Critical Indicators of Substandard Asphalt Shingle Roof Installation

Critical Indicators of Substandard Asphalt Shingle Roof Installation

When it comes to protecting your home from the elements, the integrity of your roof is paramount. Asphalt shingle roofing, known for its durability, cost-effectiveness, and aesthetic appeal, is a popular choice among homeowners. However, the benefits of asphalt shingles can be compromised by subpar installation practices. At Skyview Exteriors in Providence, RHODE ISLAND, we emphasize the importance of recognizing the signs of inadequate installation to ensure your roof remains in optimal condition.

Misaligned Shingles

Proper alignment is crucial for the effective performance and visual symmetry of an Asphalt Shingle Roof. Misaligned shingles can lead to gaps and overlaps, compromising the roof’s ability to repel water. This misstep not only affects the roof’s aesthetic appeal but also its functionality, increasing the risk of leaks and water damage.

Inadequate Nailing

Shingles secured with too few nails or nails driven incorrectly (too high, low, or through the shingle) can lead to a host of problems, including increased susceptibility to wind uplift. The standard requires four to six nails per shingle, depending on the wind zone. Incorrect nailing practices can void manufacturer warranties and significantly shorten the lifespan of your roof.

Poor Shingle Overhang

The overhang of shingles at the roof’s edge is critical for directing water away from the roof deck and underlying components. An overhang that is too short may allow water to seep into the roof structure, while an overhang that is too long can lead to shingles being blown off by the wind. The optimal overhang is between 0.5 and 0.75 inches.

Incorrect Starter Strip Installation

The starter strip is essential for the first row of shingles to provide an additional layer of protection against wind uplift and water infiltration. Failure to properly install the starter strip can lead to premature failure of the roof’s edge, one of the most vulnerable areas to water damage.

Inadequate Ventilation

A well-ventilated attic is crucial for regulating temperature and moisture levels within the roof structure. Poor ventilation can lead to heat buildup, which accelerates the aging of shingles, and moisture accumulation, which can cause rot and mold growth. Proper ventilation involves a balance between intake and exhaust vents to ensure a continuous flow of air.


Recognizing the signs of poor asphalt shingle roofing installation is essential for maintaining the structural integrity and longevity of your roof. Misaligned shingles, inadequate nailing, improper shingle overhang, incorrect starter strip installation, and poor attic ventilation are key indicators that the installation may not meet industry standards. At Skyview Exteriors, we are committed to providing high-quality roofing services that adhere to the highest standards of workmanship and materials. If you suspect your asphalt shingle roof was not installed correctly, it’s crucial to consult with experienced professionals who can assess the situation and recommend the best course of action.