Request Commercial Property Estimate

When considering recovering a flat roof (also known as an overlay or re-roofing over an existing roof), there are several key factors to evaluate to ensure a successful and long-lasting solution. 

 
1. Condition of Existing Roof:
  • Thorough Inspection:

    A detailed inspection of the existing roof is crucial. Look for signs of damage, such as cracks, blisters, punctures, pooling water, loose seams, or signs of rot and mold. These indicators can reveal the extent of the existing roof’s deterioration and whether it’s suitable for an overlay.  Also, if you have 25% saturation, recover is not an option!  

     
  • Structural Integrity:

    Assess the roof’s structural integrity, including the roof deck and supporting joists. If the underlying structure is compromised, an overlay might not be the best solution, and a full replacement might be necessary. 

     
  • Drainage System:

    Check the functionality of the drainage system, including gutters, downspouts, and any internal drainage systems. Ensure water can flow freely off the roof to prevent ponding and potential leaks.  The biggest issue here is whether or not the roof slopes to drainage and if a Tapered Insulation system needs to be installed

     
  • Insulation:

    Evaluate the existing insulation’s condition and effectiveness. If it’s damaged or insufficient, consider incorporating new insulation during the overlay to improve energy efficiency.  Particularly if it is saturated.

     
2. Roof Type and Material:
  • Roof Type:

    Determine the type of flat roof you have, such as built-up roofing (BUR), modified bitumen, EPDM, or TPO. Understanding the existing material helps determine the compatibility of the overlay material and the best approach for the recovery installation 

     
  • Material Compatibility:

    Ensure the chosen overlay material is compatible with the existing roof. Certain materials may not bond well with others, or the weight of the overlay might exceed the existing roof’s load-bearing capacity. 

     
  • Durability and Lifespan:

    Consider the long-term durability and lifespan of the chosen overlay material. Factors like climate, exposure to UV rays, and the expected service life of the new material should be factored into the decision. 

     
    3. Cost and Budget:
  • Cost Comparison:

    Compare the cost of an overlay with a full roof replacement. Sometimes, a full tear-off and replacement might be more cost-effective in the long run, especially if the existing roof is in poor condition or requires significant repairs.  or consider a low cost roof coating instead.  

     
  • Material Costs:

    Obtain quotes for different overlay materials and factor in the cost of labor, disposal of old materials, and any necessary structural repairs. 

     
  • Long-Term Savings:

    Consider the potential long-term savings associated with an overlay, such as reduced labor costs and potentially extended roof lifespan. 

     
4. Building Usage and Requirements:
  • Building Use:

    Consider the building’s function and use. If it’s a commercial building with heavy foot traffic or a building with high moisture levels, the overlay material and installation method should be chosen to withstand these conditions. 

     
  • Moisture Concerns:

    If the building is prone to moisture buildup (e.g., a pool, manufacturing process, or refrigerated space), the overlay material should be chosen with moisture resistance and proper ventilation in mind. 

     
  • Energy Efficiency:

    Evaluate the insulation needs and consider adding or improving insulation during the overlay to enhance energy efficiency and reduce heating and cooling costs. 

     
    5. Environmental Considerations:
  • Sustainability:

    Consider the environmental impact of the chosen materials and installation process. Some materials are more sustainable and eco-friendly than others. 

     
  • Waste Management:

    Explore options for responsible disposal of the existing roofing materials. 

     
  • Water Runoff:

    Ensure the overlay material and installation method contribute to proper water runoff and minimize potential environmental impact. 

     
6. Professional Expertise:
  • Experienced Contractor:
    Engage a reputable and experienced roofing contractor specializing in flat roof recovery and overlays.  The advantage of utilizing GenSuns 3 decades of experience is that we have seen roofs performance on roofs we installed 30 years ago!  We can safely provide an honest assessment of what will work best in your situation
  • Consultations and Inspections:
    Seek consultations and thorough inspections from the contractor to assess the roof’s condition, discuss potential solutions, and obtain accurate quotes.
  • Warranty and Guarantees:

    Ensure the contractor provides a warranty or guarantee for the materials and installation work to protect your investment.  We are certified and can offer the best warranties

    By carefully considering these factors, you can make an informed decision about whether a flat roof overlay is the right solution for your needs and ensure a successful and long-lasting roof recovery.