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Commercial Roof Replacement: Contractors, Systems & Factors

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Commercial roof replacement refers to the process of completely removing the existing roof system of a commercial building and installing a new roofing system in its place. It involves the removal of all old roofing materials, including the roof membrane, insulation, and any underlying layers, and the installation of a new roof system that meets the building's requirements and industry standards. Commercial roof replacement is typically done when the existing roof has reached the end of its lifespan, suffered significant damage, or no longer provides adequate protection.

How Do You Know If A Commercial Roof Replacement Is Required?

Determining if a commercial roof replacement is required involves considering several factors:

  1. Age of the Roof: If the roof is approaching or has exceeded its expected lifespan, it may be time for a replacement. Most commercial roofs have a lifespan of 20 to 30 years, depending on the materials used.
  2. Extensive Damage: If the roof has suffered severe damage, such as extensive leaks, sagging, or significant structural issues, repairs may no longer be sufficient, and a replacement may be necessary.
  3. Repeated Repairs: If the roof requires frequent repairs or ongoing maintenance to address issues, it could indicate that the overall condition of the roof is deteriorating, making a replacement more cost-effective in the long run.
  4. Energy Efficiency Concerns: An outdated roof system that lacks proper insulation or energy-efficient features may lead to high energy bills. Upgrading to a more energy-efficient roofing system can provide long-term cost savings and improved thermal performance.
  5. Roofing Material Obsolescence: If the roofing material used is outdated or no longer supported by manufacturers, finding replacement parts or conducting repairs may become challenging, making a roof replacement a more viable option.

It is recommended to consult with a professional roofing contractor or inspector who can assess the roof's condition and provide expert advice on whether a replacement is necessary based on the specific circumstances and requirements of the commercial building.

What Is The Lifespan Of A Commercial Roof?

The lifespan of a commercial roof can vary depending on factors such as the roofing material, installation quality, climate conditions, maintenance practices, and overall wear and tear. Here are some general lifespan ranges for common commercial roofing materials:

  1. Built-Up Roofing (BUR): 15 to 30 years
  2. Single-Ply Membrane (EPDM, TPO, PVC): 20 to 30 years
  3. Modified Bitumen: 20 to 30 years
  4. Metal Roofing: 30 to 50+ years
  5. Mastic Asphalt: 30 to 50+ years
  6. GRP/Fibreglass: 25 to 40 years
  7. Liquid Polyurethane: 25 to 40 years

Please note that these are approximate lifespan ranges, and actual longevity can be influenced by various factors. Regular inspections, proper maintenance, and timely repairs are essential to maximize the lifespan of a commercial roof.

Does Insurance Cover Commercial Roof Replacement?

Whether insurance covers commercial roof replacement depends on the specific terms and conditions of the insurance policy. In some cases, insurance may cover roof replacement if the damage is caused by covered perils such as storms, fire, or vandalism. However, it is important to review the insurance policy, consult with the insurance provider, and document the extent of the damage to determine if the replacement is eligible for coverage. Factors such as the age and condition of the roof may also impact the coverage determination.

What Are The Steps For A Commercial Flat Roof Replacement?

The steps involved in a commercial flat roof replacement typically include the following:

  1. Inspection and Assessment: A professional roofing contractor inspects the existing roof to assess its condition, identify any underlying issues, and determine the appropriate replacement approach.
  2. Planning and Preparation: A detailed plan is created, including considerations for materials, budget, timeline, and any necessary permits or approvals. The area around the roof is prepared, ensuring safety measures are in place.
  3. Removal of Existing Roofing: The old roofing materials, including the membrane, insulation, and any underlying layers, are carefully removed and disposed of following local regulations.
  4. Repairs and Modifications: Any underlying structural issues or damage to the roof deck are repaired, and modifications such as adding insulation or improving drainage may be made at this stage.
  5. Installation of New Roofing System: The new roofing system, including the membrane, insulation, and other components specific to the chosen roofing material, is installed according to manufacturer guidelines and industry best practices.
  6. Finishing and Cleanup: The roof is inspected for quality and waterproofing, and any necessary finishing touches are completed. The work area is cleaned up, and debris is removed from the premises.
  7. Final Inspection and Maintenance: A final inspection is conducted to ensure the replacement meets quality standards and adheres to local building codes. Maintenance recommendations are provided to ensure the longevity and performance of the new roof.

What Are The Steps For A TPO Roof Replacement?

The steps for a TPO roof replacement typically involve inspection and assessment of the existing TPO roof, planning and preparation, removal of the old TPO membrane, installation of a new TPO membrane adhering to manufacturer guidelines, and final inspection to ensure a successful and watertight replacement.

What Are The Steps For A Commercial Metal Roof Replacement?

The steps involved in a commercial metal roof replacement typically include the following:

  1. Inspection and Assessment: A professional roofing contractor inspects the existing metal roof to evaluate its condition, identify any underlying issues, and determine the necessary replacement approach.
  2. Planning and Preparation: A detailed plan is developed, considering factors such as materials, budget, timeline, and necessary permits or approvals. Safety measures are implemented, and the surrounding area is prepared for the replacement.
  3. Removal of Existing Roofing: The old metal roof panels or sheets are carefully removed and disposed of, adhering to local regulations. Any underlying structural repairs or modifications are made as needed.
  4. Installation of New Metal Roofing: The new metal roof panels or sheets are installed, following manufacturer guidelines and industry best practices. Proper fastening techniques and weatherproofing measures are employed to ensure a secure and watertight roof system.
  5. Flashing and Trim Installation: Flashing and trim elements, such as ridge caps, drip edges, and sidewall flashing, are installed to provide additional protection against water infiltration and enhance the roof's aesthetics.
  6. Final Inspection and Cleanup: A thorough inspection is conducted to ensure the quality and integrity of the new metal roof. The work area is cleaned up, and debris is removed from the premises.
  7. Maintenance and Warranty: The roofing contractor may provide maintenance recommendations to preserve the longevity and performance of the new metal roof. Manufacturers' warranties on the roofing materials may also be available, providing coverage for a specified period.

What Are The Steps For A Factory Roof Replacement?

The steps for a metal factory roof replacement typically involve inspection and assessment of the existing metal roof, planning and preparation, removal of the old metal roof panels or sheets, installation of new metal roof panels or sheets, and final inspection and cleanup to ensure a successful replacement with a durable metal roofing system tailored to the factory's needs.

What Are The Steps For A Warehouse Roof Replacement?

The steps for a metal warehouse roof replacement typically involve inspection and assessment of the existing metal roof, planning and preparation, removal of the old metal roof panels or sheets, installation of new metal roof panels or sheets suitable for warehouse applications, and final inspection and cleanup to ensure a seamless and long-lasting replacement of the warehouse roof.

Does My Choice Of Contractor Matter When Replacing A Commercial Roof?


Yes, the choice of contractor matters when replacing a commercial roof. A reputable and experienced contractor will have the necessary expertise, knowledge, and resources to ensure proper installation and minimize potential issues. They can provide quality workmanship, use high-quality materials, adhere to industry standards, and offer warranties or guarantees, ultimately ensuring a successful and long-lasting roof replacement. Conversely, choosing an inexperienced or unreliable contractor may lead to subpar work, potential delays, and increased risks of future problems.

Are There Contractors Who Are Roof Replacement Specialists?

Yes, there are contractors who specialize in roof replacements. These specialists have extensive experience, knowledge, and expertise in the specific process of replacing roofs, allowing them to efficiently handle the complexities of the job and deliver high-quality results.

How Do You Find A Commercial Roof Replacement Contractor?

Finding a commercial roof replacement contractor can be done by conducting thorough research and considering multiple factors. Start by seeking recommendations from trusted sources such as other businesses or industry professionals. Look for contractors with relevant experience, proper licensing and insurance, positive reviews, and a track record of successful projects. Obtain multiple quotes, interview potential contractors, and request references to assess their credibility and determine if they are the right fit for your specific roof replacement needs.

What Is The Best System For A Commercial Roof Replacement?

A quality liquid polyurethane is the best system for commercial roof replacements in most cases. This is due to the ease of installing liquid roofing systems. This reduces contractor risk, the ability to be cold applied, ability to seal around complex details and its elasticity allowing it to deal with thermal movement. However, the best system will differ from roof to roof. A commercial roof replacement depends on various factors, including the specific needs of the building, budget considerations, and local climate conditions. Other common options for commercial roof replacements include single-ply membranes such as TPO, PVC, or EPDM, as well as modified bitumen systems or metal roofing. Each system has its own advantages and considerations, so it is important to consult with a knowledgeable roofing professional to determine the best system based on the unique requirements of the commercial building.

How Long Will A Commercial Roof Replacement Last?

The lifespan of a commercial roof replacement can vary depending on several factors, including the type of roofing system, quality of installation. The implementation of regular commercial roof maintenance and environmental conditions. Generally, a well-installed and properly maintained commercial roof replacement can last anywhere from 20 to 50 years or more.

How Can You Maximise The Lifespan Of A Commercial Roof Replacement?

To maximise the lifespan of a commercial roof replacement, it is essential to implement regular inspections and maintenance. Promptly address any issues or repairs. Ensure proper drainage and ventilation, and follow manufacturer's guidelines for maintenance and care. Additionally, working with a reputable roofing professional and using high-quality materials can contribute to the longevity of the roof.

What Type Of Commercial Roof Replacement Is Easiest To Apply?

Single-ply membrane systems, such as TPO, PVC, EPDM, and liquid polyurethane, are generally considered the easiest to apply for a commercial roof replacement due to their flexibility, lightweight nature, and straightforward installation process. However, the specific ease of application may vary depending on the expertise of the roofing contractor and the unique characteristics of the building.

What Is The Best System For A Commercial Roof Replacement To Endure Heavy Use?

For heavy use in commercial applications, a durable and robust roofing system such as a built-up roof (BUR) or a modified bitumen system is often considered the best choice. These systems are known for their strength, resilience, and ability to withstand heavy foot traffic and other demanding conditions, making them suitable for high-traffic areas or roofs subject to frequent maintenance activities.

Do Commercial Roof Replacements Come With Guarantees?

Yes, commercial roof replacements often come with guarantees or warranties. The specific terms and coverage can vary depending on the contractor and the type of roofing system installed. It is important to carefully review and understand the details of the guarantee or warranty provided by the roofing contractor to ensure proper protection and recourse in case of any issues or defects with the roof replacement.

Need Help With A Commercial Roof Replacement?

If you would like a quotation or any advice regarding a commercial roof replacement please get in touch with using our contact form or call us now on 01277 375 511. One of our experienced team of commercial roofing experts will be happy to help.