Title: Install roof underlayment.
Course: Carpentry II (17003-II) > Section: Installing Roofing

Installation should include

- identifying types of underlayment
- keeping the underlayment taut, with two-inch horizontal overlaps
- fastening according to local building code and manufacturer specifications.

Process/Skill Questions:

- What is the function of roof underlayment (i.e., roof felt)?
- What are problems associated with improperly installed roof felt?

NCCER Carpentry
General Carpentry, Module 27112 Roof Framing describes the most common roof types and introduces basic roof framing components. Includes instructions for laying out rafters for gable roofs, hip roofs, and valley intersections. Covers stick-built and truss-built roofs, and includes the basics of roof sheathing installation.