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Commercial Roof Coating or New Roof? How to Decide for Your Facility

Thu, 21 May 2026 21:37:23 GMT

Commercial Roof Coating or New Roof?

If your commercial roof is aging or starting to leak, you’re likely facing a major decision: apply a roof coating or invest in a full roof replacement.

This choice can significantly impact your budget, your building’s performance, and your long-term maintenance costs.

Here’s the straightforward answer:
If your existing roof is still structurally sound, a commercial roof coating can often restore performance at a fraction of the cost of replacement. However, if the roof has major structural damage or widespread failure, replacement may be unavoidable.

In this guide, we’ll break down the differences, costs, benefits, and key decision factors so you can confidently choose the best solution for your facility.

What Is a Commercial Roof Coating?

A roof coating is a fluid-applied system that is installed directly over an existing roof. Once cured, it forms a seamless, waterproof membrane that protects and extends the life of the roof.

Common coating types include:

Silicone coatings
Acrylic coatings
Polyurethane coatings

These systems are often used as part of a roof restoration strategy, especially for flat or low-slope commercial roofs.

What Is a Full Roof Replacement?

A roof replacement involves removing the existing roof system entirely and installing a brand-new one.

This process typically includes:

Tear-off of old materials
Disposal and cleanup
Repairs to the roof deck
Installation of a new roofing system (TPO, EPDM, metal, etc.)

While replacement gives you a fresh start, it also comes with higher costs and more disruption.

Cost Comparison: Coating vs Replacement

Roof Coating

Lower upfront investment
No tear-off costs
Reduced labor requirements
Minimal disposal fees

In many cases, coatings can cost 50–70% less than a full replacement.

Roof Replacement

High material and labor costs
Tear-off and disposal expenses
Potential structural repairs

Replacement is typically the most expensive option, but sometimes necessary.

Installation Time and Disruption

Roof Coating

Faster installation (often days)
Minimal disruption to operations
No exposure of interior spaces

Roof Replacement

Longer timelines (weeks in many cases)
Increased noise and debris
Potential exposure during the tear-off

For occupied buildings, this difference can be critical.

Lifespan and Performance

Roof Coatings

Extend roof life by 10–20 years
Can be reapplied (recoated)
Protect against UV and weather damage

Roof Replacement

New system lifespan of 15–30 years
Eventually requires another full replacement

One key advantage of coatings is that they allow you to maintain rather than replace your roof over time.

Energy Efficiency Benefits

Roof coatings—especially reflective coatings—can significantly improve energy efficiency.

Benefits include:

Reduced heat absorption
Lower cooling costs
Improved indoor comfort

This is particularly valuable for commercial buildings with large roof surfaces.

When a Roof Coating Is the Best Choice

A coating system is ideal when:

The roof is structurally sound
Damage is limited or localized
You want to extend the roof's life
You want to reduce costs
You want minimal disruption

Many commercial roofs in Minnesota qualify for this type of restoration.

When You Need a Full Roof Replacement

Replacement is necessary when:

The roof deck is compromised
There is extensive water damage
Multiple systems have failed
The structure is unsafe

In these cases, coatings may not provide a reliable long-term solution.

Types of Roofs That Work Well with Coatings

Roof coatings can be applied to many systems:

Metal roofs
Single-ply membranes (TPO, EPDM, PVC)
Modified bitumen
Built-up roofing

This flexibility makes coatings a practical option for many commercial buildings.

Minnesota Climate Considerations

Minnesota’s weather creates unique challenges:

Snow and ice accumulation
Freeze-thaw cycles
UV exposure during summer

Roof coatings help by:

Creating a waterproof barrier
Reflecting sunlight
Protecting against temperature extremes

This makes them a strong option for extending roof life in this region.

Environmental Benefits

Roof coatings are also a more sustainable choice:

Reduce landfill waste (no tear-off)
Lower energy consumption
Extend the existing roof lifespan

For companies focused on sustainability, coatings can support environmental goals.

Key Decision Factors

When deciding between coating and replacement, consider:

1. Roof Condition

Is the structure sound, or is there major damage?

2. Budget

Are you looking to minimize upfront costs?

3. Timeline

Do you need a fast solution?

4. Long-Term Plans

Are you planning to hold the building long-term?

5. Energy Efficiency Goals

Do you want to reduce operating costs?

Frequently Asked Questions

How long do roof coatings last?

Most coatings last 10–20 years and can be reapplied to extend lifespan.

Are coatings waterproof?

Yes, they create a seamless, waterproof membrane.

Can coatings fix leaks?

Yes, coatings can seal leaks and prevent new ones.

Is a coating cheaper than replacement?

Yes, coatings are typically much more affordable.

Can all roofs be coated?

No—only roofs in good structural condition are suitable.

Call to Action

If you’re unsure whether your roof needs a coating or full replacement, a professional inspection is the best place to start.

Kohls Foam Systems, Inc. has been helping commercial property owners make cost-effective roofing decisions since 1987.

Call (612) 708-4111 or visit:
[Kohls Foam Systems – https://kohlsfoamsystems.com/ ]

Serving Eden Prairie, Minneapolis, and across Minnesota, as well as Colorado, Florida, Hawaii, and Illinois.

7 Signs Your Commercial Roof Is a Good Candidate for Restoration

Wed, 06 May 2026 17:55:22 GMT

the top signs your commercial roof can be restored instead of replaced

If your commercial roof is showing signs of wear, your first instinct might be to assume you need a full replacement. But in many cases, that’s not true—and acting too quickly could cost you significantly more than necessary.

Here’s the key takeaway:
Many commercial roofs can be restored instead of replaced, saving you thousands while extending the life of your existing system.

The challenge is knowing when restoration is a viable option. In this guide, we’ll break down the 7 most important signs your roof may be a strong candidate for restoration—and when replacement is actually the better choice.

What Is Commercial Roof Restoration?

Roof restoration is the process of repairing, reinforcing, and coating your existing roof to extend its lifespan without a full tear-off.

This often includes:

Addressing minor damage
Sealing leaks
Applying protective coatings or spray foam
Improving waterproofing and insulation

For many building owners, restoration offers a faster, more cost-effective alternative to replacement.

Why Choosing Restoration Matters

The most important factor is the structural integrity of your roof.

If your roof deck and underlying system are still in good condition, restoration is often a strong option.

What to look for:

No major sagging
No widespread rot or deterioration
Stable decking

If the structure is intact, there’s no need to tear everything off.

Before diving into the signs, it’s important to understand why this decision matters.

Choosing restoration when appropriate can:

Reduce project costs by 30–70%
Minimize business disruption
Extend roof life by 10–20+ years
Improve energy efficiency

For commercial properties in Minnesota, where weather conditions are harsh, making the right call can have long-term financial benefits.

Sign #1: Your Roof Is Structurally Sound

Sign #2: Leaks Are Isolated (Not Widespread)

Leaks don’t automatically mean you need a new roof.

In fact, many leaks are caused by:

Seams
Flashing issues
Penetrations (vents, HVAC units, etc.)

Good candidate for restoration:

A few localized leaks
Leaks that can be traced to specific problem areas

Not ideal for restoration:

Widespread moisture throughout the system

A professional inspection can determine the extent of water intrusion.

Sign #3: The Roof Surface Is Aging but Not Failing

If your building’s heating and cooling costs are increasing, your roof may be part of the problem.

Older roofs often:

Lose insulating properties
Allow air leaks
Absorb more heat

Restoration systems—especially spray foam—can:

Add insulation
Seal air leaks
Improve thermal performance

This is particularly valuable in Minnesota’s cold climate.

Over time, all roofing systems show signs of wear.

Common indicators include:

Surface cracking
Minor blistering
UV degradation
Fading or coating wear

These are normal aging signs—not necessarily failure.

Restoration systems like coatings or spray foam can renew the surface and protect it from further damage.

Sign #4: You’re Experiencing Rising Energy Costs

Sign #5: Your Roof Has Ponding Water Issues

Sign #7: You Want to Avoid Business Disruption

Flat and low-slope roofs commonly develop ponding water.

If left unaddressed, this can lead to:

Accelerated deterioration
Leaks
Structural stress

The good news:
Spray foam restoration can correct drainage issues by adding slope and eliminating low spots.

This makes it a strong solution for buildings dealing with standing water.

Sign #6: Your Roof Is Nearing the End of Its Warranty

When a roof warranty expires, many owners assume replacement is required.

But that’s not always the case.

If your roof is still in decent condition:

Restoration can extend its life significantly
You can avoid the cost of replacement
You can reset performance expectations

This is one of the most common scenarios where restoration makes financial sense.

Full roof replacements can be disruptive:

Noise and debris
Longer timelines
Potential exposure during tear-off

Restoration, on the other hand:

Is faster
Requires less labor
Keeps your building protected during installation

For occupied commercial buildings, this is a major advantage.

When Restoration Is NOT the Right Choice

While restoration is often ideal, there are cases where replacement is necessary.

These include:

Severe structural damage
Extensive water saturation
Multiple failed roofing systems
Unsafe decking

In these situations, restoration may only provide a temporary fix.

Types of Commercial Roofs That Can Be Restored

Many roofing systems are compatible with restoration:

Metal roofs
Single-ply membranes (TPO, EPDM, PVC)
Built-up roofing systems
Modified bitumen

This versatility makes restoration a practical option for a wide range of buildings.

Minnesota-Specific Considerations

Commercial roofs in Minnesota face unique stressors:

Freeze-thaw cycles
Heavy snow loads
Ice buildup
Temperature extremes

These conditions can accelerate wear—but they also make restoration more valuable.

A properly restored roof:

Resists moisture intrusion
Improves insulation
Handles seasonal stress more effectively

Cost Benefits of Roof Restoration

One of the biggest advantages of restoration is cost savings.

Compared to replacement:

Lower upfront investment
Reduced labor costs
No tear-off or disposal fees

In many cases, restoration allows building owners to delay or avoid a major capital expense.

Frequently Asked Questions

How do I know if my roof can be restored?

A professional inspection is required, but if the structure is sound and damage is limited, restoration is often possible.

Is restoration cheaper than replacement?

Yes, in most cases restoration is significantly more affordable.

How long does a restored roof last?

Depending on the system, restoration can extend roof life by 10–20+ years.

Can restoration fix leaks?

Yes, restoration systems are designed to seal and prevent leaks.

How long does the process take?

Most restoration projects are completed much faster than full replacements.

Call to Action

If your commercial roof is showing signs of wear, don’t assume replacement is your only option.

Kohl's Foam Systems, Inc. specializes in evaluating and restoring commercial roofs to extend their lifespan and improve performance.

Call (612) 708-4111 today or visit:
[Kohl's Foam Systems – https://www.kohlsfoamsystems.com/ ]

Serving Eden Prairie, Minneapolis, and the surrounding Minnesota areas, as well as Colorado, Florida, Hawaii, and Illinois.

What Is Spray Foam Roofing and How Does It Work on Low-Slope Buildings?

Tue, 21 Apr 2026 18:05:35 GMT

how spray foam roofing works on flat and low-slope buildings.

Spray foam roofing—also known as SPF (spray polyurethane foam)—is one of the most efficient and cost-effective roofing systems available for commercial buildings with flat or low-slope roofs. It’s not just a protective layer; it’s a fully integrated roofing system that provides insulation, waterproofing, and durability in a single application.

Here’s the simple explanation:
Spray foam roofing is applied as a liquid that expands into a seamless, insulated, waterproof barrier directly over your existing roof.

For building owners looking to avoid expensive tear-offs, reduce energy costs, and extend roof life, SPF roofing has become an increasingly popular solution—especially in climates like Minnesota.

What Is Spray Foam Roofing?

Spray foam roofing is made from a two-component mixture (isocyanate and polyol resin) that is sprayed onto a prepared roof surface. When these components combine, they react and expand into a rigid foam.

This foam forms a continuous, seamless layer across the entire roof.

Once the foam is applied, it is covered with a protective coating—usually silicone—to shield it from UV rays, weather exposure, and physical wear.

How Spray Foam Roofing Works (Step-by-Step)

Understanding the installation process helps explain why this system is so effective.

1. Roof Inspection and Preparation

Before application, the existing roof is thoroughly inspected to ensure it is structurally sound. Any necessary repairs—such as fixing damaged areas or addressing moisture—are completed.

The roof is then cleaned to remove debris, dirt, and contaminants.

2. Spray Foam Application

The liquid foam is sprayed evenly across the roof surface. As it is applied:

It expands rapidly (up to 30–60 times its original size)
Fills cracks, seams, and gaps
Creates a fully adhered layer

This expansion allows the foam to conform to irregular surfaces, making it ideal for older roofs.

3. Shaping and Slope Correction

One unique advantage of spray foam is that it can be shaped during installation.

Contractors can:

Improve drainage
Eliminate ponding water
Create proper slope where none existed

This is a major benefit over traditional systems that simply follow the existing structure.

4. Protective Coating Application

After the foam cures, a protective coating is applied.

This coating:

Shields against UV rays
Adds weather resistance
Enhances durability
Reflects sunlight to reduce heat absorption

Silicone coatings are commonly used because they perform well in extreme weather conditions.

Why Spray Foam Roofing Is Ideal for Low-Slope Roofs

Low-slope and flat roofs are more prone to:

Water pooling
Seam failures
Leak development
Drainage issues

Traditional roofing systems rely on seams and fasteners, which are common failure points.

Spray foam roofing eliminates these vulnerabilities by creating a seamless, fully adhered surface.

Key Benefits of Spray Foam Roofing

1. Seamless Waterproof Protection

Because there are no seams or joints, there are fewer opportunities for water intrusion.

This is especially important for commercial buildings where leaks can disrupt operations and damage assets.

2. Superior Insulation

Spray foam has a high R-value, meaning it provides excellent thermal resistance.

Benefits include:

Lower heating and cooling costs
Improved indoor comfort
Reduced strain on HVAC systems

In colder regions like Minnesota, this insulation can significantly reduce winter energy expenses.

3. Cost-Effective Installation

Since SPF can be applied over existing roofs, it eliminates:

Tear-off costs
Disposal fees
Excess labor

This makes it one of the most cost-effective commercial roofing options available.

4. Lightweight System

Spray foam is extremely lightweight compared to traditional roofing materials.

This reduces stress on the building structure and makes it suitable for a wide range of properties.

5. Long Lifespan with Maintenance

A properly installed spray foam roof can last 20–30 years or more.

Instead of replacing the roof, it can be:

Inspected regularly
Recoated every 10–15 years

This extends its life without major capital expenses.

6. Improved Drainage

Because SPF can be shaped during installation, it helps eliminate ponding water—a major cause of roof failure.

Common Applications for Spray Foam Roofing

Spray foam roofing is widely used on:

Warehouses
Office buildings
Retail centers
Industrial facilities
Schools and municipal buildings

It is especially effective for buildings with flat or low-slope roofs that experience recurring issues.

How Spray Foam Compares to Other Roofing Systems

Spray Foam vs TPO/EPDM

SPF: Seamless, insulated, fully adhered
TPO/EPDM: Seamed systems with potential leak points

Spray Foam vs Metal Roofing

SPF: Can restore existing metal roofs
Metal: Requires full installation and higher upfront cost

Spray Foam vs Built-Up Roofing (BUR)

SPF: Lightweight and energy-efficient
BUR: Heavier, more labor-intensive, and less insulated

Climate Performance: Why SPF Works in Minnesota

Minnesota’s climate presents several roofing challenges:

Heavy snow loads
Freeze-thaw cycles
Extreme temperature swings

Spray foam roofing performs well because:

It eliminates seams where water can freeze and expand
Provides continuous insulation
Reduces thermal movement

This makes it particularly effective for buildings in Eden Prairie, Minneapolis, and surrounding areas.

Maintenance Requirements

Spray foam roofing is relatively low-maintenance but still requires:

Annual inspections
Periodic cleaning
Recoating every 10–15 years

Regular maintenance ensures maximum lifespan and performance.

When Spray Foam Roofing May Not Be Suitable

Although SPF is highly versatile, it may not be ideal if:

The roof structure is severely damaged
There is extensive moisture trapped in the system
The substrate cannot support adhesion

In these cases, a replacement may be necessary.

Frequently Asked Questions

If you’re considering spray foam roofing for your commercial building, the next step is a professional evaluation.

Kohl's Foam Systems, Inc. has been installing high-performance spray foam systems since 1987, helping building owners reduce costs and extend roof life.

Call (612) 708-4111 or visit:
[Kohl's Foam Systems – https://kohlsfoamsystems.com/ ]

Serving Eden Prairie, Minneapolis, and across Minnesota, as well as Colorado, Florida, Hawaii, and Illinois.

How thick is spray foam roofing?

Typically, spray foam is applied at a thickness of 1–2 inches, depending on the building’s needs.

Is spray foam roofing waterproof?

Yes. Its seamless design creates a fully waterproof barrier.

How long does installation take?

Most projects can be completed in a few days, depending on size and conditions.

Can spray foam be applied over an existing roof?

Yes, as long as the existing roof is structurally sound.

Does spray foam roofing require maintenance?

Yes, but it is minimal compared to traditional systems.

Call to Action

Spray Foam Roofing vs Roof Replacement: Which Is Better for a Commercial Building?

Mon, 06 Apr 2026 13:41:57 GMT

Compare spray foam roofing vs full replacement for commercial buildings

If you’re managing or owning a commercial building, one of the most expensive decisions you’ll face is whether to restore your existing roof or replace it entirely. The difference between choosing spray foam roofing and a full roof replacement can easily impact your budget by tens—or even hundreds—of thousands of dollars.

Here’s the short answer:
If your existing roof is structurally sound, spray foam roofing is often the more cost-effective, energy-efficient, and less disruptive option. However, if your roof has severe structural damage or saturation, replacement may be necessary.

This guide breaks down everything you need to know so you can make the right decision for your building, your budget, and your long-term goals.

Understanding Spray Foam Roofing (SPF Systems)

Spray polyurethane foam (SPF) roofing is a fluid-applied system that is sprayed directly onto an existing roof. Once applied, it expands into a solid, seamless layer that adheres to the surface and creates a fully waterproof barrier.

On top of the foam, a protective coating—usually silicone—is added to protect against UV rays, weather, and wear.

What makes spray foam unique?

Seamless application: No joints, seams, or fasteners where leaks typically occur
Fully adhered system: Bonds directly to the roof surface
Built-in insulation: Adds significant R-value
Custom fit: Expands to fill cracks, gaps, and uneven surfaces

Unlike traditional systems, spray foam doesn’t just cover your roof—it improves its performance.

What Happens During a Full Roof Replacement?

A full roof replacement involves removing the entire existing roofing system down to the deck and installing a new one. This may include:

Removing old membranes, insulation, and flashing
Repairing or replacing damaged decking
Installing a new roofing system (TPO, EPDM, metal, etc.)

While this provides a completely new system, it also comes with significant drawbacks in terms of cost, time, and disruption.

Cost Breakdown: Spray Foam vs Roof Replacement

For most building owners, cost is the biggest factor.

Spray Foam Roofing Costs

Spray foam roofing is typically significantly less expensive because:

No tear-off is required
Less labor is involved
No landfill or disposal costs
Faster installation reduces labor hours

Additionally, future maintenance is more affordable because the roof can be recoated instead of replaced.

Roof Replacement Costs

A full replacement includes:

Demolition and disposal
Labor-intensive installation
Higher material costs
Potential structural repairs

In many cases, replacement costs can be 2–3 times higher than restoration.

Energy Efficiency: A Major Long-Term Advantage

One of the biggest advantages of spray foam roofing is its ability to reduce energy costs immediately.

Why SPF improves energy performance:

High R-value insulation
Eliminates air leaks
Reflective coatings reduce heat absorption

In climates like Minnesota, where winters are long and heating costs are high, this added insulation can lead to substantial savings over time.

Many building owners see reductions in energy usage of 10–30% after installation.

Installation Timeline and Business Impact

Spray Foam Roofing

Quick installation (often days instead of weeks)
Minimal disruption to tenants or operations
No exposure to the interior during installation

Because the system is applied over the existing roof, your building remains protected throughout the process.

Roof Replacement

Longer timelines
Increased noise and debris
Potential exposure to weather during tear-off
Greater disruption to operations

For occupied commercial buildings, this can be a major concern.

Lifespan and Long-Term Value

Spray Foam Roofing

20–30+ year lifespan
Recoat every 10–15 years
Minimal tear-off required over time

The key advantage here is sustainability—you’re not replacing the roof again, just maintaining it.

Roof Replacement

Lifespan varies (15–30 years, depending on the system)
Eventually requires another full replacement
Seams and fasteners can degrade over time

Over the decades, replacement systems often cost more due to repeated tear-offs.

When Spray Foam Roofing Is the Best Choice

Spray foam is ideal if:

Your roof is still structurally sound
You want to avoid high replacement costs
You’re dealing with recurring leaks
You want to improve energy efficiency
Your building has a flat or low-slope roof
You need a fast, low-disruption solution

This applies to many commercial buildings throughout Minnesota and other service areas.

Leak Resistance and Waterproofing

Water intrusion is one of the most common and costly problems in commercial roofing.

Spray Foam Roofing

Seamless surface eliminates leak points
Expands to seal cracks and penetrations
Fully adhered—no water migration underneath

Traditional Roof Systems

Seams, fasteners, and penetrations create vulnerabilities
Leaks can travel beneath the membrane before detection

This makes spray foam especially effective for buildings that have experienced recurring leaks.

When Roof Replacement Is the Better Option

Despite its advantages, spray foam isn’t always the right choice.

Replacement is necessary when:

The roof deck is damaged or rotting
There is severe water saturation
Multiple roofing systems have failed
Structural integrity is compromised

A professional inspection is the only way to determine this accurately.

Minnesota Climate Considerations

Commercial roofs in Minnesota face unique challenges:

Heavy snow loads
Freeze-thaw cycles
Ice dam formation
Extreme temperature swings

Spray foam performs well in these conditions because:

It eliminates seams where water can enter
It provides continuous insulation
It reduces thermal movement

For many property owners in Eden Prairie, Minneapolis, and surrounding areas, this makes SPF a highly practical solution.

Environmental and Sustainability Benefits

Spray foam roofing is also a more sustainable option:

Reduces landfill waste (no tear-off)
Improves energy efficiency
Extends the life of existing roofing systems

For companies focused on sustainability or ESG goals, this can be a major advantage.

Frequently Asked Questions

Is spray foam roofing always cheaper than replacement?

In most cases, yes. However, if your roof has structural damage, replacement may be required.

How long does installation take?

Spray foam roofing can often be completed in a few days, while replacements can take weeks.

Can spray foam be applied over a metal roof?

Yes, spray foam is commonly applied over metal roofs and is an excellent restoration solution.

How often does spray foam need maintenance?

Recoating is typically needed every 10–15 years to maintain performance.

Will spray foam roofing stop leaks?

Yes. Its seamless design eliminates the most common sources of leaks.

If you’re unsure whether your building needs a full replacement or if restoration is possible, the smartest first step is a professional evaluation.

Kohls Foam Systems, Inc. has been serving commercial property owners since 1987 with proven, cost-effective roofing solutions.

Call (612) 708-4111 today or visit:
[Kohls Foam Systems – https://kohlsfoamsystems.com/ ]

Serving Eden Prairie, Minneapolis, and across Minnesota, as well as Colorado, Florida, Hawaii, and Illinois.