Why Roof Underlayment is Crucial for Ottawa’s Homes

Roof Underlayment Ottawa

Protecting your home from Ottawa’s unpredictable climate is crucial, and the key lies in the right roofing materials. This article dives into the significance of roof underlayment and ice and watershield, essential components that safeguard your home against potential weather damage. By the end, you’ll understand their distinct roles, signs of deterioration, and the trusted brands recommended by Tailored Home Improvements. Discover how these components can extend your roof’s lifespan, improve energy efficiency, and why they are indispensable for Ottawa residents.


  • Importance of Roof Underlayment: Roof underlayment acts as a vital protective layer between the roof covering and deck, offering a barrier against various potential damages. While traditional felt paper has been a standard, synthetic underlayment is gaining traction due to its improved durability and weather resistance. Additionally, this underlayment plays a pivotal role in insulation, ensuring energy efficiency by moderating temperature fluctuations inside homes.
  • Role of Roof Ice and Watershield: Given Ottawa’s severe climate, the Roof Ice and Watershield emerges as an essential protective component against snow and ice. This shield effectively prevents water damage from melting snow or ice dams, safeguarding the structural integrity of homes. For optimal protection, roofing experts suggest its deployment in areas with heavy snowfall or frequent ice dam occurrences.
  • Difference Between Roof Underlayment & Ice and Watershield: Both roof underlayment and ice and watershield are integral to roof protection but serve distinct roles. The former offers broad moisture protection, while the latter specializes in countering snow and ice accumulation. Especially in Ottawa’s intense winters, the superior waterproofing attributes of ice and watershield, stemming from its rubberized asphalt composition, are crucial.
  • Signs of Failing Materials: Detecting signs of deteriorating roofing materials is paramount for maintaining roof integrity. Common indicators for underlayment issues include indoor water stains, and anomalies in shingles such as curling or lifting. For the ice & watershield, icicle formation along eaves, ice dams, or leaks after heavy precipitation events can signal potential issues.
  • Trusted Brands in Ottawa: In Ottawa’s roofing market, certain brands stand out for their quality and reliability. Brands like Owens Corning Rhino Roof and GAF Feltbuster are renowned for their superior roofing underlayment that offers robust protection against various weather adversities. For ice and watershield needs, Resisto 65 emerges as a top choice, known for its durable, multi-layered membranes that effectively combat water infiltration.

What is Roof Underlayment?

Roof underlayment is a crucial component of any roofing system. It acts as a protective layer between the roof covering and the roof deck, providing an additional barrier against moisture, wind, and other potential sources of damage.

Think of it as the unsung hero that keeps your roof in top shape! One important thing to note is that there are different types of underlayment available in the market.

Traditional felt paper has been widely used for many years. It offers basic protection and is relatively affordable.

Synthetic Roofing Underlayment

However, synthetic underlayment has gained popularity in recent times due to its enhanced durability and weather resistance. Underlayment serves multiple purposes beyond just protecting your roof.

It also helps with insulation by minimizing heat loss during colder months and heat gain during warmer months. This can contribute to improved energy efficiency within your home.

When it comes to installing or repairing a roof, roofing contractors often recommend using high-quality underlayment materials to ensure long-lasting results. By investing in a reliable underlayment, you can significantly extend the lifespan of your roof.

Weatherproofing is another significant advantage offered by underlayment materials. They act as a shield against rainwater penetration into the sub-roof layers or decking, preventing potential rotting or structural damage over time.

What is Roof Ice and Watershield?

Roof Ice and Watershield is a crucial component when it comes to ensuring the durability and protection of your roof in Ottawa’s unforgiving climate. It is a specialized type of roofing underlayment that provides an extra layer of defence against the elements, particularly snow and ice.

Snow and ice protection are essential in Ottawa due to its long, cold winters. This protective barrier acts as a shield, preventing water from seeping through your roof decking and causing damage to the structure of your home.

Ice and Watershield Ottawa (Roof Underlayment Ottawa)

By effectively weatherproofing your roof, it helps to prevent leaks from melting snow or ice dams. Roofing contractors often recommend using Roof Ice and Watershield in areas prone to heavy snowfall or where ice dams are common.

It is typically installed along the eaves, valleys, and other vulnerable areas where water accumulation can occur. The material used in Roof Ice and Watershield is specifically designed to be highly resistant to water penetration, providing an added layer of insulation for energy efficiency.

This additional layer not only protects your roof but also extends its lifespan by preventing moisture damage that can lead to rotting or decay of roofing materials. It also aids in maintaining a comfortable indoor environment by keeping out drafts caused by cold air infiltration.

When considering roofing services or planning for roof maintenance, it’s important to consult with professionals who understand the unique challenges posed by Ottawa’s climate. They can educate you on the benefits of incorporating Roof Ice and Watershield into your roofing system while recommending trusted brands known for their quality and effectiveness in extreme weather conditions.

What is the Difference Between Roof Underlayment & Ice and Watershield?

Roof underlayment and ice and watershield are both essential components of a well-protected roof, but they serve different purposes. Roof underlayment, also known as roofing felt or tar paper, is a thin layer of material that is installed directly onto the roof decking before the final roofing materials are applied.

Its main function is to provide an extra layer of protection against water infiltration. On the other hand, ice and watershield is a more advanced product specifically designed to combat issues caused by snow and ice accumulation.

Ice and Watershield vs Underlayment for roofs Ottawa

It is a self-adhesive membrane that is installed in areas prone to ice damming, such as eaves, valleys, and low-slope sections of the roof. Its primary purpose is to prevent water from seeping into the underlying layers of the roof during freezing temperatures.

The key difference between these two materials lies in their composition and intended use. Roof underlayment typically consists of asphalt or synthetic materials that offer general protection against moisture infiltration.

Its installation provides an added layer of defence against leaks and assists in weatherproofing the roof. In contrast, ice and watershield boasts superior waterproofing characteristics due to its rubberized asphalt composition.

Ice and Watershield vs Underlayment for roofs Ottawa

This specialized membrane effectively seals around roofing nails and provides an impenetrable barrier against water intrusion even in extreme weather conditions. Although both roof underlayment and ice and watershield contribute to protecting your home from moisture-related issues, it’s important to understand their unique roles within Ottawa’s climate.

The harsh winters experienced in Ottawa make snow and ice protection vital for maintaining a structurally sound roof. By using both these materials strategically – with underlayment covering the entire roof area and ice and watershield applied selectively on vulnerable sections – homeowners can ensure maximum protection against potential leaks caused by freezing temperatures or heavy snowfall.

Signs of a Failing Underlayment and Ice & Watershield

The signs of a failing underlayment and ice & watershield are crucial to identify in order to ensure the integrity of your roof. In Ottawa, where the climate can be quite harsh, it’s important to be vigilant about any potential issues with these roofing materials.

One common sign of a failing underlayment is water stains on your ceiling or walls. If you notice any discolouration or water spots indoors, it could indicate that moisture is seeping through the underlayment and making its way into your living space.

Another telltale sign is if you spot any shingles that are curling or lifting up. This could mean that the underlayment beneath them has deteriorated and is no longer providing adequate protection.

Old Roof Underlayment

Similarly, if you see any missing shingles or granules collecting in your gutters, it might be a sign that the underlayment has failed and needs to be replaced. As for ice & watershield, some indicators of failure include icicles forming along the eaves of your roof or ice dams building up during winter months.

These issues can occur when the ice & watershield isn’t properly installed or if it has degraded over time. Additionally, if you notice leaks occurring after heavy rainstorms or snow melts, it’s possible that the ice & watershield isn’t effectively preventing water intrusion onto your roof decking.

It’s essential to address these signs promptly by contacting professional roofing contractors who specialize in Ottawa’s climate and have experience dealing with these specific roofing components. (Note: The style used here is casual and informal as specified.)

Popular Brands in Ottawa

When it comes to popular brands of roofing underlayment and ice and watershield in Ottawa, there are a few names that stand out in terms of quality and reliability.

One highly regarded brand is Owens Corning Rhino Roof, known for its durable and long-lasting underlayment. Rhino Roof offers a range of options designed to provide superior protection against moisture, wind, and extreme temperatures.

Their underlayments are known for their high tear resistance and water resistance properties, making them an ideal choice for the unpredictable Ottawa climate. Tailored Home Improvement’s recommends all Owens Corning roofing materials when replacing your residential roof. 

RhinoRoof® Granulated Self-Adhered Underlayment - Owens Corning® Roofing

Another popular brand in Ottawa is GAF Feltbuster. GAF is a well-established name in the roofing industry, offering a wide range of roofing materials including underlayments. The Feltbuster line from GAF is specifically engineered to provide exceptional protection against leaks and moisture infiltration.

Their underlayments are designed to be easily installed over roof decking, providing an extra layer of defence against water damage. With strong adhesive properties, GAF Feltbuster underlayments create a weatherproof barrier that helps extend the lifespan of roofs in Ottawa.

GAF Feltbuster Underlayment Ottawa

When it comes to ice and watershield products, Resisto 65 stands out as an excellent choice for Ottawa homeowners. Resisto 65 specializes in producing high-quality self-adhesive membranes that offer superior snow and ice protection.

Designed with multiple layers for maximum durability, Resisto 65 membranes act as a shield against water infiltration caused by ice dams or heavy rainstorms. With its excellent puncture resistance and UV stability properties, Resisto 65 provides long-lasting protection for roofs in the harsh Ottawa climate.

Rhino Roof Ice and Watershield Ottawa

Choosing the right brand for your roofing underlayment or ice and watershield is crucial to ensure the longevity of your roof and protect your home from potential damage caused by leaks or extreme weather conditions. It’s always recommended to consult with professional roofing contractors or experts who can guide you towards selecting the most suitable product based on your specific needs and budget requirements.


Investing in high-quality roof underlayment and ice and watershield is crucial for protecting your home in the unpredictable climate of Ottawa. These materials provide an extra layer of defence against harsh weather conditions, ensuring the longevity and durability of your roof.

With the right underlayment and ice and watershield, you can prevent water infiltration, ice dam formation, and other potential roofing issues that can compromise the structural integrity of your home. Roof underlayment acts as a barrier between the roofing materials and the roof decking.

It provides insulation, improves energy efficiency, and acts as a weatherproofing agent by preventing moisture from seeping into your home. On the other hand, ice and watershield is specifically designed to protect against snow accumulation and melting ice by creating a watertight seal.

Roof Underlayment Ottawa

Regularly inspecting for signs of a failing underlayment or ice and watershield is essential to catch any potential issues early on. By addressing these problems promptly with professional roofing services from reputable contractors in Ottawa who understand the unique needs of this climate, you can significantly extend the lifespan of your roof.

In addition to safeguarding your home’s structural integrity, an efficient roof underlayment system also enhances energy efficiency by providing better insulation properties. This optimizes temperature regulation inside your home while potentially reducing heating or cooling costs.

Tailored Home Improvements

Thank you for taking the time to read our article! If you are in Ottawa or the Ottawa Valley and are seeking roofing, attic insulation, eavestrough, or siding professionals, contact us for a free estimate and consultation.

If you are looking to see our completed projects, head over to our Instagram or Facebook page. Tailored Home Improvements is a trusted contractor in the Ottawa area with over 50 5-star views. Head over to our website homepage for more information.


Table of Contents

Our Social Media Accounts

Click on the icon below to check out our social media accounts!

Ottawa's Trusted Home Improvement Contractor

Are you in need of home improvements? Tailored Home Improvements is here to assist you! Contact us today for more information about our services or to request a free quote. We are dedicated to enhancing your home’s energy efficiency, comfort, and overall appeal.