Should You Repair Your Damaged Roof Decking?

Exposure to severe weather elements like strong winds, heavy snow loads, driving rain, ultraviolet rays and sharp-hitting hail often contributes to the premature deterioration of roofing shingles. But the thing is, the problem does not end there. The decking — which is the structural component installed right underneath the shingles — also becomes vulnerable to damage. While a bit of a damaged decking might not seem like a pressing matter, it can lead to a series of structural issues and expensive repairs if left unaddressed for too long.

A roof replacement contractor discusses more here.

What Is Roof Decking?

On a roofing system, roof decking or sheathing refers to the layer of building materials located on top of the rafters and below the underlayment. Although it is not visible, it plays a crucial role in anchoring the shingles and the nails that hold them in place. Oriented strand board (OSB) and plywood are the most commonly used materials for roof decking in residential applications. In some cases, roof decking may be assembled with boards that are either connected with a tongue-and-groove joint or butted together.

Because roof decking binds and secures all the components of the roofing system together, it is extremely important to the structural integrity of a home. It needs to be strong and sturdy enough to support the weight of the shingles and at the same time flexible enough to give slightly under load. It also helps regulate the levels of moisture inside a home by keeping rain and snow out and allowing excess moisture to escape through the attic. The underlayment usually assists with ventilation and moisture protection.

How Does Roof Decking Get Damaged?

Most roofing systems, such as wood shingle and asphalt shingle roofs, are designed and built to last approximately 20 years, but the actual serviceable life ultimately depends on the materials used, quality of installation and local climate. 

When it comes to preserving the life of roof decking, there are a number of elements that you need to watch out for, one of which is snow accumulation. Damage can also occur in areas where shingles have blown off as a result of old age, UV deterioration, or high winds. Another common culprit behind roof decking damage is the installation of solar panels. Sure, utilizing solar power is an excellent way to cut down energy costs and reduce carbon footprint, but standard roof-mounted solar panels can be extremely heavy. If the roof is not able to effectively support the additional weight, it can cause roof decking to split or bend out of shape. The cost of restoring the damaged roof can cancel out some of the benefits of the solar panel installation.

Since roof decking is typically made from wood composites, it is also particularly susceptible to water damage when exposed to excess moisture or standing water for extended periods. Water can seep into a residential roof in many different ways. Cracked or missing shingles, overflowing gutters, torn flashing around the chimney, excessive humidity in the attic and poor roof ventilation can all allow moisture or water to affect the structural components of the roof and cause rotted decking.

What Are the Signs of Damaged Roof Decking?

You will need a roof repair and replacement expert to confirm whether or not your roof decking requires repairs, although there are a few easy-to-spot signs you can look out for without necessarily having to put yourself in harm’s way. These include:

• Roof leaks
• Visible holes in the roof
• Shingles wearing in a granular pattern
• Deterioration around fixtures on the roof
• Wet spots on ceilings
• Stains on interior walls
• Peeling wallpaper
• Mold and mildew in the attic
• A sagging roofline

A roof leak is a usual indication of a damaged roof deck. It can easily lead to water streaks or discoloration on ceilings and interior walls cracked paint or peeling wallpaper. A thorough inspection of the attic space, however, can uncover dark-colored stains in the insulation or on the rafters. If such damage is left undetected, traces of mold and mildew will likely form. A ray of light passing through the roof and into the attic is another symptom of a compromised structure. A roof that sinks in the middle also tells that the sheathing is most likely waterlogged due to water leakage.

Should Roof Decking Be Repaired or Replaced?

When a roof deck is affected by rot, a roof repair is simply not a feasible solution. Instead, it must be replaced along with the shingles. The longer you go without tearing off the sheathing that has been damaged, the more problems it can produce and the more expensive the repairs will be down the line. 

When you decide to replace the shingles and decking, consult your roofing contractor about the most up-to-date weatherproofing options for residential applications. A waterproof underlayment, for example, provides an extra layer of protection at the seams where the roofing structure is most vulnerable to ice and water damage. While a complete roof tear-off is a costly undertaking, it is certainly more cost-effective than having to replace stained drywall, waterlogged framing and damaged electrical wiring.

How Is Roof Decking Protected?

It is essential that you observe proper roof maintenance in order to protect the life of your roof deck along with other components of your home. Here are a few preventative measures that you can take:

• Clear your gutters and downspouts at least twice a year, once in the spring and once in the fall.
• Replace cracked, curling, or damaged shingles as needed. 
• Let a certified roofing contractor inspect your roofing system annually.

Let Professionals Handle All Your Roofing Needs!

Summit Roofing & Restoration, Inc. is a top-rated residential and commercial roofing contractor in Tennessee. Whether you need to repair a minor leak or tear off an aging or storm-damaged roof, our skilled team has the experience and expertise to deliver the great results you expect in no time and within budget. Give us a call at (731) 589-7663 (Dyersburg), (901) 430-1974 (Atoka) or (870) 736-7663 (Paragould). You may also fill out our online form to get in touch with one of our specialists.