develop leaks.


  2. Valleys should be covered with a mineral-surfaced, roll roofing material (Fig. 1).


  3. Place an 18" wide strip or metal flashing down the center of the valley, from the eaves to the top of the ridge.


  4. Nail this material down on the outer edges only, making sure that it stays flat in the valley.


  5. Place roofing cement along each edge.


  6. Next, lay a 36" wide strip of the roofing material down on top of the previous strip, and nail its outer edges.


  7. Snap two chalk lines down the edge of the valley. Start at the ridge, with the lines centered in the valley and 6" apart. As you move down the roof, spread the lines apart, about 1/8" per foot, down to the eaves.


  8. Now you're ready to apply shingles. Lay them down to the edge of the chalk lines, and cut them to fit (Fig. 2).


  9. Place the end of each shingle in roofing cement to seal it before nailing it into position.


  10. Do not nail shingles closer than 6" to the chalk lines.


Courtesy of the National Retail Hardware Association - www.nrha.org.




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