“Roof replacement” is a broad term. No two projects are exactly alike. Some roofs need basic shingle replacements, while others require entire rebuilds. In this discussion, we’ll review what roof decking is and how often it needs to be replaced.

What Is Roof Decking?

Roof decking is the flat layer of plywood or OSB that your roofing materials attach to. It provides a solid surface that spans the trusses and rafters. The deck panels are covered in an underlayment that creates a waterproof seal under the shingles. You cannot see your roof decking from the ground, but it acts as the foundation for your roof materials.

How Often Does Roof Decking Need to Be Replaced?

Your roof decking may last much longer than your roof shingles. This depends on several factors: how well it’s installed, how secure the underlayment is, how stable the overall roof is, etc. Assuming that you have properly installed decking and a roof that has been routinely repaired, your roof decking could last for decades.

Should I Replace Roof Decking When I Get New Shingles?

Water is a roof deck’s worst enemy. If you experienced a roof leak that sparked you to get new roofing, there’s a good chance you’ll need new decking. However, if the roof decking is still sturdy when you need a new roof, you may be able to keep it in place. This would save you time and money, but it is not ideal for every situation.

Your roof inspectors can help you decide if you should keep your roof decking or replace it. The general rule of thumb is to replace the decking if it is not sturdy enough to support the full lifespan of the new shingles. If it’s in great shape with minimal wear, you can probably keep it for at least one more roofing cycle.

Signs You May Need New Roof Decking

Here are some indicators that you should get new roof decking with your shingles:

• You’ve had roof leaks in the past, even if they were repaired.
• You can see stains or sagging areas on your roof.
• There is mold in the attic or on your ceiling.
• Your energy bills have gone up without explanation (a common sign of a roof leak).
• There are holes in the roof, usually from fallen limbs or debris.
• It feels unstable when you walk on your roof.

The best way to determine if you need new roof decking is with a detailed inspection from a roofing company. The experts know what to look for and how to best remedy the issues at hand. Contact a licensed and insured roofing company near you to find out what your options are.

Get a Roof Inspection and Replacement Estimate from McLean Roofing and Siding

McLean Roofing and Siding offers comprehensive roof replacement services, including new roof decking and shingles. Our phone number is (248) 524-1111. Give us a call to schedule your in-person consultation. We service Macomb County, Oakland County, and Wayne County MI.