What is the first step in the installation of strip shingles?

The first step in the installation of strip shingles is installing the underlayment. This layer serves as a protective barrier between the shingles and the roof deck. It helps prevent water infiltration and adds an extra layer of insulation. By providing this base, the underlayment not only protects the roof from moisture but also helps create a smooth surface for the shingles to adhere to, ensuring a more secure and effective installation.

Prior to installing shingles, it's crucial to prepare the roof deck by laying down the underlayment, as this sets up the necessary conditions for successful shingle application. The subsequent steps, such as measuring the roof and nailing the shingles, rely on having the underlayment properly installed first. This foundational step is essential for achieving a watertight and durable roofing system.