Solidly Sheathed Decking: The Foundation of a Reliable Roof

A home with roof decking is shown as it is under repairs

When it comes to roofing, what lies beneath the shingles or roofing material is just as critical as what’s on top. We’re talking about the decking, the foundation that supports your roof.

In the past, many buildings, both residential and commercial, used nominal lumber like 1x4s or 1x6s as roof decking. While this method was cost-effective, it came with significant drawbacks. The gaps between the boards allowed for air, moisture, and even pests to infiltrate the roof structure. Over time, this could lead to rot, weakened structural integrity, and higher maintenance costs.

Modern building codes have recognized the importance of a solid foundation for roofing systems. That’s why they now require solidly sheathed decks made of materials like plywood or OSB (oriented strand board). These materials provide a continuous, stable surface that minimizes vulnerabilities.

Solidly sheathed decking offers better structural support, ensuring your roof can withstand the elements, including heavy snow loads and wind. Gaps in spaced decking can allow rain and moisture to seep through, leading to leaks and damage. Solid sheathing provides a reliable barrier against water infiltration. A solidly sheathed deck improves insulation and reduces energy loss through the roof, helping you maintain a comfortable indoor climate and lower energy bills.

Roofs with solid decking tend to have a longer lifespan, reducing the need for frequent repairs and replacements. If you are concerned about your roof and decking, call Centennial Roofing for an inspection today.

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