The answer to 'types of underlayment' is that there are several common types of roofing underlayment that homeowners can choose from. The most popular options include asphalt-saturated felt paper, synthetic underlayment, and ice and water shield. Felt paper is a traditional and affordable choice, while synthetic underlayments offer improved water resistance and durability. Ice and water shield is a specialized product used to protect against ice dams and water infiltration in vulnerable areas like eaves and valleys.
The type of underlayment you choose will depend on your local climate, roof slope, and the type of roofing material you're using. In general, synthetic and ice and water shield products provide better protection, but they may also cost more than felt paper. Consulting with a professional roofer can help you determine the best underlayment option for your home.