Guide to Roofing Underlayment: Unveiling the Key to a Durable Roof System


As your trusted source for roofing knowledge, we aim to provide you with an in-depth look at one of the most crucial, yet often overlooked, components of a high-quality roof system: the Roofing Underlayment. This guide is designed to help homeowners, architects, and even Winnipeg roofing companies to understand and make informed decisions about the best underlayment for a durable and long-lasting roof.


Roofing Underlayment


Overview of Roofing Underlayment

Roofing underlayment, also referred to as “felt paper” or “ice and water shield,” is a critical part of any roof installation. It’s the barrier that protects the roof deck from water intrusion if the top layer suffers damage, contributing to the overall durability and lifespan of the roofing system.

Importance of Roofing Underlayment

The roofing underlayment serves several critical purposes:

The Three Primary Types of Roofing Underlayment

There are three primary types of roofing underlayment: Asphalt-Saturated Felt, Rubberized Asphalt, and Non-Bitumen Synthetics. Each type has its unique characteristics, advantages, and disadvantages.

1. Asphalt-Saturated Felt

Often referred to as “felt paper,” asphalt-saturated felt is a traditional choice that has been used for many decades.



2. Rubberized Asphalt

Rubberized asphalt is a high-quality type of underlayment that involves the use of rubber polymers and asphalt, providing superior waterproofing properties.



3. Non-Bitumen Synthetics

Non-Bitumen Synthetics is a modern type of underlayment made from durable plastics such as polyethylene or polypropylene, displaying exceptional strength, elasticity, and waterproofing.



Winnipeg Roofing

Factors to Consider When Choosing Roofing Underlayment

When choosing your underlayment, several factors need to be considered:

Winnipeg Roofing Companies and Roofing Underlayment

Winnipeg roofing companies understand the importance of selecting the right roofing underlayment. They can provide professional advice and installation services to ensure your roofing system is durable and long-lasting



While managing your roof’s upkeep on your own is possible, it can present challenges, especially for those new to this task. Thus, for a thorough roof inspection, repair, or replacement, it’s advisable to seek the expertise of a professional roofing company in your vicinity.

Kenava Roofing stands ready to assist with all your roofing needs in Winnipeg. Our skilled team is equipped to address any roofing challenges, regardless of the season.

We’re committed to providing you with the best roofing solutions that align with your budget. Additionally, we offer complimentary estimates to ensure you’re well-informed before any work begins.

For any roof repair or replacement inquiries in Winnipeg and surrounding areas of Manitoba, don’t hesitate to contact us at (431) 887-5574 or send an email to Our team is available around the clock to respond to all your roofing concerns.

Frequently Asked Questions

In this section, we address some common queries about roofing underlayment.

What is the purpose of roof underlayment?

The purpose of roof underlayment is to act as a protective layer against wind-driven rain and snow, preventing water damage to the roof deck. It also provides a smooth surface for the roof covering and enhances fire resistance.

What are the different types of roof underlayment?

The three primary types of roof underlayment are asphalt-saturated felt, rubberized asphalt, and non-bitumen synthetics.

Which type of underlayment is best for my roof?

The best underlayment for your roof depends on your specific needs and budget. Asphalt-saturated felt is a cost-effective option providing good protection. Non-bitumen synthetics offer more durability and resistance to various elements but are more expensive. If you live in a particularly wet climate, rubberized asphalt may be the best bet due to its superior waterproofing.

How long does roof underlayment last?

The lifespan of roof underlayment depends on the material and the conditions it’s exposed to. Generally, it should last as long as your roofing material. For example, if you have a 30-year shingle roof, your underlayment should also last around 30 years.

In conclusion, roofing underlayment is a crucial component that ensures the durability and longevity of your roof. Whether you choose asphalt-saturated felt, rubberized asphalt, or non-bitumen synthetics, remember that the quality of the underlayment directly impacts the overall performance of your roof. Always consult with trusted Winnipeg roofing companies to make sure you choose the right underlayment for your specific needs and budget.


1: What is the role of Roofing Underlayment in a roof system?

– Roofing Underlayment is a critical part of any roof installation. It serves as a barrier that protects the roof deck from water intrusion if the top layer suffers damage. It also enhances fire resistance, provides a smooth surface for roof covering installation, seals around the flashing, and improves the overall sound insulation of the home.

2: What are the three primary types of Roofing Underlayment?

The three primary types of Roofing Underlayment are:
– Asphalt-Saturated Felt: Traditional, cost-effective, and provides good moisture resistance.
– Rubberized Asphalt:  High-quality, waterproof, and flexible, but more expensive and requires professional installation.
– Non-Bitumen Synthetics:  Modern, highly durable, resistant to mold and UV rays, but pricier and requires skilled installation.

3: What factors should be considered when choosing Roofing Underlayment?

When choosing Roofing Underlayment, consider the following factors:
–  Climate: The local climate significantly affects the durability and efficiency of the underlayment.
–  Water Resistance: The underlayment’s ability to resist water infiltration is crucial.
–  Durability: The lifespan of the underlayment should match that of the roofing material.
–  Top Roof Layer Material: The compatibility of the underlayment with the top roof layer material.
–  Cost: The overall cost, including the price of the underlayment and installation, must fit within your budget.

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