Determining whether your business needs a new roof involves considering several details. These are the most common signs that indicate it may be time to replace your commercial roof:

• Age of the Roof: Most commercial roofs have an estimated lifespan, as mentioned previously. If your roof is approaching or has exceeded its expected lifespan, it’s a good indication that you may need a new roof.

• Visible Damage: Inspect your roof for any visible signs of damage. Look for cracks, splits, blistering, curling or buckling shingles, missing or damaged tiles or excessive wear and tear.

• Water Leakage: If you notice water stains, leaks, or moisture inside your building, it’s a strong indicator that your roof is compromised. Persistent leaks that cannot be repaired effectively may necessitate a new roof.

Sagging or Bowed Roof: A sagging or bowed roof is a serious concern and could indicate structural issues. If you notice any significant deformations or irregularities in the shape of your roof, it’s essential to have it inspected by a commercial roofing professional, as it may require replacement.

Excessive Energy Costs: If your energy bills have been consistently high, it could be due to poor insulation or inadequate ventilation in your roof. Upgrading to a new, energy-efficient roof can help reduce energy costs over time.

Roofing Material Deterioration: Different roofing materials exhibit various signs of deterioration. Shingles may become brittle or start losing granules, metal roofs may develop rust or corrosion, and flat roofs may develop extensive cracks or tears. If you observe significant deterioration in your roofing material, it may be time for a replacement.

On average, the cost of a commercial roof installation can range from $5 to $15 per square foot. However, this is a rough estimate, and prices can go beyond this range based on the factors mentioned earlier. Complex roofs with unique architectural features or multiple levels can be more expensive to install. 

Here is a breakdown of different commercial roof costs: 

• Built-Up Roofing (BUR): $3 to $7 per square foot

• Modified Bitumen: $4 to $8 per square foot

• Thermoplastic Olefin (TPO): $5 to $8 per square foot

• Ethylene Propylene Diene Monomer (EPDM): $4 to $8 per square foot

• Metal Roofing: $7 to $12 per square foot

• PVC: $6 to $10 per square foot

• Spray Polyurethane Foam (SPF): $5 to $10 per square foot

The time it takes to install a new commercial roof can vary. Some things to consider are the size and complexity of the roof, the type of roofing material being installed, weather conditions, and the efficiency of the roofing crew. Here are some general guidelines for the duration of a commercial roof installation:

• Small to Medium-Sized Roof: For a relatively small or medium-sized commercial roof with a simple design, the installation process may take anywhere from a few days to a couple of weeks. This timeframe includes the removal of the old roof (if necessary), surface preparation, installation of the new roofing material, and finishing touches.

• Large or Complex Roof: Larger commercial roofs or those with complex designs, multiple levels, or unique architectural features may require more time for installation. It could take several weeks or even months to complete the installation, depending on the specific project requirements.

• Weather Delays: Weather conditions play a crucial role in roof installation. Inclement weather such as rain, snow, or high winds can cause delays and extend the installation timeline. Roofing work may need to be halted during adverse weather conditions to ensure safety and maintain the quality of the installation.

Choosing the right roof for your business depends on various factors, including your specific needs, budget, location, and building requirements. Here are some common types of commercial roofing materials along with their characteristics to help you make an informed decision:

1. Built-Up Roofing (BUR): BUR roofs consist of multiple layers of bitumen and reinforcing materials. They provide excellent waterproofing and durability, making them suitable for low-slope or flat roofs. BUR roofs are cost-effective and can withstand heavy foot traffic.
2. Modified Bitumen: Modified bitumen roofs are a variation of BUR roofs but come in pre-fabricated rolls or sheets. They offer enhanced flexibility and resistance to extreme temperatures. Modified bitumen roofs are suitable for low-slope roofs and are known for their durability.
3. Thermoplastic Olefin (TPO): TPO roofs are single-ply membranes that provide energy efficiency, UV resistance, and durability. They are lightweight, cost-effective, and reflect sunlight, reducing cooling costs. TPO roofs are commonly used in commercial buildings.
4. Ethylene Propylene Diene Monomer (EPDM): EPDM roofs are synthetic rubber membranes known for their durability and resistance to UV radiation. They are suitable for flat or low-slope roofs and offer excellent weather resistance and flexibility.
5. Metal Roofing: Metal roofs, available in various materials such as steel, aluminum, or copper, are durable, long-lasting, and low maintenance. They offer excellent protection against the elements, are energy-efficient, and can be aesthetically pleasing. Metal roofs are versatile and can complement different architectural styles.
6. PVC (Polyvinyl Chloride): PVC roofs are single-ply membranes that provide excellent resistance to chemicals, fire, and UV radiation. They offer strong durability, flexibility, and energy efficiency. PVC roofs are commonly used in restaurants, manufacturing facilities, and chemical plants.

It’s essential to consult with a professional roofing contractor or a commercial roofing specialist who can assess your specific needs, evaluate your building’s characteristics, and provide recommendations based on factors such as climate, budget, durability requirements, and energy efficiency goals.