Guide to a commercial roof inspection

​A Comprehensive Guide to Commercial Roof Inspection: Insights from Motor City Roofers in Detroit, Michigan
As a business owner or property manager, maintaining the structural integrity of your commercial building is essential to protecting your assets and minimizing costly repairs. One of the most critical parts of your building is its roof, which takes on the brunt of weather exposure and environmental wear. Routine commercial roof inspections are essential to identify problems early, prevent significant damage, and extend the roof's lifespan.
At Motor City Roofers, we specialize in commercial roofing services in Detroit, Michigan, where varying weather patterns—from summer heatwaves to harsh winter snow—can impact roof durability. This guide will walk you through the essentials of commercial roof inspections, offering a checklist of items to examine and insights into why regular inspections are a smart investment for any commercial property.

Why Commercial Roof Inspections Are Important
A commercial roof is constantly exposed to the elements, from rain and snow to UV rays and high winds. Over time, these conditions can cause damage that may go unnoticed without regular inspections. Here are some reasons why inspecting your commercial roof is crucial:

1. Prevent Costly Repairs: Routine inspections help catch minor issues before they escalate into significant problems that require extensive repairs or even a full replacement.
2. Prolong Roof Lifespan: Regular maintenance and inspections can extend the life of your roof, saving you money in the long run by postponing replacement.
3. Energy Efficiency: A well-maintained roof ensures your building stays energy-efficient, reducing heating and cooling costs.
4. Maintain Aesthetic Appeal: Regular inspections help keep your roof looking good, contributing to the building's overall appeal.
5. Compliance with Warranty Requirements: Many roofing warranties require regular inspections and maintenance to remain valid. Failing to inspect your roof could void your warranty.

How Often Should You Inspect Your Commercial Roof?
At Motor City Roofers, we recommend inspecting your commercial roof at least twice a year—ideally in the spring and fall. Seasonal inspections help you address issues that arise due to extreme weather. Additionally, it’s wise to conduct inspections after severe storms, high winds, or heavy snowfall, as these events can cause sudden damage.
Essential Tools for a Commercial Roof InspectionA thorough commercial roof inspection requires a few key tools:

• Ladder (for safe access)
• Binoculars (to inspect hard-to-reach areas)
• Infrared camera (to detect moisture)
• Flashlight (for interior inspections)
• Notepad or inspection software (to document findings)
• Tape measure (to assess damage size)
• Digital camera (to take photos for records)

Key Areas to Inspect
A comprehensive roof inspection covers multiple areas and components. Here’s a checklist of the most crucial aspects to examine:

1. Roof Membrane
The roof membrane is the topmost layer of your roof and serves as the primary barrier against water. Common issues with the membrane include cracks, punctures, blisters, and seam separations. Over time, exposure to UV rays and temperature fluctuations can degrade the membrane, causing it to lose its protective qualities.
Inspect the membrane for any signs of wear and tear, and ensure there are no loose or damaged sections. Even small punctures or cracks can allow water to seep through, leading to interior damage and mold growth.

2. Flashing
Flashing is used around roof penetrations, edges, and corners to prevent water from entering. Loose, corroded, or damaged flashing can compromise the roof’s waterproofing. During the inspection, examine all flashing for cracks, rust, or lifting. Pay special attention to areas around vents, skylights, chimneys, and HVAC units, as these are common sites for flashing failure.

3. Drains and Gutters
An effective drainage system is essential for keeping water from pooling on your roof. Clogged or damaged drains and gutters can lead to ponding water, which puts undue stress on the roof and can cause structural damage. Check all drains, downspouts, and gutters for debris, cracks, or blockages. Ensure water flows freely through the drainage system.

4. Roof Penetrations
Roof penetrations, such as vents, pipes, and HVAC units, create weak points on the roof. Inspect these areas for signs of wear, as well as any gaps or holes that could allow water to enter. Make sure the seals around each penetration are intact and that there is no evidence of rust or corrosion.

5. Interior Ceilings and Walls
A roof inspection should include an interior assessment of the building. Check ceilings and walls for water stains, mold, or peeling paint, which could indicate a leak. If you find any signs of moisture or water damage, trace them back to the roof to determine the source of the issue.

6. Seams and Joints
Roof seams and joints are vulnerable areas that can develop leaks if not properly maintained. Inspect all seams for separations, gaps, or other signs of failure. If you notice any loose or open seams, repair them promptly to prevent water infiltration.

7. Signs of Ponding Water
Flat commercial roofs are particularly susceptible to ponding water, which occurs when water pools on the roof instead of draining. Prolonged ponding can lead to membrane damage, structural strain, and accelerated deterioration. Look for depressions or areas where water has collected. If ponding is a recurring problem, consider implementing additional drainage solutions.

8. Roof Surface Conditions
Inspect the overall condition of the roof surface. Look for signs of general wear, including fading, granule loss (if applicable), and damage caused by UV exposure. Also, check for loose or damaged roofing material that may need repair or replacement.

9. Parapet Walls and Copings
Parapet walls are common on commercial buildings, especially those with flat roofs. Inspect these walls and their copings (protective coverings on top of parapets) for cracks, loose material, and signs of water damage. Damaged parapet walls can lead to water infiltration, compromising the entire roofing system.

10. Previous Repairs
If your roof has undergone any previous repairs, check these areas to ensure they’re still intact. Repairs that were not completed correctly or have deteriorated over time can become weak points in the roof and cause additional problems.

Documenting Your Inspection
Proper documentation is critical to a successful roof inspection. Motor City Roofers recommends creating a checklist of all the areas inspected, taking photos of any issues found, and recording detailed notes. Digital tools and inspection software can help streamline this process and make it easier to track issues over time. Good documentation also supports warranty claims and helps plan maintenance schedules.

When to Call a Professional
While property owners or managers can conduct basic visual inspections, certain aspects of a roof inspection require expertise and specialized equipment. If you notice significant damage, suspect moisture intrusion, or have concerns about the roof’s structural integrity, it’s best to contact a professional roofing contractor. A licensed roofing professional, like those at Motor City Roofers, can conduct a thorough inspection, identify potential issues, and provide expert recommendations.

Regular commercial roof inspections are a proactive measure to maintain the longevity and performance of your roofing system. By catching small issues before they become major problems, inspections can save you money, extend your roof’s life, and protect your building’s interior from damage. For Detroit business owners, partnering with a reputable roofing contractor, such as Motor City Roofers, ensures your roof stays in optimal condition year-round.  Whether it’s a seasonal check-up or a post-storm assessment, a comprehensive inspection plan is crucial for preserving your investment and ensuring the safety of your commercial property.