TO REPLACE OR NOT TO REPLACE
When Commercial Roof Replacement is Necessary
Replacing a commercial roof becomes necessary when repairs are no longer cost-effective, the roof system has reached the end of its lifespan, or the building is at risk of structural or operational damage. Common indicators include:
Age of the Roof
Different commercial roofing systems have typical lifespans:
- TPO/PVC: ~20–30 years
- EPDM: ~20–25 years
- Built-up roofing (BUR): ~20–30 years
- Metal roofing: ~40+ years
Persistent Leaks or Water Intrusion
Occasional leaks can usually be repaired, but widespread or recurring leaks often indicate:
- Structural moisture damage
- Membrane failure
- Saturated insulation
- Compromised flashing
Extensive Storm or Weather Damage
Commercial roofs exposed to hail, wind, freeze-thaw cycles, or UV exposure may suffer:
- Structural deterioration
- Membrane punctures
- Seam separation
- Blistering
- Ponding water
Rising Energy Costs
Older roofs with failing insulation or reflective coatings can reduce energy efficiency. A new roofing system may significantly improve:
- HVAC performance
- Indoor temperature consistency
- Utility costs
Frequent Repairs
If maintenance calls are becoming routine and repair costs continue adding up, replacement often provides a better long-term return on investment.
Visible Structural Issues
Signs such as sagging, soft spots, deck deterioration, or interior ceiling stains may indicate underlying structural issues that require afull replacement.
Code Compliance or Insurance Requirements
In some cases, local building codes or insurance carriers may require replacement after major storm damage or when the roof no longer meets current standards.
Typical Rule of Thumb
Many commercial property owners consider replacement when repair costs approach 25–30% of a new roof’s cost within a short timeframe.
A professional inspection — including moisture scanning or core sampling when necessary — is usually the best way to determine whether repair, restoration, or replacement makes the most financial sense.
COMMERCIAL SYSTEMS
Roof Systems for Commercial Buildings
Check out our commercial roofing systems chart and guide tabs for a concise, practical guide to the most common commercial roofing systems. You can view what they are, how long they shine, key advantages, and what to watch out for.
| System | Lifespan | Cost | Key Advantage |
| EPDM | 20-30 Years | $ | Low cost, easy repair |
| TPO | 15-25 Years | $$ | Energy Efficiency |
| PVC | 20-30 Years | $$$ | Chemical Resistance |
| METAL | 40-70 Years | $$$$ | Longevity |
EPDM
TPO
PVC
METAL
EPDM (rUBBER)
What it is: Single-ply synthetic rubber membrane (usually black).
Pros:
Cost-effective
Excellent weather resistance
Easy repairs
Cons:
Black surface absorbs heat (higher cooling costs)
Seams rely on adhesives/tapes
Best for: Budget-conscious projects and large flat roofs.
TPO (Thermoplastic Polyolefin)
What it is: White, reflective single-ply membrane with heat-welded seams.
Pros:
Energy efficient (reflects UV)
Strong seams (heat-welded)
Resistant to mold/dirt build up
Cons:
Quality varies by manufacturer (Asscher sources the best quality TPO)
Can age faster in extreme conditions
Best for: Energy-efficient buildings in warmer climates.
PVC (Polyvinyl Chloride)
What it is: Durable single-ply membrane similar to TPO but more chemical-resistant.
Pros:
Highly resistant to chemicals, grease, and fire
Strong, long-lasting seams
Reflective and energy-efficient
Cons:
More expensive than TPO/EPDM
Can become brittle over time
Best for: Restaurants, factories, or buildings with chemical exposure.
METAL
What it is: Panels made of steel, aluminum, or other metals (often standing seam).
Pros:
Extremely long lifespan (40–70 years)
Durable against weather and fire
Low maintenance
Cons:
Higher upfront cost
Noise (rain/hail) if not insulated
Best for: Sloped commercial roofs or long-term investments.
A commercial roof replacement is a multi-phase project designed to protect the building, minimize disruption, and ensure long-term performance.
While the exact process varies depending on the roofing system and building type, most projects follow these stages. Click the stage for more information.
1. Initial Roof Inspection & Assessment
The process begins with a comprehensive inspection of the existing roof system.
Contractors evaluate:
- Roof age and condition
- Leak history
- Membrane damage
- Flashing condition
- Drainage performance
- Insulation moisture levels
- Structural integrity of the roof deck
Advanced diagnostic tools may include:
- Infrared moisture scans
- Core sampling
- Drone inspections
- Moisture meters
The goal is to determine whether the roof qualifies for repair, restoration, overlay, or full replacement.
2. Project Planning & Proposal
After the inspection, the contractor develops a replacement plan tailored to the building.
This typically includes:
- Recommended roofing system (TPO, EPDM, PVC, metal, modified bitumen, etc.)
- Scope of work
- Timeline
- Safety procedures
- Material specifications
- Warranty options
- Budget estimates
During this phase, contractors also identify:
- Weather considerations
- HVAC units or rooftop equipment that may affect installation
- Occupancy concerns
- Access points
3. Permits, Engineering & Material Ordering
Before work begins, necessary approvals are secured.
This may involve:
- Building permits
- Engineering reviews
- Manufacturer approvals
- Insurance documentation
Materials are then ordered and staged for delivery, including:
- Insulation
- Membranes
- Fasteners
- Flashing components
- Drainage accessories
For larger buildings, logistics planning becomes especially important to minimize business interruption.
4. Site Preparation & Safety Setup
The worksite is prepared to protect occupants, employees, and property.
Preparation usually includes:
- Installing safety barriers and warning signage
- Setting up fall-protection systems
- Protecting landscaping and entrances
- Coordinating debris removal
- Establishing material staging areas
Contractors also communicate schedules and safety procedures with building management.
5. Tear-Off of Existing Roof
The old roofing system is removed down to the roof deck unless an approved overlay system is being installed.
Crews remove:
- Existing membrane
- Wet insulation
- Damaged flashing
- Fasteners and adhesives
Debris is typically disposed of using dumpsters or chute systems.
During tear-off, contractors inspect the exposed deck for:
- Rust
- Rot
- Cracks
- Structural weakness
Any damaged decking must be repaired before installation continues.
6. Roof Deck Repairs
A stable substrate is critical for the new roofing system.
Common repairs include:
- Replacing deteriorated metal decking
- Repairing concrete cracks
- Replacing damaged wood sections
- Reinforcing structural components if needed
Once repairs are complete, the deck is cleaned and prepared for installation.
7. Installation of Insulation & Cover Boards
New insulation is installed to improve thermal efficiency and create a smooth roofing surface.
This phase may include:
- Polyiso insulation boards
- Tapered insulation for drainage
- High-density cover boards for durability
Proper insulation installation helps:
- Meet modern energy codes
- Reduce energy costs
- Improve drainage
- Increase roof lifespan
8. Installation of the New Roofing System
The primary roofing membrane or panels are installed according to the manufacturer’s specifications.
Depending on the system, installation methods may include:
- Mechanically attached systems
- Fully adhered membranes
- Ballasted systems
- Standing seam metal panel installation
Critical components installed during this phase:
- Flashings
- Edge metal
- Expansion joints
- Pipe boots
- Penetration seals
- Drain systems
Attention to detail here is essential because most commercial roof leaks occur around penetrations and flashing details.
9. Quality Control & Manufacturer Inspections
Throughout the project, supervisors perform quality checks to ensure:
- Proper seam welding
- Secure fastening
- Correct membrane attachment
- Proper drainage slope
- Code compliance
**Many manufacturers also require independent inspections before issuing warranty coverage.
Testing may include:
- Final drainage evaluation
- Seam probing
- Adhesion testing
- Moisture verification
10. Cleanup & Debris Removal
Once installation is complete, crews thoroughly clean the site.
This includes:
- Removing debris and unused materials
- Magnetic sweeping for nails and metal fragments
- Cleaning drains and gutters
- Restoring work areas
Professional cleanup is especially important for occupied commercial facilities.
11. Final Walkthrough & Warranty Delivery
The project concludes with a final walkthrough involving the contractor and property owner or facility manager.
During the walkthrough:
- Completed work is reviewed
- Any punch-list items are addressed
- Maintenance recommendations are discussed
- Warranty documents are provided
Typical warranties may include:
- NDL (No Dollar Limit) warranties for qualifying systems
- Manufacturer material warranties
- Contractor workmanship warranties
COMMERCIAL ROOFING ACROSS INDUSTRIES
Industries We Serve
Asscher Roofing provides tailored commercial roofing solutions for a wide range of industries, each with unique needs, timelines, and budgets.
Restaurants
→ Fast, efficient service with minimal disruption
→ Flexible scheduling around peak hours
Small Businesses
→ Cost-effective roofing options
→ Reliable protection to support daily operations
Factories & Industrial Facilities
→ Durable systems built for demanding environments
→ Focus on safety, performance, and longevity
Apartment Buildings & Multi-Family Properties
→ Scalable solutions for large properties
→ Long-term protection for owners and tenants
Recreation Spaces (gyms, sports facilities, entertainment venues)
→ Roofing systems designed for high-traffic use
→ Built to handle diverse conditions and activity levels
No matter your industry, Asscher Roofing delivers dependable service, clear communication, and roofing solutions built to last.
Partnerships
We are a standalone business that is built within a family of companies that provide exceptional service.
Companies choose Asscher Roofing because we deliver dependable, specialized commercial roofing solutions that reduce risk, control costs, and protect the integrity of the business.
FAQs
How much are commercial inspections?
Commercial inspections start at $250.
How do I know which commercial roofing system is right for my building?
The best system depends on your building’s structure, budget, and long-term goals. Flat roofs often benefit from TPO, PVC, or EPDM, while sloped structures may be better suited for metal roofing. A professional inspection helps determine the ideal solution based on durability, energy efficiency, and cost.
How long does a commercial roof installation take?
Most commercial roofing projects take anywhere from a few days to a couple of weeks, depending on the size of the building, weather conditions, and the type of roofing system being installed. Larger or more complex projects may take longer.
Will my business operations be disrupted during installation?
In most cases, roofing work can be scheduled and managed to minimize disruption. Professional crews plan around your hours of operation, maintain safe work zones, and communicate clearly to keep your business running smoothly.
Ready To Get Started?
ROOFING | SIDING | SOFFIT | GUTTERS | FASCIA