EPDM (Ethylene Propylene Diene Monomer) Roofs
EPDM is a synthetic rubber roofing membrane widely used in commercial buildings. Its dark surface can attract and hold a lot of heat, leading to faster growth of moss and algae. EPDM roofs are durable but require specific cleaning methods to avoid causing damage.
High-pressure washing can damage the membrane, leading to leaks and other problems. A soft wash or low-pressure wash is usually the best cleaning method for this roof type. Considering the specialized care required and the cleaning solutions used, you should expect to pay between $350 and $700 to clean an EPDM roof.
PVC (Polyvinyl Chloride) Roofs
PVC roofs are known for their durability and resistance to moisture, fire, wind, and chemicals. Like EPDM roofs, they also require care when cleaning. While they can handle a wider range of cleaning methods than other roofs, a high-pressure wash can damage the seams and cause leaks.
Most professional roof cleaners will use a soft wash or low-pressure wash method on PVC roofs, as these provide a thorough clean without risking damage to the roof. The average cost for cleaning a PVC roof falls within the range of $300 to $700.
Number of Storeys
The height of your building is another factor that significantly impacts the cost of roof cleaning. The higher the building, the more risk involved and the more equipment and labor required for the job.
A single-story commercial building may cost between $200 and $500 to have the roof cleaned. However, for a two-story building, the cost can increase to $300 – $800. For buildings with three or more stories, you could look at costs of $500 and upwards, depending on the other factors discussed earlier.
The labor costs will differ based on the complexity of your roof cleaning project. For instance, steep roofs, tar and gravel roofs, or roofs with solar panels will require more labor and thus cost more.
The labor cost for professional roof cleaning is typically the most substantial overall cost. This labor includes the actual cleaning and the time spent assessing the roof, preparing the area (including protecting landscaping and other parts of your property), setting up the necessary equipment, and doing a final rinse and cleanup.
Roof cleaners usually charge per square foot because the size of the roof largely determines the amount of time and effort needed for the cleaning process. For most cleaning methods, labor costs can range from $0.20 to $0.60 per square foot.
However, these costs can increase for roofs with a steeper pitch or complex features, such as chimneys or skylights, which can complicate the cleaning process. For example, a particularly steep roof might raise labor costs to between $0.70 and $1.20 per square foot due to the additional safety measures and time required.
In some cases, additional services like gutter cleaning or moss prevention treatment might be included in the labor cost. However, other companies might charge extra for these services. For instance, gutter cleaning costs can range from $0.50 to $1.50 per linear foot, depending on the complexity and accessibility of the gutters.
It’s important to note that while choosing the company with the lowest labor costs might be tempting, it’s not always the best choice. When deciding who to hire for your roof cleaning project, consider the company’s experience, reputation, and whether they are licensed and insured.