CLASS 4 IMPACT-RESISTANT SHINGLES IN COLORADO

What Are Class 4 Impact-Resistant Shingles?

Class 4 impact-resistant shingles are asphalt roofing shingles that have achieved the highest impact-resistance classification available under the UL 2218 testing standard. UL 2218 evaluates how roofing materials respond to impact by dropping steel balls of different sizes onto roofing samples and examining the material for damage.

To achieve a Class 4 rating, roofing material must successfully withstand the test using a 2-inch steel ball dropped from approximately 20 feet without the cracking or tearing that constitutes failure under the test. Lower classifications use smaller impactors, with ratings ranging from Class 1 through Class 4.

For Colorado homeowners, this distinction is especially relevant because hail is one of the most significant weather threats to residential roofing systems. A Class 4 rating gives homeowners a standardized way to identify roofing products that have demonstrated a higher level of impact resistance in laboratory testing.

However, Class 4 does not mean hail-proof. Actual hailstorm performance depends on factors such as hail size, wind speed and direction, roof age, temperature, roof slope, decking conditions, and the severity of the storm. A Class 4 rating should be viewed as an impact-resistance rating—not a guarantee that a roof cannot be damaged by hail.

Roof There It Is offers IKO Nordic performance shingles, which carry a Class 4 impact-resistance rating and use polymer-modified asphalt designed to provide additional flexibility and tear resistance. IKO Nordic shingles also carry a limited high-wind warranty of up to 130 mph when installed according to applicable requirements and warranty terms.

Why Class 4 Shingles Matter in Colorado

Colorado’s location along the Front Range and High Plains exposes homes to severe thunderstorms capable of producing large hail, strong winds, and rapidly changing weather conditions. For homeowners, the roofing material selected during a roof replacement can make an important difference in how the roofing system responds to future storms.

Class 4 impact-resistant shingles are particularly relevant in Colorado because they are tested to withstand greater impact forces than lower-rated roofing products. While no asphalt shingle should be considered hail-proof, choosing a Class 4 roofing product can provide an additional level of impact resistance for homes regularly exposed to Colorado hailstorms.

Class 4 roofing is also becoming increasingly important at the local level. Some Colorado municipalities have adopted roofing requirements that require Class 4 impact-resistant shingles for certain new roofs, reroofs, or qualifying roof replacements. These requirements vary by jurisdiction, which means homeowners should understand the building codes that apply specifically to their property before selecting a roof replacement system.

For example, the City of Fort Collins requires Class IV (UL 2218) asphalt shingles on new buildings and requires them for qualifying reroofs, including when 50% or more of the total roof area is repaired or replaced or when the entire roof is replaced.

Roof There It Is evaluates the requirements that apply to each project and helps homeowners choose a roofing system that meets applicable local codes, manufacturer specifications, and the needs of the individual home.

Colorado Cities With Class 4 Shingle Requirements

Class 4 impact-resistant shingles are not required by every Colorado municipality. However, some communities have adopted local roofing requirements that make Class 4 shingles mandatory for certain new roofs, reroofs, or roof replacements.

Because roofing codes can vary from one jurisdiction to another, homeowners should verify the requirements that apply to their property before choosing a roofing material. Roof There It Is reviews applicable local requirements when planning a roof replacement or significant roof repair.

Class 4 Shingles vs. Standard Asphalt Shingles

Not all asphalt shingles provide the same level of impact resistance. One of the biggest differences between standard asphalt shingles and Class 4 impact-resistant shingles is how the roofing material has been tested to perform when subjected to impact.

Standard asphalt shingles can provide dependable protection when properly installed, but they may not carry the highest impact-resistance classification available under the UL 2218 testing standard. Class 4 shingles have successfully achieved the highest classification within that testing system.

For Colorado homeowners, the difference can become particularly important when choosing materials for a roof replacement after hail damage or when replacing an aging roofing system.

One important distinction is that Class 4 describes impact resistance—it does not mean the shingle is indestructible or hail-proof. Severe hail can damage any roofing system, particularly when hail size, wind speed, storm duration, roof age, and other conditions combine during a major storm.

Roof There It Is offers IKO Nordic performance shingles, which carry a Class 4 impact-resistance rating. IKO manufactures Nordic shingles with polymer-modified asphalt designed to provide greater flexibility and tear resistance while maintaining the appearance of a premium architectural shingle.

If you’re unsure whether your existing roof has been affected by a recent storm, review the signs of roof hail damage or schedule a free roof inspection before deciding whether a repair or replacement is necessary.

IKO Nordic Class 4 Shingles

Roof There It Is offers IKO Nordic performance shingles as a premium Class 4 roofing option for Colorado homeowners. Nordic combines the appearance of an architectural asphalt shingle with enhanced impact resistance designed for areas exposed to severe weather.

According to IKO’s Nordic product specifications, Nordic shingles carry a Class 4 impact-resistance rating under UL 2218. Class 4 is the highest impact classification under the UL 2218 testing system and makes Nordic particularly relevant for Colorado homes regularly exposed to hail.

Polymer-Modified Asphalt

IKO Nordic shingles are manufactured using polymer-modified asphalt, which is engineered to improve the shingle’s flexibility and tear resistance. This helps distinguish Nordic from conventional asphalt shingles while contributing to its impact-resistant performance.

For Colorado homeowners, additional flexibility and impact resistance can be particularly valuable during severe thunderstorms involving a combination of hail and high winds.

ArmourZone® Reinforcement

Nordic shingles incorporate IKO’s ArmourZone®, a reinforced fastening area designed to help installers position nails correctly while increasing the shingle’s resistance to wind uplift.

IKO lists Nordic with a limited wind warranty of up to 130 mph when installed in accordance with the applicable installation and warranty requirements. Review the IKO Nordic product information for current specifications and warranty terms.

Class 4 Impact Resistance Does Not Mean Hail-Proof

Even a premium Class 4 shingle can be damaged during a severe hailstorm. Hail size, wind speed, impact angle, temperature, roof age, installation, and storm duration can all affect how a roofing system performs.

That’s why Roof There It Is doesn’t describe Nordic—or any Class 4 product—as hail-proof. Instead, Class 4 provides homeowners with a recognized impact-resistance rating that can be considered when selecting materials for a roof replacement.

If your existing roof has already experienced a Colorado hailstorm, a hail damage roof inspection can help determine its current condition before you decide whether repair or replacement is appropriate.

Part of the RTII Roof Guard System

IKO Nordic can also be incorporated into the RTII Roof Guard System, our approach to building a complete roofing system designed around Colorado’s demanding weather conditions rather than focusing on shingles alone.

Can Class 4 Shingles Lower Your Homeowners Insurance?

One potential benefit of installing Class 4 impact-resistant shingles in Colorado is that some homeowners insurance companies may offer discounts or other policy benefits for qualifying impact-resistant roofing materials.

However, insurance benefits are not automatic and vary by insurance carrier, policy, location, roofing product, and current underwriting requirements. Homeowners should confirm eligibility directly with their insurance agent or carrier before choosing a roofing product based on a potential insurance discount.

Colorado’s Division of Insurance specifically recommends that homeowners ask their insurer whether discounts are available for hail-resistant roofing materials. The Division also notes that homeowners should understand how roof age, roofing material and their individual policy can affect coverage.

Ask Your Insurance Agent Before Replacing Your Roof

Before selecting a Class 4 roofing system, consider asking your insurance agent:

• Does my policy offer a discount for a UL 2218 Class 4 roof?
• Does the roofing product need to appear on an approved product list?
• What documentation will you need after installation?
• Will installing a Class 4 roof affect my deductible or roof coverage?
• Will my roof continue to be insured at replacement cost, or does the policy use an actual cash value schedule as the roof ages?

The answers can vary considerably between insurance companies and policies.

Roof There It Is works with homeowners and insurance agents throughout Colorado to provide roofing documentation when needed. If your roof has been affected by a recent storm, start with a free roof inspection or learn more about our hail damage roof inspections.

How Much Do Class 4 Shingles Cost in Colorado?

The cost of installing Class 4 impact-resistant shingles in Colorado depends on more than the shingle itself. Roof size, roof pitch, number of stories, existing roofing materials, decking condition, ventilation, flashing, code requirements, accessibility, and the roofing system selected can all affect the final price.

Class 4 shingles are generally considered a premium roofing product, so the material cost may be higher than some standard asphalt shingles. However, homeowners should consider the complete roofing system and long-term value rather than comparing shingles based only on material price.

Local Building Codes Can Affect Roof Replacement Cost

Where you live can also affect the cost of a roof replacement. Colorado municipalities can have different requirements for:

• Class 4 impact-resistant shingles
• Ice-and-water shield
• Drip edge
• Underlayment
• Roof decking
• Tear-off and roof overlays
• Ventilation
• Wind resistance
• Snow loads
• Permits and inspections
• Wildfire-resistant roofing materials

For example, a roofing system that meets the requirements for one Colorado municipality may need different materials or installation details in another.

This is one reason Roof There It Is evaluates local roofing requirements before preparing an estimate rather than relying on a one-size-fits-all price.

Upfront Roofing Estimates

Roof There It Is provides homeowners with an upfront estimate based on the roof, selected materials, and applicable project requirements. Our goal is to explain what is included, why it’s included, and what roofing options are available before work begins.

Homeowners considering IKO Nordic or another Class 4 roofing system can start with a free roof inspection. We’ll evaluate the existing roof and explain whether roof repair, replacement, or no immediate roofing work makes sense.

Do Colorado Building Codes Require Class 4 Shingles?

Roofing requirements in Colorado can vary depending on the city, county, building department, and locally adopted building code that applies to a property. There is not one universal Class 4 roofing requirement that applies to every home throughout Colorado.

Some Colorado jurisdictions may require Class 4 impact-resistant shingles for certain roofing projects, while others may allow homeowners to choose between different approved roofing materials.

That’s why it’s important to distinguish between a Class 4 shingle being recommended for Colorado’s hail exposure and a Class 4 shingle being required by the building authority with jurisdiction over a particular property.

Local Roofing Requirements Go Beyond Class 4 Shingles

Impact resistance is only one consideration when replacing a roof in Colorado. Depending on the jurisdiction and project, local roofing requirements may address:

• Class 4 impact resistance
• Class A fire resistance
• Ice-and-water shield
• Drip edge
• Underlayment
• Roof decking and sheathing
• Tear-off and roof overlays
• Roof ventilation
• Shingle fastening and wind resistance
• Snow-load requirements
• Permits and inspections
• Contractor licensing
• Wildfire or Wildland-Urban Interface requirements

These requirements can affect both the materials used on a roof and how the roofing system must be installed.

Know the Requirements for Your Colorado Home

Before beginning a roof replacement, Roof There It Is reviews applicable local requirements and manufacturer specifications for the individual project.

This helps homeowners understand whether particular roofing components are required by local code, required by the roofing manufacturer, or being recommended as an upgrade.

If you’re considering Class 4 impact-resistant shingles or aren’t sure what roofing requirements apply to your home, schedule a free roof inspection. We can evaluate your existing roofing system and explain the options available for your property.

Protecting homes.

Building trust.

One roof at a time.

Frequently Asked Questions About Class 4 Shingles in Colorado

Considering Class 4 Shingles for Your Colorado Home?

Choosing the right roofing system involves more than selecting a shingle. Your home’s location, existing roof condition, local building requirements, hail exposure, ventilation, underlayment, flashing, and other roofing components can all affect the right solution.

Roof There It Is helps Colorado homeowners understand their options before making a decision. We’ll inspect your existing roofing system, explain what we find, review applicable local requirements, and help you determine whether a roof repair, roof replacement, or no immediate work makes sense.

If replacement is appropriate, we can explain the differences between available roofing systems, including Class 4 impact-resistant shingles, and provide an upfront estimate so you understand the cost and scope before moving forward.

Our goal is simple: help you choose a roofing system that makes sense for your home, your location, and Colorado’s demanding weather conditions.

Roofing Services Across Colorado

Roof There It Is provides free roof inspections, roof repairs, roof replacements, and hail damage inspections for homeowners throughout Colorado. Explore the communities we serve below to learn more about roofing services available in your area.

Denver & Northeast Metro

Denver
Thornton
Northglenn
Brighton
Commerce City
Aurora

Eastern & Northeastern Colorado

Sterling
Fort Morgan