A Roof Built to Last: Why Every Layer of the Roofing System Matters

At first glance, a roof may appear to be nothing more than the shingles on top. But when the layers are peeled back, it becomes clear that a roof is a carefully coordinated system designed to function together to protect a home. When one part fails, the entire system becomes vulnerable. Understanding what makes up this system helps explain how roofs perform and why proper installation matters.

Here is a breakdown of the important elements that make up a roofing system and why each one matters.

At the base of every roof installation is the roof deck. Typically made of plywood or oriented strand board (OSB), it serves as the structural foundation that supports all other roofing components. For the roofing system to perform as intended, the deck must remain strong and dry. During every roof replacement, the roofing contractors at Eyles Contracting Inc. carefully evaluate the decking to ensure it can safely support new materials.

A leak barrier, also known as ice and water shield, is installed directly on the decking in areas most susceptible to moisture intrusion. Living in colder climates like Massachusetts, this layer plays a critical role in protecting against ice dams. Ice dams form when heat escaping from a home melts roof snow that refreezes at the eaves, allowing water to back up beneath shingles and cause leaks and structural damage. This added layer of protection provides a protective barrier in areas where water is most likely to collect.

Once leak barriers are in place, roof deck protection is installed over the remaining decking. This layer acts as a secondary moisture barrier beneath the shingles. Roof deck protection is another layer that helps shield the decking from water infiltration caused by heavy rain and melting snow. While not visible once the roof is complete, this layer plays a key role in the long-term durability of the roofing system during a professional roof installation.

Starter strip shingles are a crucial part of the roof installation process. Installed along the roof’s eaves, they seal the initial row of shingles to the roof, which protects the vulnerable edges. This step helps prevent wind-driven rain from getting beneath the shingles and sets the stage for proper shingle alignment in the next step of installation.

The star of the show is, of course, the architectural shingles. Shingles serve as the home’s primary defense against rain, snow, wind, and UV exposure. Many homeowners choose architectural shingles for their durability, affordability, and reliable performance in New England’s unpredictable weather. Plus, a wide range of styles and colors allows homeowners to choose a style that best suits their home.

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