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How Much Does Flat Roof Replacement Cost In Pennsylvania?

Posted on : June 14, 2024

How Much Does Flat Roof Replacement Cost In Pennsylvania?

Flat roofs are common among commercial and residential buildings in Pennsylvania. Unfortunately, even with the aesthetics and functionality flat roofs offer, they won’t last forever. Ultimately, you’ll need to replace them after a certain period. But how much does it cost to replace a flat roof in Pennsylvania?

We will answer this question and more in this blog post. 

Average Cost of a Flat Roof Replacement in Pennsylvania

The simple answer is that, on average, a flat roof replacement costs between $4.50 and $8 per square foot in Pennsylvania.

Here is a brief flat roof replacement cost table with general estimates:

Flat Roof Average Cost Ranges
Low End$3,000 to $7,000
Average$7,000 to $14,000
High End$14,000 to $20,000

On average, property owners pay around $9,000 for a flat roof replacement in Pennsylvania, including labor and materials.

Note: Prices listed here are estimates and can vary due to factors like local labor costs in Pennsylvania and material quality. Please note these figures may not represent the final cost of your specific project.

Major Factors That Influence The Cost Of Your Flat Roof Replacement In Pennsylvania

Depending on certain factors, the overall flat roof replacement cost for your building can differ. Let’s take a look at these factors and how they affect the overall cost to replace a flat roof. 

#1 Material

The material you choose for your flat roof replacement will significantly impact the overall cost. Some common materials used for flat roofs include:

Built-Up Roofs

    Cost: $4 to $11 per square foot.

    Built-Up Roofs

    These are roofs made by layering alternating plies of reinforced fabric and hot-applied asphalt or coal tar pitch. They are very durable and come with a lifespan of up to 30 years. 

    Polyvinyl Chloride (PVC) 

      Cost: $4 to $7 per square foot.

      PVC Roof

      PVC roofs are single-ply membranes that are heat-welded together. They are energy-efficient and resistant to chemicals, fire, and high winds. 

      Ethylene Propylene Diene Monomer (EPDM)

        Cost: $4 to $13 per square foot.

        EPDM Roof

        EPDM is a synthetic rubber roofing membrane that is durable and weather-resistant. It is one of the most affordable flat roof options. 


          Cost: $4 to $8 per square foot.

          Concrete is a very sturdy and long-lasting material for flat roofs. It requires proper drainage and insulation to prevent cracking. 

          Modified Bitumen 

            Cost: $4 to $8 per square foot.

            Modified Bitumen Roof

            These roofs consist of asphalt that is modified with plastics or rubber for added strength and flexibility. They are installed with a torch or cold adhesive. 


              Cost: $4 to $35 per square foot.

              Roofs made from metals like steel and aluminum are very durable and energy-efficient. They can last 40-70 years but are more expensive than some other options. 

              Glass-Reinforced Polyester/Fiberglass 

                Cost: $4 to $6 per square foot.

                These roofs are made of fiberglass mats coated with polyester resins. They are lightweight yet strong and can mimic the look of other roofing materials. 


                  Cost: $4 to $8 per square foot. 

                  Polyurethane is a liquid-applied seamless membrane that becomes a solid, durable, and waterproof surface when cured. It can be used on various types of roofs. 

                  #2  Size of the Roof

                  The size of your roof is another factor that affects your overall flat roof replacement cost. A 500-square foot roof can cost anywhere between $1,500 and $7,000 depending on the material. On the other hand, a 2,500-square foot roof can cost you anywhere between $7,500 to $30,000. For an exact estimate, consider getting a custom quote from contractors in your area. 

                  #3 Type Of The Roof

                  This is another factor influencing the overall cost of a flat roof replacement. There are different types of flat roofs that serve different requirements. 

                  Cold Roofs 

                    ($3 - $9 per square foot)

                    For cold roofs, the insulating material goes underneath the roof deck, tucked between the joists or rafters. 

                    Warm Roofs 

                      ($6 - $11 per square foot)  

                      Warm roof designs position the insulation layer on top of the roof deck itself. This approach creates an even temperature across the deck and interior space below.

                      Inverted Roofs 

                        ($4 - $9 per square foot)

                        Inverted roofs flip the typical order - a waterproof membrane goes down first, then the insulation sits on top of that outer layer. This protects against harsh or unpredictable weather.

                        Hybrid Roofs 

                          ($4 - $11 per square foot)

                          As a combination, hybrid roofs incorporate insulation both above and below the roof deck for enhanced thermal performance.

                          Green Roofs 

                            ($10 - $30 per square foot)

                            Green roofs are covered with a layer of living vegetation like plants or grasses. This eco-friendly choice aids drainage while adding some greenery to the building.  

                            Tapered Roofs 

                            ($7 - $10 per square foot)  

                            Tapered roofs intentionally slope and use insulation of differing thicknesses to facilitate proper drainage and prevent standing water.

                            #4 Disposal or Removal of Old Roof Material

                            You can expect to pay between $1 and $5 for every square foot of roof area that needs to be cleared off. For example, if your roof covers an area of 1,500 square feet, the removal cost could range from $1,500 to $9,000. 

                            The exact price depends on certain things:

                            • The type of roofing material currently installed (EPDM, modified bitumen, metal, etc.).
                            • Total layers of old roofing materials that need to be stripped away.
                            • The complexity of accessing your roof for the workers.

                            The more layers and the harder your roof is to reach, the more expensive the removal process will be. That's because the roofing crew needs more time and effort to do the job.

                            #5 Underlayment and Insulation

                            The type of underlayment and insulation used can affect the overall cost of replacing a flat roof. Proper underlayment and insulation are crucial for energy efficiency and protecting the roof. The average cost for underlayment and insulation ranges from $0.50 to $4.50 per square foot.

                            #6 Ventilation and Drainage

                            Proper ventilation and drainage systems are essential for a flat roof to prevent moisture buildup and extend its lifespan. Depending on the size and complexity of the roof, installing vents, drains, and other drainage components can increase the overall cost by $350 to $1,100 on average. 

                            Also Read: 5 Common Challenges with Flat Roofs In Pittsburgh and How to Tackle Them

                            Call Mcclellands Contracting And Roofing For Flat Roof Replacement In Pittsburgh, PA

                            If you are looking for a flat roof replacement for your property in Pittsburgh, PA, or the nearby areas, we are here to assist you. At McClellands Contracting and Roofing, we have a dedicated team of expert roofers who will make sure your roof is replaced flawlessly and efficiently. To know more about us or to get a custom quote for your project, call us today at (413) 353-5660.

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