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Signs of a Bad Roofing Job (How to Avoid It Happening to You)


Roofing contractors have earned a less-than-stellar reputation, and it's not entirely undeserved. As a roofing company ourselves, we understand the frustration homeowners feel when they've been taken advantage of by unscrupulous contractors. The truth is, it can be difficult to spot a bad roofing job, and even harder to avoid it altogether. That's why it's important to do your research and choose a reputable contractor with a proven track record of quality work and customer satisfaction.


JNR Roofing is a team of experienced roofing contractors who are dedicated to helping homeowners navigate the often confusing and overwhelming world of roofing. We believe that education is key, which is why we want to share with you the signs of a bad roofing job and what it could mean for your roof investment. Whether you're currently dealing with a bad roofing job or preparing for a future roof replacement, these signs will help you avoid costly mistakes. So without further ado, here are five signs of a bad roofing job to watch out for.


1. Your new roof leaks after the first rain

The first sign of a bad roofing job is that your roof leaks after the first rain. But this sign isn’t necessarily like the others.


Even the best roofing companies can make mistakes during installation, such as improperly driven nails or inadequate flashing. However, a reputable roofing contractor will take responsibility for any issues and promptly fix them. If a company ignores your calls or refuses to take responsibility, it may be a sign of more widespread installation errors. In this case, you may need to find another company to repair your roof, which can be costly. Ultimately, the key is to pay attention to how the roofing company responds to any issues that arise after installation.


2. Your roof looks uneven and doesn’t have a uniform appearance

Our second sign also has to do with improper installation. But unlike the first one that has to do with leaks, this sign has to do with appearance.


If your roof appears uneven or has a bumpy, wavy look, it may be a sign of a bad roofing job. This could be due to improperly driven nails, cutting corners, or lazy workmanship during installation. A reputable roofing company will come out to fix the problem and ensure that your roof is properly installed. It's important to address this issue as it could lead to leaks and other problems down the road. Don't hesitate to contact a professional roofing contractor to ensure that your roof is in good shape.


3. Crucial roofing components were left off during installation

A roof is more than just a layer of shingles. It is a complex system made up of various materials and components that work together to protect your home from the elements. A poorly installed roof can lead to leaks, water damage, and other costly problems. That's why it's important to ensure that all the necessary materials and components are included in your roof system, from the underlayment and flashing to the ventilation and insulation.


The main materials and components that make up a roof are:

  • Roof decking

  • Roof flashing

  • Underlayment

  • Drip Edge

  • Ice & Water Shield

  • The roofing material you choose

  • Ridge capping

  • Roof vents

  • Pipe boots

When it comes to getting a new roof, it's important to make sure that all necessary materials and components are included in the job. Unfortunately, some roofing contractors may cut corners or leave off certain items in order to lower their prices and win your business. This can lead to problems down the road and a poorly done roofing job. To avoid this, it's crucial to carefully review your estimate with your roofing contractor and ensure that all necessary materials are included. Don't be afraid to ask questions and clarify any concerns before signing on for the job.


4. Your attic isn’t ventilated properly

Proper roof ventilation is essential for the longevity of your roof. When hot and cold air becomes trapped in the attic, it can cause damage to the roof over time. Signs of a poorly done roofing job include inadequate ventilation in the attic. This can lead to the deterioration of adhesives in the decking and cause shingles to crack or curl due to the heat. It's important to ensure that your roof has proper ventilation to avoid these issues.


Proper attic ventilation is crucial for maintaining the integrity of your roof. Without it, trapped air can cause condensation and damage to your roof's decking, resulting in a wavy appearance. To prevent this from happening, it's important to have your roofing contractor inspect your attic and assess its current ventilation system. Be sure to ask them about their process for checking attic ventilation during the inspection.


5. The roofing contractor didn’t change out rotten roof decking

Roof decking is the wooden foundation for your entire roof system. When getting a roof replacement, your roofing contractor should check the integrity of the wooden boards and for any rotten decking.



A good roofing contractor will always assess the condition of your decking before installing new materials. If they find that the wood is rotten or compromised, they will replace it to ensure the stability and safety of your roof. Neglecting to replace damaged decking can lead to sagging and even health hazards from mold and mildew. However, it's important to note that the extent of necessary decking replacement can only be determined after the old roof is torn off. To avoid any surprises, homeowners should ask their contractor about their protocol for handling rotten decking. As long as the contractor communicates with you and takes necessary measures to replace damaged decking, your roof should be in good hands.


Avoid a bad roofing job by hiring a great roofing contractor

When it comes to getting a new roof, it's important to choose the right roofing contractor. Unfortunately, there are many companies out there that will do a poor job or even take advantage of you. To avoid this, it's important to do your research and read reviews before hiring a contractor. Additionally, when meeting with potential contractors, be sure to ask the right questions to ensure they are reputable and will do quality work. By taking these steps, you can avoid the common signs of a bad roofing job and have peace of mind knowing your roof is in good hands.


Looking for a reliable roofing company in Chesterfield? Look no further than JNR Roofing in Chesterfield! With years of experience and a commitment to quality workmanship, our team has helped countless homeowners in Chesterfield and the surrounding Macomb, Oakland and St. Clair County areas with their roofing needs. Plus, we stand behind our work with a lifetime warranty for added peace of mind. Contact us today to learn more about our services and how we can help you protect your home.

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