5 Things That Can Affect The Cost Of A New Commercial Roof

Posted on: 18 May 2021

A commercial flat roof can last decades before it needs replacement. This means that roof requirements, along with the general condition of the support system, may lead to necessary upgrades. The following are a few things that can affect the cost of a new commercial roof installation.

1. Code Requirements

Building codes change over time to reflect updates to international codes, as well as changes in safety equipment and knowledge. Even outside forces, like climate change, can lead to new building requirements in terms of necessary snow load limits. Usually, existing roofs are grandfathered in and do not need to make changes immediately, but a new roof installation may need to be retrofitted to meet the updated codes.

2. Material Upgrades

There are likely some new roof systems available that hadn't yet been invented when your old roof was installed. New single-ply membrane systems and new membrane materials are much more durable than some of the older systems that were used on flat roofs. Upgrading to these newer systems may cost a bit more initially, but the increased durability and decreased maintenance needs can make it worthwhile.

3. Safety Fastener Systems

Older roofs may not have all the modern safety fasteners that help make them more secure, particularly in areas prone to high winds and hurricanes. Even if not required, it makes sense to upgrade your fastener system when installing a new roof because it will likely save you on future repair and replacement costs in the event of a major storm.

4. Drainage Improvements

Drainage is one of the main things that compromise the expected lifespan of a flat commercial roof. A new roof installation is the optimum time to update the drainage system on the roof, especially if you have had previous issues with ponding and water retention. Your roofer can install additional perimeter or internal drains, or they can grade the roof to slope better towards existing drains.

5. Sub-Roof Repairs

Some damages may not be visible until the old roof is torn off. Damage to the support structures and underlying decking, such as extensive water damage or rot, must be repaired before the new roof goes on. Don't be surprised if some damages are found, even if you had no evidence of internal leaks in your building.  The good news is that most modern roofing systems are less prone to leaks compared to older systems.

Contact a contractor to learn more about the costs associated with a new commercial roof.