Parkville Townhouse Roof Replacement Upgrades 20-Year-Old Roofing System

This Parkville Townhouse Roof Replacement Upgrades 20-Year-Old Roofing System project gave this aging townhouse a complete exterior upgrade with new CertainTeed Landmark PRO shingles in the bold Max Definition Coastal Blue color. After meeting the homeowner at the 2026 Maryland Home and Garden Show, the team at Roof Right completed a full roof replacement that addressed aging shingles, deteriorating flashing components, and outdated plank decking while dramatically improving the home’s curb appeal.

Project Overview: Parkville Townhouse Roof Replacement

When the homeowner scheduled their free estimate, our inspection revealed a roof showing many of the common signs associated with an aging asphalt roofing system. The existing shingles had reached the later stages of their lifespan, pipe collars had begun dry rotting from years of UV exposure, and the chimney flashing system was due for replacement to maintain reliable waterproofing protection.

While the roof was still functioning, several areas showed the kind of wear that can quickly develop into active leaks if left unaddressed. On older townhouse roofs throughout the Baltimore area, aging flashing components and deteriorated penetrations are often some of the first areas to become vulnerable during heavy rain and freeze-thaw cycles.

The homeowner wanted a roof system that would not only improve long-term protection, but also stand apart visually from the surrounding homes on the block.

Tear-Off & Decking Improvements

Once our crew began the tear-off process, we uncovered original plank decking beneath the existing shingles and tar paper. Older plank decking systems were common on homes built decades ago, but they can present challenges for modern roofing installations due to board spacing, movement over time, and uneven fastening surfaces.

Rather than installing the new roofing system directly over the aging planks, our team installed brand-new CDX plywood across the roof deck to create a stronger and more consistent foundation for the new shingles. Adding plywood over older plank decking helps improve fastener hold, overall roof stability, and long-term system performance.

With the new decking secured, our crew installed Ice and Water Shield in vulnerable areas of the roof before covering the remaining surface with modern synthetic underlayment. Compared to traditional felt paper, synthetic underlayment provides improved tear resistance, moisture protection, and durability during severe weather exposure.

Chimney Flashing & Waterproofing Upgrades

Because chimney areas are one of the most common leak points on older roofs, special attention was given to updating the flashing system during this Parkville roof replacement. Our crew installed new chimney flashing that was countersunk into the masonry and professionally sealed to help create a more durable waterproof barrier.

Properly integrated flashing plays a critical role in directing water away from roof penetrations and transition areas. Many older flashing systems begin failing long before the shingles themselves fully wear out, especially after years of seasonal expansion, contraction, and exposure to wind-driven rain.

CertainTeed Landmark PRO Coastal Blue Shingles

To complete this Parkville Townhouse Roof Replacement, the homeowner selected CertainTeed Landmark PRO shingles in the Max Definition Coastal Blue color. The Coastal Blue shingles immediately gave the townhouse a bold new appearance that separated it from the many black and gray roofs surrounding it.

In addition to the visual transformation, Landmark PRO shingles are designed with upgraded durability and dimensional appearance technologies that help maintain long-term curb appeal. Their Max Definition color blend creates greater depth and contrast across the roof surface, allowing the Coastal Blue color to stand out while complementing the home’s exterior.

The finished roof gave this Parkville townhouse both renewed weather protection and a distinctive appearance that completely changed the look of the property from the street.

Signs You May Need a Parkville Townhouse Roof Replacement

Asphalt roofing systems often show warning signs before major leaks develop. Homeowners should watch for issues such as:

• Curling or brittle shingles
• Granule loss
• Dry-rotted pipe collars
• Aging chimney flashing
• Missing shingles
• Frequent roof repairs
• Sagging or uneven roof areas
• Roofs approaching or exceeding 20 years old

Replacing an aging roof before widespread failure occurs can help prevent interior water damage and more costly structural repairs.

Protecting Parkville Homes with Professional Roof Replacements

A successful Parkville Townhouse Roof Replacement involves more than installing new shingles. Proper decking preparation, waterproofing details, flashing integration, and ventilation all play important roles in long-term roof performance. At Roof Right, our team works to provide Baltimore County homeowners with roofing systems designed for both durability and curb appeal. If your roof is showing signs of aging or storm wear, contact us by clicking the button below.