Underlayment: What Every PA Homeowner Should Know

Underlayment (also called roofing felt or synthetic underlayment) is the critical waterproofing layer between your roof deck and shingles. It provides a secondary barrier against water infiltration if shingles are damaged or wind-driven rain penetrates the primary surface. Modern synthetic underlayments are lighter, stronger, and more water-resistant than traditional 15- or 30-pound felt paper. In PA's heavy snow regions, ice and water shield (a self-adhering rubberized underlayment) is required along eaves and in valleys to prevent ice dam damage.

Understanding underlayment is important for homeowners in the Poconos and Lehigh Valley because Pennsylvania's climate puts unique demands on your home's exterior. With heavy snowfall, ice storms, and 80-120+ freeze-thaw cycles annually, the quality of your roofing directly impacts your home's protection and your family's comfort.

Amero Exteriors has been helping PA homeowners navigate these decisions since 2013, with 500+ completed projects across Monroe, Pike, Carbon, Lehigh, and Northampton counties.

Learn more about related topics:

• Ice and Water Shield: A self-adhering rubberized membrane installed in vulnerable roof areas to prevent ice dam leaks.
• Shingle: A flat, rectangular piece of roofing material laid in overlapping rows to cover a roof.