Why is There Plywood Showing Through My Long Island Roof Shingles?

If you can see plywood through your Long Island roof shingles, you could have damage caused by wind uplift, a thermal seal failure, or plywood buckling.

It’s not just a cosmetic problem. Exposed plywood means that your home’s weatherproof barrier is compromised. If you see bare plywood on your rooftop, you can talk to Renew Roofing Solutions for a detailed roof inspection and repair.

Visible Plywood is a Critical Roofing Emergency

Seeing the wood deck of your roof is an emergency. In Long Island’s climate, it often starts from one of three specific mechanical failures:

• Wind Uplift or Shingle Tab Failure: Long Island sees intense winds, especially in exposed coastal areas. A common installation defect sees nails installed above the manufacturer’s specified nail line. Shingles lack the leverage to resist wind uplift in this case. Once a shingle rips away in the wind, more will follow in a zipper effect, exposing the plywood underneath.
• Thermal Seal Failure: Shingles feature a heat-activated bitumen strip that bonds each piece to the deck. The seal can sometimes fail, especially in areas with heavy sand and salt spray, like Southampton and Babylon. The extreme freeze-thaw cycle on Long Island can also compromise the seal.
• Plywood Buckling: In some cases, the plywood itself can bow upwards and push through the shingles. This could be due to an installation defect, especially if the installer didn’t use H-clips to allow the wood to expand and contract.

The above issues can be caused by undetected moisture, poor installation methods, low-quality shingle products, or even age. Your roof is more likely to fail if it is over 20 years old and should be replaced.

Whatever the underlying cause, Long Island licensed roofers are available to provide an accurate diagnosis and roof repairs to safeguard your home.

What Happens if You Ignore Exposed Plywood on Your Roof?

If you ignore a visible plywood roof deck, water damage and structural failure are the most likely outcomes.

• Roof Deck Delamination: Plywood is made up of bonded layers. When it gets wet, the adhesives dissolve, and the wood swells and delaminates. Roofing nails can pop out, leading to more lost shingles and broader exposure to the elements.
• Roof Rot: Consistent exposure to humidity, snow, or rain causes plywood to turn soft and spongy. Eventually, it won’t be able to support the weight of the roof, especially if it’s snowing. This can cause a catastrophic roofing failure.
• Mold Growth: When water penetrates the deck seams, it drips directly into the insulation. This reduces the R-value of the material and can cause mold growth. Significant leaks can cause visible water running through your ceiling or down your walls. In the most severe cases, this can ruin interior materials and compromise your home’s wood framing.

Pro Roofer Tip: Mold spreads quickly. Active spores in the insulation or attic can enter your finished living spaces within days. Moldy insulation is less effective, so if it goes undetected, it can increase your heating and cooling costs. Mold remediation is expensive. Addressing an exposed roof deck early is crucial.

Roof Repair vs. New Roof Installation – Practical Advice from Your Long Island Roofing Contractor

Visible plywood is a sign of a severe roofing failure. The next step is determining whether you should get a roof repair or a new roof installation.

• Single Shingle Missing: If you catch this early, it needs only a spot repair. It‘s often caused by strong Nor’easters, and the roof repair is straightforward if the wood is dry.
• Sagging Roof Deck: A section replacement is often necessary to restore the roof deck’s structural integrity. Usually needs at least one 4×8 sheet replacement and H-clip installation with new shingles.
• Widespread Blow-Off: This is a case for a full roof replacement. This is often covered by insurance and/or the roofing warranty if it is caused by improper installation or a natural event.

Renew Roofing Solutions is available for your roof inspection anywhere on Long Island. We will identify the damage, recommend a repair or replacement, and proceed with the work once you’re happy with the details. Don’t wait for your roof to fail. Call a licensed roofer at 516-212-0307 or 914-415-7702 today.