Underlayment types vary
Traditional felt and synthetic products differ in weight, handling, exposure limits, and manufacturer requirements.
Ice and water protection
Some roofs and climates may require or benefit from self-adhered membranes at specific areas such as eaves, valleys, or penetrations, subject to code and system requirements.
Ask for the product specification
A written estimate should identify the type of underlayment rather than simply stating that underlayment is included.
Compatibility matters
The selected underlayment should be appropriate for the finished roofing material and installation system.
Roofing Help USA note: This site focuses on roof replacement and new roof installation. It does not present Roofing Help USA as the contractor performing the work.
Related Roofing Help USA guides:
Asphalt vs. Metal vs. Tile Roofing • Architectural vs. 3-Tab Shingles • Impact-Resistant Roofing Guide