Cost of New Roof Installation


Commercial roof replacement is typically a two-step process. Remove the old roof, then install the new roof. Each step in the process has costs and hurdles associated with it. These costs can vary greatly depending on the size of the roof, the complexity of the roof, and other factors. The cost to install a new commercial roof depends largely on surface prep and the material used. Let’s look at the expected cost of new roof installation below.

New Roof Installation

Prepping the roof for a new roof can be a difficult process.

Surface Prep

Depending on the system you choose, the surface will have to be prepped in various ways. For single-ply roofs, ISO board must be installed to the roof deck prior to installing the single-ply membrane. This adds installation value to the roofing system, but takes additional time and money.

Metal roofs don’t require much prep work. They are many times installed with no installation underneath (which isn’t a good idea, but people do it). Metal roofs are installed directly to the roof deck.

For retrofit systems like spray foam and restoration coatings, prep work consists of cleaning the roof and repairing any major problems. Prep work for these two systems is very simple, like metal, and doesn’t require a lot of time or money.

Material in Use

The other major factor in the cost of new roof installation is the cost of the material you use. Metal panels aren’t extremely expensive, and they lie about in the middle of the road.

Most single-ply materials are less expensive than other systems, and present a great opportunity for saving money to building owners. The purchase of single-ply materials is rarely one with a lot of zeros.

Spray foam roofs offer some of the highest material costs around, because they are an extremely effective roofing material. Foam outperforms most other systems in most categories, and that is reflected in the price of the material. The labor for foam roofs is generally less expensive than metal or single-ply roofs, which allows for some cost recuperation there.

Restoration coatings, whether they be silicone, acrylic, or otherwise, offer less expensive material for roof replacement than all other systems. You simply cannot be the prices offered by restoration coatings, because they are so simple. You need a very thin layer of coating, they can be efficiently manufactured, and there are enough manufacturers that the price is fair. Restoration coatings offer extremely reasonable material costs.


If you’re looking to replace your commercial roof, the new roof installation may be the most expensive part of the project. Don’t overlook the cost of the material as a significant portion of the project, because it is important and can cost you a lot of money. Give us a call today if you’d like to learn more about replacing your commercial roof.

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