Johnstown Roofing Contractor | Roof Replacement & Storm Repair

A+ BBB Rated & Top 5 Rated | Licensed Roofing Contractor Serving Johnstown & Milliken, CO

Custom Exteriors has replaced and repaired roofs across Johnstown and Milliken since 2018, from commercial buildings, residential, single-family homes, to HOA and condo communities. We’re licensed in Greeley, backed by an A+ BBB rating, and built our reputation on projects like a 16-building condo re-roof completed on schedule with zero disruption to residents. Whether you need a storm inspection, a full replacement, or ongoing maintenance, our local team handles the permit process, insurance claim, and installation from start to finish.

How Can We Help You?

Custom Exteriors Partners, Awards & Accreditations

Your Johnstown Roofing Contractor

Roof Replacement & Repair in Johnstown

When it’s time to fix or replace your roof in Johnstown, you want a team with real experience in this area, not a company that just showed up after the last storm. Custom Exteriors has completed roofing projects across Milliken and Johnstown, including a full roof replacement on a fourplex, along with numerous single-family homes throughout town. We focus on roof replacement, repair, and maintenance for homes and small multi-family properties.

We’re proud to hold a 5-star rating on Google and an A+ rating with the Better Business Bureau. Custom Exteriors was also ranked a Top 10 roofer in Greeley by BusinessRate, a recognition based on real customer feedback and business performance, not paid advertising.

Our team’s expertise goes beyond Johnstown. A part of our leadership team, has been featured by national outlets including Angi, CNN, USA Today, and Bob Vila. We have shared our roofing and home improvement insight with them and our team brings that same knowledge to every Johnstown project. Our owner and founder, Mike, is HAAG-certified. This means he’s completed specialized training recognized across the industry for accurately identifying storm and hail damage. That matters most when you’re filing an insurance claim. The more precise the damage report, the better your chances of getting the claim approved for what it should actually cover.

Residential Roofing

Most of our work in Johnstown is on single-family homes, from full roof replacements to repairs after hail and wind damage. Whether you’re dealing with storm damage or a roof that’s simply reached the end of its life, we walk you through every material option and handle the permit and insurance process from start to finish.

Commercial Roofing

Businesses in Johnstown need a roof that holds up without disrupting daily operations. We work with local business owners on flat roofing, repairs, and full replacements, scheduling around your hours so your business can keep running while the work gets done. We implement strict processes during commercial roof replacements to minimize disruption.

Multi-Family Roofing

We’ve completed full roof replacements on multi-family properties in Johnstown, including a fourplex, and we understand the added coordination that comes with HOA approval. From HOA communication to scheduling around residents, we handle the details that make multi-family roofing different from a single-family job.

Add Your Heading Text Here

Choosing the Right Roof Material for Your Johnstown Home

Colorado’s weather is hard on roofs. Between hail damage, intense sun, and heavy snow, the material you pick affects more than just how your home looks. It affects how often you’ll deal with repairs, whether you’ll qualify for insurance discounts, and how long it’ll be before you’re replacing it again.

which one is Right for You?

If you want the most cost-effective option with strong hail protection, asphalt with a Class 4 rating is usually the right call. If you’re staying in your home long term and want to minimize future replacements, metal is worth the higher upfront cost. If you want a specific look, like slate or shake, without the weight and price of the real thing, synthetic shingles are the best middle ground. And if you live in Thompson River Ranch, your roof is tile, which offers the longest lifespan of any option. These homes were built to support the weight it brings.

Every home is different, and the best way to know what’s right for yours is a free on-site inspection. We’ll look at your roof’s condition, your home’s structure, and your budget, then walk you through the honest tradeoffs, no pressure and no guessing. In the meantime, here’s what to know about each option.

Asphalt shingles are the most common roofing material on homes across Colorado, and they’re usually the best starting point for most homeowners. In Johnstown, we recommend Class 4 impact-resistant asphalt shingles specifically, since they’re built to handle hail without cracking or bruising.

Cost: $12,000–$25,000+
Lifespan: 20–25 years
Strong Impact Rating with Class 4
Widest Range of Colors and Styles
Can Qualify for Insurance Discounts
Easiest/Most Affordable to Repair

Synthetic shingles are made to look like natural slate or wood shake, but built from engineered polymers that are far more impact-resistant than the real thing. If you like the high-end look without the weight, cost, or maintenance of natural materials, this is the middle-ground option.

Cost: $18,000–$30,000+
Lifespan: 30–50 years
Impact resistance: Very strong
Mimics Slate or Wood Shake
Reflects heat, Can Reduce Cooling Costs
Higher Upfront Cost

Tile roofing gives you a distinct, classic look and excellent durability. The tradeoff is weight, since not every home’s structure can support tile without reinforcement. If you live in either section of Thompson River Ranch, your home likely features a tile roof as is the neighborhood architectural style.

Cost: $25,000–$40,000+
Lifespan: 50+ years
Impact resistance: Strong/Can Crack
Naturally Fire-Resistant
Requires Structural Evaluation
Repairs Require Specialized Skill

Metal roofing is the longest-lasting option on this list and sheds snow easily, which matters during Colorado winters. It also reflects heat instead of absorbing it, which can lower your cooling costs in the summer. While standing seam metal is an extremely durable choice, it can dent from large hail.

Cost: $20,000–$35,000+
Lifespan: 40–70 years
Impact resistance: Excellent/Cosmetic
Naturally Fire-Resistant
Reflects Heat, Can Reduce Cooling Costs
Higher Upfront Cost

Most Johnstown homes don’t have a fully flat roof, but many have a smaller flat section, like over a porch, addition, or garage. These use membrane materials like TPO or EPDM instead of shingles, since standard shingles don’t work on a low pitch. However these are common commercial application roofs.

Cost: Priced per square foot
Often Commercial Applications
Materials: TPO or EPDM Membrane
Specialized Installation Required
Can Be Paired with Other Roofing Systems
Fewer Qualified Installers

Roofing Permits, Requirements & Inspections in Johnstown, CO

What Does Johnstown Require When You're Replacing Your Roof?

Getting a permit right matters just as much as the roof itself. Johnstown updated its roofing requirements on January 1, 2026, when the town adopted the 2024 International Residential Code, and there are a few specific rules every roofing project has to follow.

Licensing

Your contractor must be licensed with the Town of Johnstown before a permit is issued.

Shingle Requirements

Class 4 impact-resistant shingles are required, tested to the UL2218 standard, since Johnstown is rated for winds up to 115 mph.

Tear-Off REquirements

All old roofing material has to be torn off down to the deck. Layering new shingles over old ones isn’t allowed.

Ice & Water Shield

An ice barrier is required along the lowest edges of the roof, extending at least 24 inches past the exterior wall.

Drip Edge Requirements

A drip edge is required at the eaves and gables on every new roof even if it was not on the original roof.

Ventilation

Roof vents need to meet current ventilation code, and any damaged vents or roof jacks have to be replaced.

Johnstown handles building inspections through SAFEbuilt, not the town directly. Every project needs a final inspection to confirm the work meets code and that the site’s been cleaned up, and tile roofs or commercial flat roofs also need a mid-roof inspection. Inspections have to be scheduled at least 24 hours in advance, and a secured ladder has to be on site for the inspector. Johnstown also allows remote video inspections as an option if you’d rather not wait for someone to come out in person.

We handle this entire process for you, from pulling the permit to scheduling both the mid-roof and final inspections with SAFEbuilt, so you don’t have to keep track of the code details yourself.

Why Johnstown Trusts Custom Exteriors

We Know Johnstown Properties

From single-family homes, to commercial properties, to larger multi-family communities, we understand the specific nuances of your property. We are skilled at avoiding disruption to your business or home. No matter what your property requires, we understand your roofing system requirements, and we handle it without adding stress to you, your property manager, your board or your residents.

Custom Exteriors, LLC: The Premier Roofing Contractor In Johnstown

Are you looking for a roofing contractor in Johnstown? If so, Custom Exteriors, LLC is, without a doubt, the trusted roofing company in Johnstown. In fact, we offer professional roofing options throughout the Johnstown area. Because we prioritize communication, we ensure you get the best service regardless of your roofing needs.

Custom Exteriors’ knowledge and experience. Additionally, our experts can work on residential and commercial properties. So, whether you’re looking for a roof replacement or repair, we’re here to help.

Furthermore, our experts provide complete roof inspections free of charge. After the inspection, our HAAG-certified roofing inspectors will review their findings. In turn, our customers can make informed decisions on their new roof. Because of this, Custom Exteriors is a top-rated roofing contractor in Johnstown.

Roofing is one of our specialties. But our experts are also premier siding contractors. We have over 50 years of experience in construction. In addition to roof and siding replacements, we are also experts in window replacements and exterior painting. So, if you’re ready to update the outside of your home, we’re the premier Johnstown exterior contractor!

Custom Exteriors is an expert Commercial roofing company in Johnstown, Colorado

At Custom Exteriors, we take pride in the superior quality of our work. With years of experience, we have the skills to ensure that each project we complete is done with professionalism.

We understand that commercial roofing projects demand unique skills and knowledge. Whether it’s an industrial complex or a commercial building, we have you covered.

Please review a recent commercial roof replacement completed by Custom Exteriors. This showcases the skill we enter each job with. Projects like these have established us as a trusted choice for a commercial roofing contractor in Johnstown.

Contact us today. We would love to show you why we are Johnstown’s go-to commercial roofing company. We look forward to serving you!

To learn more about the premier roofing contractor of Johnstown, call Custom Exteriors, LLC today or instead complete our online request form.

Emergency Tarping in Johnstown

The roofing experts at Custom Exteriors, LLC offer professional emergency tarping for all your properties throughout Johnstown and Milliken. Emergency tarping protects homes and commercial properties after fallen trees, high winds, and fire damage. In addition, tarping can be necessary after a hailstorm.

Roof tarping is only a temporary fix to keep your properties safe until proper repairs are completed. So it is important to work with a professional Johnstown roofing company.

Additionally, the skill with which your property is tarped is also important. Each used tarp is chosen specifically for the damages accrued on your properties. Because of our knowledge, we’ll select the best options to keep your property safe no matter how long the repair process takes.

Johnstown Roof Replacement Experts

Our experts will also provide a free roof inspection before tarping your roof. Then we allow time for pictures and the insurance collection process so you can feel confident you’re getting the best service.

If you choose not to tarp your damaged roof, you leave your properties open to damage. Minor damages, such as missing or loose shingles, can quickly become more costly damages. It’s important to remember tarping doesn’t just cover up the damage. It also protects the interior of your property from further damage, such as water damage!

No matter the time and no matter the damage, we’ll be there to protect your property. So, call us today if you suspect your roof has been damaged by a recent storm or accident.

Whether you need a roof replacement or a roof repair, our skilled roofing experts can help!

What to look for in a roofing company?

Location:
Choosing a local roofing company is essential! Who to better restore the damage to your home better than a local Johnstown roofing company? They are familiar with local codes and weather patterns and need unique to property owners in our area.
Licensing:
A roofing company local to the Johnstown area should be licensed in Johnstown and all the surrounding areas, such as Milliken, and more. They will understand licensing ensures your roof replacement meets current building codes regarding roofing installation.
Reputation:
Local roofing companies have done work right here, for your neighbors. Because of this, local roofing companies should have positive reviews from other area property owners. Additionally, they should also have a positive profile on the Northern Colorado BBB website.

Custom Exteriors is proud to be a Top-Rated Roofing Company in Johnstown! Because of this, please call us today to let us help you through your property's hail damage repairs.