When it comes to commercial roofing, selecting the right material is crucial for ensuring long-term durability, energy efficiency, and cost-effectiveness. Among the popular options are Spray Polyurethane Foam (SPF) roofing and Built-Up Roofing (BUR). Each roofing system has its distinct advantages and disadvantages, making it essential to understand their differences before making an informed decision.
| Feature | Spray Foam Roofing (SPF) | Built-Up Roofing (BUR) |
| Energy Efficiency | High – Excellent insulation reduces heating and cooling costs | Moderate – Less insulation compared to SPF |
| Installation | Time-consuming, heavy, may require additional structural support | |
| Seamless and Leak Resistance | Seamless application minimizes risk of leaks | Multiple layers with seams and joints can lead to leaks |
| Durability | 20-25 years with proper maintenance, requires re-coating every 5-10 years | 20-30 years, low maintenance, gravel layer adds durability |
| Cost | Higher upfront cost, but energy savings may offset | Typically lower initial cost, but heavy installation can increase expenses |
| UV and Fire Resistance | Requires elastomeric coating for UV protection | High – Gravel or reflective coating provides UV and fire resistance |
| Maintenance | Requires periodic re-coating | Low maintenance, occasional checks for gravel distribution |
| Versatility | Can be applied to various roof shapes and sizes, ideal for complex designs | Suitable for flat or low-slope roofs |
| Weight | Lightweight, does not stress the building structure | Heavy, may require additional structural support |
| Lifespan | 20-25 years | 20-30 years |
When choosing between Spray Foam Roofing (SPF) and Built-Up Roofing (BUR) for your commercial building, it’s essential to consider various factors that impact long-term performance, cost, and durability.
Energy Efficiency: SPF roofing stands out for its superior insulating properties, significantly reducing heating and cooling costs. BUR provides moderate insulation but doesn’t match the energy efficiency of SPF.
Installation: SPF is easier and quicker to install, being lightweight and applicable over existing roofs, which can reduce labor costs. BUR, on the other hand, involves a time-consuming and labor-intensive process that might require additional structural support due to its weight.
Seamless and Leak Resistance: SPF’s seamless application minimizes the risk of leaks, making it an excellent choice in areas prone to heavy rainfall or snow. BUR has multiple layers with seams that could potentially lead to leaks, especially under harsh conditions.
Durability: Both roofing systems offer long lifespans, with SPF lasting 20-25 years with proper maintenance, and BUR potentially reaching 30 years. However, SPF requires re-coating every 5-10 years to maintain its protective qualities.
Cost: SPF typically comes with a higher upfront cost, but its energy efficiency and easier installation may offset these expenses over time. BUR may have a lower initial cost, but the need for additional structural support due to its weight can increase overall expenses.
UV and Fire Resistance: BUR has a natural advantage here, with its gravel or reflective coating providing excellent protection against UV rays and fire. SPF needs an elastomeric coating for UV protection but does not naturally offer the same level of fire resistance.
Maintenance: SPF requires regular maintenance, particularly re-coating, to ensure longevity. BUR, in contrast, requires minimal maintenance, although occasional checks to ensure even gravel distribution are recommended.
Versatility: SPF is highly versatile and can be applied to various roof shapes, making it ideal for buildings with complex designs. BUR is more suited to flat or low-slope roofs.
Weight: SPF is lightweight, which doesn’t add significant stress to the building structure. BUR is heavy and may necessitate additional support, increasing installation costs.
Lifespan: Both systems offer a comparable lifespan, with proper care and maintenance ensuring long-term performance.
Your choice between SPF and BUR should be based on your building’s specific needs, budget, and climate considerations. Both options have their strengths, and consulting with a professional can help you make the best decision for your property.