RoofPRO Installs CertainTeed XT25 Weathered Wood Shingles on an Elkridge, MD Home

How RoofPRO Traced a Ceiling Leak to a Single Misplaced Nail on an Elkridge, MD Townhouse

When an Elkridge, MD homeowner noticed a water stain forming in the middle of their ceiling, the cause wasn’t obvious from inside the home. It took a full inspection from the attic to the roof surface to uncover the culprit: a single nail placed too low on a shingle, left exposed to the elements long enough to allow water to work its way through the roof structure. Discover how RoofPRO identified the source, upgraded every layer of the affected area, and finished the job with CertainTeed XT25 Weathered Wood shingles.

What Problem Did the Homeowner Face?

The leak in this Elkridge townhouse showed up as a water stain in the middle of the ceiling, but the source was far from obvious. An attic inspection revealed wet and damaged OSB decking in the middle of a plywood panel, pointing to a very specific location on the roof above. On the roof surface, RoofPRO found the cause: a nail that had been placed too low on a shingle during the original installation. Rather than being hidden beneath the overlapping shingle above it, the nail was exposed directly to rain and moisture, creating a slow entry point for water that eventually worked its way through the decking and into the home.

How Did RoofPRO Solve the Problem?

RoofPRO removed the shingles in the affected area down to the decking to address every compromised layer. The work on this 4×4 section included:

• Full inspection of the leak path, from the ceiling stain through the attic to the roof surface, to pinpoint the source before any work began.
• Removal of the damaged OSB decking and replacement with half-inch CDX plywood, a higher-grade material.
• Installation of new plywood clips to ensure proper spacing and structural integrity between panels.
• Installation of ice and water shield underlayment, a significant upgrade over standard felt paper that provides a stronger, self-adhering barrier against water intrusion.
• Installation of new CertainTeed XT25 Weathered Wood shingles to complete the weathertight assembly.

What Made CertainTeed XT25 Weathered Wood Shingles the Right Fit for This Home?

The existing shingles on the townhouse were already CertainTeed XT25 in Weathered Wood. Using the same product meant the repaired section blended seamlessly with the surrounding roof, with no visible difference in color or profile. Matching the existing shingle exactly is important both aesthetically and practically, ensuring the repaired area performs consistently with the rest of the roof system.

How Did This Project Help the Homeowner Reduce Risk and Long-Term Costs?

By tracing the leak to its true source rather than simply replacing shingles on the surface, RoofPRO delivered a fix built to last:

• Eliminated the failure point: The misplaced nail and surrounding damaged materials were fully removed and replaced, not patched over or caulked.
• Upgraded the full assembly: CDX plywood, plywood clips, and ice and water shield underlayment replaced budget materials, reducing the risk of future moisture damage.
• Protected the interior: Addressing the source stops the kind of slow, hidden water damage that leads to mold, structural deterioration, and costly ceiling and drywall repairs.
• Long-term value: Every layer installed, from decking to shingle, now exceeds the original builder-grade standard.

Could Your Home Have the Same Problem?

A nail placed too low on a shingle is a workmanship error, not something you can spot from the ground or even from inside your home. There is no visible sign of the problem until water has already been working its way through the roof structure for months. If you are seeing any staining on ceilings or in your attic, scheduling a roof repair inspection is worth doing before the damage spreads further.