Common Roofing Underlayment Types and Their Critical Functions


Understanding the Hidden Layer That Protects Your Home

While most homeowners focus on shingles when discussing roof installations, the underlayment plays a crucial role in protecting your home from moisture and weather damage. Today, we’ll explore the various types of roofing underlayment and their specific applications.

Types of Roofing Underlayment

1. Felt Underlayment
– Traditional 15# and 30# felt options
– Water-resistant but not waterproof
– Cost-effective solution
– Suitable for most residential applications

2. Synthetic Underlayment
– Enhanced tear resistance
– Lighter weight than traditional felt
– Superior water resistance
– UV-resistant properties
– Longer exposure rating

3. Rubberized Asphalt Underlayment
– Self-sealing around nails
– Complete waterproof barrier
– Excellent for ice dam protection
– Ideal for low-slope applications

Installation Considerations

Proper installation of underlayment requires careful attention to:
– Overlap measurements
– Proper fastening techniques
– Temperature conditions during installation
– Ventilation requirements
– Local building codes

Regional Requirements

In our service areas across New York and Pennsylvania, ice and water shield underlayment is particularly important due to our winter weather conditions. Local building codes often require this additional protection, especially in valleys and eaves where ice dams commonly form.

Professional Installation Matters

While underlayment selection is crucial, professional installation ensures your roof system functions as intended. Proper installation techniques and material choices work together to protect your home from moisture intrusion and weather-related damage for years to come.

Remember, the right underlayment choice depends on various factors, including roof pitch, local climate conditions, and budget considerations. Professional roofing contractors can help determine the best solution for your specific situation.