The Role of Underlayment in Roofing Systems

Underlayment: The Unsung Hero of Your Roofing Systemflat roof

At Thunder Bay Roofing, we understand the critical role that underlayment plays in a reliable roofing system. This often-overlooked component is a secondary barrier against water intrusion, managing moisture, and providing an additional layer of insulation. 

By prioritizing the proper selection and installation of underlayment, our Edgewater roofing contractors ensure that your roof remains durable and long-lasting. If you’re ready to take proactive steps toward protecting your home, call 410-956-7663 to schedule a consultation with the knowledgeable team at our Maryland roofing company.

What is Roof Underlayment?

Roof underlayment is a protective layer installed between the roof deck and the primary roofing material. It serves as a crucial component of a well-designed roofing system, offering essential functions that contribute to the performance and longevity of your roof.

Functions of Roof Underlayment

Water Protection

Roof underlayment acts as a secondary barrier, creating an extra layer of defense that catches any water that penetrates the shingles. This helps prevent leaks and water damage to your roof deck and the interior of your home.

Moisture Management

Moisture can build up underneath your roof due to condensation, rain, or snow. Roof underlayment, especially breathable underlayment types, allows proper ventilation by creating an air gap between the shingles and the roof deck. This helps moisture escape, preventing problems like rot or mold growth.

Thermal Insulation

Roof underlayment can add another layer of insulation to your roof system, depending on the material. This can help improve your home’s energy efficiency by keeping it cooler in the summer and warmer in the winter. Better efficiency translates to lower energy bills and increased comfort throughout the year.

Types of Roof Underlayment

Asphalt-Saturated Felt

Asphalt felt is the most budget-friendly option for underlayment. It’s also lightweight and familiar, and felt is relatively simple to install. On the downside, felt underlayment has a shorter lifespan compared to other options, typically lasting 10 to 15 years. Felt can also absorb moisture over time, reducing its effectiveness and potentially leading to rot.

Synthetic Underlayment

Made from advanced materials like polypropylene, synthetic underlayment offers superior strength and a longer lifespan (20 to 50 years). Synthetic underlayment also excels at repelling water, providing enhanced protection against leaks. On the downside, synthetic underlayment comes at a higher price point compared to felt.

Rubberized Asphalt Underlayment

Rubberized asphalt underlayment features a rubberized asphalt layer that automatically seals around fasteners, creating a watertight barrier. Similar to synthetic underlayment, it also offers excellent protection against water infiltration. On the downside, rubberized asphalt underlayment is the most expensive option on this list.

Factors to Consider When Choosing Underlayment

Climate and Weather Conditions

  • Hot and Humid Climates: Prioritize breathability to prevent moisture buildup. Synthetic underlayment might be a good choice.
  • Cold and Snowy Climates: Focus on water resistance and durability. Rubberized asphalt underlayment could be ideal.
  • High Wind Areas: Durability and tear resistance are key. Synthetic underlayment or a reinforced felt option might be suitable.
  • Roof Pitch and Slope: Steeper roofs require a higher level of water resistance. Rubberized asphalt underlayment or certain synthetic underlayments excel here.
  • Type of Roofing Material:  Different roof materials, like metal or slate, may have specific underlayment compatibility requirements. 

Consult the Maryland roofing professionals at Thunder Bay Roofing for recommendations based on your chosen roofing material.

Peace of Mind Starts with a Strong Foundation: Schedule a Free Underlayment Consultation with Thunder Bay Roofing! 

At Thunder Bay Roofing, our team of experienced Maryland roofing professionals is dedicated to helping you create a durable and efficient roofing system. We offer comprehensive underlayment services, from selecting the appropriate type to ensuring proper installation. 

Trust our expertise to guide you through the process and ensure your roof’s long-term performance. Call 410-956-7663 today to schedule a consultation and take the first step toward a reliable and well-protected roof.