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What You Need To Know About Flat Roof Replacement Costs

You feel a bit proud — you have a roof replacement plan, you and your company have been diligent in saving for the new roof, and you already have financing arranged. Question is, what are commercial roof replacement costs? What factors affect the final invoice?

Roof Type

Commercial roofs are constructed in two main types:

  1. Low-slope or “flat” — any roof that is less than 3-in-12 pitch; the vast majority of commercial properties are this type of roof
  2. Steep-slope — any roof that is 3-in-12 or greater in pitch; commercial properties meant to mimic residences make up the majority of this type

Low-slope roofs are perfect candidates for economical, tried-and-true solutions like Modified Bitumen (Mod Bit) or Built Up Roofing (BUR).

Also great, especially with the high heat of Alabama, are premium roofing materials. Consider the durability of Thermoplastic Polyolefin (TPO) single-ply roofing membrane and ethylene propylene diene terpolymer (EPDM).

Roof Access

Tear-off and disposal is easier on a one-story roof convenient to a parking lot than on a 15-story office building in the middle of a busy downtown. You pay additional costs for added height, awkward material storage locations, and challenging access points.

If you have concerns over customer and employee inconvenience, you may pay a premium for weekend or after-hours roofing work.

Roof Structure

Your building’s roof deck needs to be in good shape for an effective reroof or roof replacement. The deck may be concrete, metal, or wood, and may need some attention. This might only be revealed during tear-off and add to your costs.

Substrate layers such as cover board and insulation must be inspected after tear-off. To provide the best possible new roof, all issues with those substrates must be addressed, which could add to the bottom line.

Wind Loads

Good commercial roofers consider wind loads when determining mechanical fastener locations. Alabama is challenged by both tornadoes and hurricanes. Be willing to pay a little extra for peace of mind when the next high winds hit.


Alabama building codes evolve to counter new risks. Consult with your commercial roofer to make certain you are fully protected with the latest hurricane codes. Getting up to date could add to your final costs.

For local, reliable, professional assistance with commercial roof replacement, contact us at Yellowhammer Roofing, Inc. We stand ready to have your roof ready for anything Mother Nature can throw at it, at the lowest reasonable cost!

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