Install asphalt roof shingles in a valley.

Installation should include

• following the shingle manufacturer specifications
• ensuring that the shingle line is straight, even, and parallel to the valley
• nailing shingles, according to specifications, without nailing the flashing.

Process/Skill Questions:

• What are two common methods of installing asphalt roof shingles in a valley?
• What is the purpose of underlayment in a valley?

NCCER Carpentry Standards

Level Two, Module Five (27202-13): Roofing Applications

Module Five (27202-13) describes how to properly prepare the roof deck and install roofing for residential and commercial buildings.