Commercial Roof Leak Repair Denver | HRS Commercial Roofing

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Free Roof Assessment

If you have questions about your roof’s condition, a professional assessment is the best place to start. As part of your HRS Commercial Roofing complimentary assessment, we will:

Evaluate the condition of your roof
Explain what we find in plain language
Help you understand your options moving forward

Schedule a roof assessment to get clear answers and avoid costly surprises.

man performing commercial roof leak repair

Commercial Roof Leak Repair: Detection, Diagnosis and Permanent Fixes

A leaking roof is one of the most serious issues that can potentially impact your commercial building. Commercial roof leaks occur when water penetrates roofing systems, often due to severe weather, improper installation or the degradation of roofing materials over time, requiring professional commercial leak detection and commercial roof leak repair. These issues require immediate attention to protect your building.

If you don’t fix a commercial roof leak in a timely manner, it can cause a variety of significant and costly issues, including:

Structural Damage to Your Building – Water intrusion from a roof leak can damage insulation, cause wood to rot, weaken building materials and result in mold growth.
Expensive Repairs – Once a small leak causes widespread water damage in your building, repairs can become much more expensive.
Disruption to Business Operations – Roof leaks can disrupt your internal operations or your tenants’ businesses. Equipment damage, wet floors and unsafe conditions can create liability concerns, and you may experience significant downtime while repairs are completed.

At HRS Commercial Roofing, we provide commercial roof leak detection services to identify the precise cause and location of the issue, and our comprehensive commercial roof leak repair services will restore your building to prevent additional damage and minimize disruption to your operations.

Signs Your Commercial Roof Has a Leak

Early detection of a commercial roof leak is critical to minimize the damage to your building. Unfortunately, roof leaks aren’t always obvious. Even when you don’t see dripping water, there are other warning signs that may indicate you have a leaking roof.

Interior Signs of a Roof Leak

The following warning signs inside the building often indicate that a commercial roof leak has developed:

Brown, yellow or discolored spots on your ceiling or walls
Musty odors or mold growth inside your building
Dripping water or puddles forming on the floor during storms

Exterior Signs of Roof Damage

There are also some visible warning signs of external roof damage that are commonly associated with leaks:

Ponding water on your roof after a storm is typically a sign of a drainage problem that can eventually cause a leak
Bubbling or blistering roofing materials can allow water to seep through
Cracks, punctures or tears in the roof membrane can create opportunities for water intrusion
Open seams from failed seals can expose underlying roof layers, increasing the risk of a leak
Damaged flashing around the edges of your roof creates gaps which can result in a leak

Why Roof Leaks Often Go Unnoticed

Most leaks start small and take time to become noticeable. There are several reasons why it may take time before you become aware of a leak:

Hidden Entry Points – Water may enter your roof through flashing, shingles or vents, but the signs of damage can show up far from the source, making it hard to properly identify a leak as the cause.
Delayed Warning Signs – It may take weeks or months for ceiling stains or other signs of a leak to develop.
Seasonal Changes – If roof damage occurs during a dry season, you may not see signs of a leak until you experience heavy precipitation.

Unfortunately, a small leak that goes undetected for extended periods of time can spiral into major damage to your commercial building before you’re aware of the issue. To avoid this damage, it’s important to schedule regular professional roof inspections to help you identify leaks in their earliest stages.

Common Causes of Commercial Roof Leaks

Understanding reasons why commercial roof leaks develop will help you identify potential issues in their earliest stages, allowing you to make any necessary repairs before your building sustains significant damage. Some of the most common causes include:

Aging Roofing Materials – Wear and tear from sun exposure, extreme weather conditions and general aging can cause roofing materials to blister, crack or become less waterproof.
Failed Flashing Around Penetrations – Over time, flashing around skylights, vents and HVAC units can crack, loosen or corrode, creating gaps that allow for water to enter your building.
Membrane Punctures or Tears – Foot traffic, debris and hail can create holes in your roofing membrane.
Poor Installation or Repairs – Inadequate seams, misaligned roofing layers or improper adhesives can create gaps for water to enter or cause roofing systems to fail early.
Storm Damage – Extreme weather events such as hail, strong winds, heavy rain or large snow accumulations can cause punctures or tears that compromise the structure of your roofing system.
Ponding Water – Roofs with low or flat slopes are prone to pooling water. This can be exacerbated by poor drainage, allowing water to collect on the roof’s surface for extended periods of time, increasing the chances of a leak.
Neglected Maintenance – Failing to address regular commercial roof maintenance tasks can cause small issues to become significant leaks.

Commercial Roof Assessment

If you have questions about your roof’s condition, a professional assessment is the best place to start. HRS will evaluate your roof, explain what we find in plain language and help you understand your options moving forward. Schedule a roof assessment to get clear answers and avoid costly surprises.

CALL NOW: (303) 536-3896 SCHEDULE TODAY

worker diagnosing a commercial roof leak

puddles on a commercial roof causing a leak

Commercial Roof Leak Detection Methods

Early detection of a roof leak plays a critical role in preventing extensive and costly damage to your building. These inspections often function as a commercial roof moisture survey, helping identify hidden water intrusion before visible damage appears inside the building.

At HRS Commercial Roofing, we utilize the most advanced commercial roof leak detection methods to ensure any issues are identified and addressed in a timely manner. This technology is combined with decades of commercial roofing experience to provide the accurate leak detection services necessary to prevent serious damage.

Our expert roof technicians start with a visual roof inspection where we check for cracks, ponding, damaged flashing and seam failures. We also supplement this visual assessment with the following roof leak detection services:

Infrared Moisture Scanning – This non-invasive thermography technology records temperature variations to detect moisture underneath the surface of your roof.
Electronic Leak Detection – This approach uses vector mapping to identify punctures in roof membranes.
Water Testing – We conduct controlled flooding or spraying to pinpoint the specific water entry points in your roof.
Digital Roof Management Systems – These systems provide long-term monitoring of your roof, giving you real-time data that helps you know when to schedule roof assessments, plan proactive maintenance and track repairs. Using our digital roof management systems can help you minimize unexpected issues and ensure your roof remains in excellent condition.

How Professionals Fix Roof Leaks

At HRS Commercial Roofing, our meticulous roof leak repair process has been developed according to industry best practices and based on decades of experience fixing roof leaks. It involves the following steps.

Locating the Leak Source

The first step in our process is to determine the precise source of the roof leak. Water can travel along structural elements, so the leak may not originate near the location where you’re seeing water inside your building. Our thorough commercial roof inspection services include the advanced diagnostic methods discussed above to ensure we locate the leak source. This will allow us to determine the best solution to fix your roof leak.

Removing Damaged Materials

The next step in our commercial roof leak repair process involves removing all damaged materials causing the leak. The roof membrane is cleaned to remove dirt, debris and existing adhesives. This allows us to more accurately assess the damage. Then, our team will cut out punctured or loose sections in preparation for repairs.

Sealing Seams and Flashing

Minor cracks in seams or compromised sections of flashing will be repaired first. Our team will reapply sealants or reweld seams as needed. We’ll also replace damaged flashing.

Membrane Patch Repairs

If you have punctures or small tears in the roof membrane, we’ll cut a patch to the appropriate size of the damage. These patches will be secured to the membrane using adhesives or hot-air welding to create a durable and watertight bond. All patch repairs must be compatible with the existing roofing membrane to maintain the integrity of the commercial roofing system.

Waterproofing Reinforcement

Waterproofing reinforcement is performed to help prevent future leaks. Our team will brush or roll a base layer of liquid coating over seams, penetrations, transitions and other high‑stress areas. Then we’ll embed polyester fleece or fabric strips, pressing them tight so the material is fully saturated with no wrinkles, gaps or air pockets. A second pass of coating is then applied over the fleece to encapsulate it, creating a flexible, reinforced “bandage” that can move with the building and resist splitting or abrasion.

Final Testing

Once the leak repair has been completed, our team will perform moisture testing to confirm the leak has been sealed correctly.

Types of Commercial Roofs and Leak Repair Solutions

At HRS Commercial Roofing, we take a customized approach to commercial leak repair. There are a variety of different roof systems used with commercial buildings, and the right leak repair solution will depend on your specific commercial roofing system.

Flat Roof Leak Repair

Flat roofs are popular for commercial properties due to their durability, affordability and practical use of space. There are several different flat roof leak repair techniques, and our team will recommend the right solutions based on your specific issue:

Patching Small Leaks and Tears – Leaks caused by small punctures or tears can be repaired by targeted patching of the damaged areas. We use special roofing patches and sealants designed for flat roofs, and we reinforce these patches with waterproof tape or liquid rubber to provide additional durability.
Protective Roof Coatings – Protective roof coatings are used to seal minor cracks in a flat roof. Depending on your roofing material, we’ll use silicone, acrylic or elastomeric coatings to provide the proper waterproof protection and UV ray reflection.
Replacing Damaged Membranes – If your roof has sustained severe membrane damage, our team will remove the damaged section and install a new waterproof membrane.
Tapered Systems for Drainage – If your leak is caused by ponding water, the repair will require a new drainage solution. Our team uses tapered insulation systems to create a gentle slope that allows the water to flow towards your roof drains. We’ll also add extra drain points to improve water flow and reduce the risk of future ponding.
Repairing Flashing – When your leak is caused by damaged flashing, we’ll remove the old, damaged portions and reinforce the area with new weather-resistant flashing materials.

TPO Roof Leak Repair

TPO roof systems are highly durable, energy efficient and affordable, making them one of the most popular commercial roof systems. When repairing a TPO roof leak, our team will clean the damaged section of the membrane and remove any torn or blistered sections. We’ll prepare a TPO patch matching the thickness of your existing membrane that extends at least three inches past the damaged section on all sides. The patch is secured to your TPO membrane using a hot-air welding tool to create a durable, watertight bond. A UV-resistant sealer is applied for additional protection.

EPDM Roof Leak Repair

EPDM roof systems provide excellent protection against impact damage, making them a popular solution in Denver where hail storms can wreak havoc on commercial roofs. Our team repairs EPDM roof leaks by cleaning and drying the damaged area of the roof membrane. Then, we’ll apply a patch to the damaged region using an adhesive material and thoroughly seal all the edges of the patch for added durability.

Metal Roof Leak Repair

Metal roof systems are popular on commercial buildings because they offer long service life, strong wind and hail resistance, low maintenance, and high reflectivity that can help reduce cooling costs. When leaks occur, they often develop at panel seams and fasteners where movement and weathering break down old sealants.

Our team repairs metal roof leaks by cleaning the area and lightly grinding the leaking seam to remove rust, oxidation and failed caulk so new materials can bond. Then we apply a compatible silicone or high‑performance sealant along the seam and embed a polyester fleece strip into the wet sealant. A second layer of sealant or coating is applied over the fleece, encapsulating it and creating a reinforced, flexible “bridge” over the seam to restore waterproofing and accommodate the expansion and contraction of the metal panels.

Modified Bitumen Roof Leak Repair

Modified bitumen roofs are a common choice for commercial buildings because they combine the durability of asphalt with added polymers, creating a tough, multi‑ply system that stands up well to foot traffic and temperature swings. When leaks develop, our team will clean and dry the affected area, then cut out any blisters or loose material. For localized issues, we install compatible modified bitumen patches over the damaged area, tying into the surrounding membrane and sealing edges carefully. For broader areas of aging or recurring leaks, we may apply spray foam or fluid‑applied coating systems over the granulated surface to create a seamless waterproof layer.

workers fixing an emergency commercial roof leak

Emergency Commercial Roof Leak Repair

When disaster strikes your commercial building, you may need assistance right away to address a leak before it causes significant damage to your property. At HRS, we offer emergency commercial roof leak repair services to safeguard your property after a severe storm or any other incident that damages your roof. We offer 24/7 emergency response services and can be at your property shortly after receiving your call, day or night.

Our emergency roof leak repair services involve the following steps:

24/7 Rapid Response – Our team is ready to respond at a moment’s notice when you experience a roofing emergency.
Damage Assessment – We’ll evaluate the situation to determine the cause, location and severity of your roof leak.
Temporary Protection – We’ll work quickly and efficiently to stop active leaks and prevent further damage with temporary sealing, tarping or other weatherproofing measures.
Permanent Repairs – Once the leak has been controlled, we’ll explain the permanent repairs necessary to restore your roof. We’ll answer any questions you have to ensure you understand our recommendations. Once you approve our recommended plan, we’ll handle all roof repairs in a timely manner.
Follow-Up Inspection – We’ll carefully inspect all work to ensure it was completed correctly and all leaks have been repaired.

Our team will also provide all required documentation to your insurance company and coordinate directly with your insurance to streamline the claims process and ensure you receive the full benefits to which you’re entitled.

Preventing Future Commercial Roof Leaks

Preventive maintenance is the best way to prevent future leaks from developing. We recommend that you take the following steps to protect your roof and reduce the risk of developing a leak that causes significant damage to your building:

Routine Roof Inspections – Scheduling professional roof inspections twice a year will ensure you catch damage to your roof in its earliest stages. During these inspections, our team will check for signs of wear, clogged drains and other issues that can lead to leaks.
Proactive Roof Maintenance – Our team provides comprehensive commercial roof maintenance services to clean debris, seal cracks and make small repairs in a timely manner.
Drainage System Maintenance – Poor drainage is one of the most common causes of roof leaks. Make sure your gutters, downspouts and roof drains remain clear of debris so that your drainage system works properly. Our team can perform these services for you during your preventive maintenance appointments.

Cost Factors for Commercial Roof Leak Repair

The cost to repair a leak at your property can vary significantly, and the only way to get an accurate price estimate is to schedule a professional roof assessment. In general, the cost of your commercial roof leak repair will depend on the following factors.

Roof Type and System Complexity

Different roof systems require different materials and repair methods, which affects labor time and material cost. Single‑ply membranes, multi‑ply modified bitumen, metal panels and spray foam all have their own compatible sealants, primers and patch products, so the more specialized or complex the system, the higher the repair cost tends to be.

Leak Severity and Extent of Damage

A small, localized puncture or seam split is faster to address than a leak that has spread moisture through insulation, decking or interior finishes. As leaks become more severe, repairs will often become more complex, which increases the overall cost.

Location of the Leak and Difficulty of Roof Access

Easy, ground‑level access with clear staging areas keeps labor efficient, while roofs that require special lifts, long ladder runs or complicated site logistics add time and equipment costs. Leaks near edges, steep sections or over sensitive interior areas may also require extra safety measures and protection, which further increases the effort and cost involved in the repair.

Repair Method and Materials Required

Simple spot repairs with basic patching are less expensive than large‑area restorations that involve reinforcement, coatings or system overlays. Higher‑end materials such as premium coatings, fleece‑reinforced details or upgraded flashing assemblies can add upfront cost but may be necessary to extend the life of your roof.

Emergency vs. Scheduled Service

When a leak is active during a storm or threatening business operations, it may require emergency repair services. Rush mobilization, overtime labor and temporary measures to stop water intrusion can add to the cost compared to planned, non‑urgent repairs that can be scheduled into our team’s normal workflow.

When a Commercial Roof Leak Requires Repair vs. Replacement

There are some situations when repairing a leak on your commercial building simply doesn’t make sense. The following factors will help you determine when it’s best to repair the leak vs. replace your roof.

Age of Roof

The age of your roof should impact your decision regarding whether repairing a leak is worth the investment. If your roof has reached 75-80% of its lifespan, making repairs will deliver less value since you’ll likely only get a few more years out of your roof before it needs to be replaced. In these situations, it typically makes more sense to replace the roof.

Percentage of Roof Membrane Affected

A leak caused by an isolated puncture is a much different problem than a leak caused by systemic membrane failure. Targeted repairs for a leak caused by localized damage to your roof membrane will be much easier and cost much less than repairs required when there is extensive roof membrane failure associated with widespread cracking or blistering. In general, if more than 25-30% of the membrane is affected, leak repairs typically don’t make sense.

Structural Damage

If there is structural damage to the deck below the roof membrane, then repairing the membrane won’t solve the problem. Deck repair to address structural damage adds a significant cost to your commercial roof leak repair, and replacing the roof is generally the better approach in these situations.

Cost Comparison

When evaluating the value you’ll receive for your investment, you should always compare the cost of the leak repair vs. the cost of a full roof replacement. In general, it’s best to replace the roof if the cost of repairs exceeds 50% of the cost of replacement.

Why Professional Commercial Roof Leak Repair Matters

While roof leak repairs may seem like a simple task that your facilities manager can handle, it’s important to understand that DIY roof leak repairs can introduce serious issues. Due to the following risks associated with DIY leak repairs, it’s best to have these problems addressed by a professional commercial roofing company:

Inadequate Repairs – Commercial roofing systems are highly complex. They consist of multiple layers that work together to provide the protection your building needs. If you don’t understand how all these complex layers work together, you risk making inadequate repairs that fail to address hidden moisture beneath the surface or that compromise the integrity of your entire roof.
Safety Hazards – Working on a commercial roof can be very dangerous due to the height of the building and the slope of the roof. Without the proper safety equipment and training, your team faces an increased risk of a serious injury.
Warranty Issues – In most situations, the warranties on roofing materials are only valid when they’re installed or repaired by certified roofing professionals. Making repairs on your own can potentially void your warranty, exposing you to expensive future repair costs if you don’t address the leak properly or if another issue arises due to inadequate repairs.

Professional roofing companies have the equipment and experience to handle the challenges associated with repairing complex commercial roofing systems. When you have your leak fixed by a professional, you’ll ensure the repairs are completed safely and correctly. This is the best way to minimize disruption to your operations and ensure your roof performs well for years to come.

Industries We Serve

HRS Commercial Roofing provides commercial roof leak repair services for buildings used in a wide range of industries, including:

roofing worker cutting insulation bitumen material rolls

roofers installing waterproofing membrane and asphalt bitumen shingle on flat roof

Why Choose HRS Commercial Roofing

HRS Commercial Roofing has been the leading commercial roofing company in the Denver area for over 50 years, providing commercial roof leak repair and commercial leak detection services for buildings throughout the region. We’re a subsidiary of Haselden Construction, a third-generation, family-owned company with a reputation for integrity and exceptional quality workmanship. Our goal is to cultivate a long-term relationship with you. As your dedicated roofing partner, we’ll be there to handle any roofing needs that arise, whether it’s fixing a leak, providing routine maintenance or replacing your roof.

You’ll experience a variety of benefits when you partner with HRS Commercial Roofing, including:

Experience working with all major commercial roof types
Fast response times
Honest, straightforward recommendations
High-quality workmanship
Clear, transparent communication

Contact us today to schedule a roof assessment. HRS Commercial Roofing serves clients in Denver and throughout the Rocky Mountain region.

Request an Assessment

Commercial Roof Leak Repair FAQs

The following frequently asked questions address common concerns about commercial roof leak detection and commercial roof leak repair.

How do you find a leak in a commercial roof?

A commercial roof leak is found by identifying the exact location where water penetrates the roofing membrane, which is often different from the location where water appears inside the building.

Water can travel along insulation layers, structural decking and membrane seams before reaching the interior. Because of this movement, professional leak detection focuses on locating the breach in the waterproof roofing system, not the interior water stain.

Commercial leak detection usually begins with a visual inspection of the roof surface. Our contractors examine common failure points where water enters the roofing system, including:

Membrane punctures or tears
Separated seams in the roofing membrane
Deteriorated flashing around roof penetrations
Ponding water areas that stress the membrane
Damage near HVAC units, skylights or vents

If the source is not visible during inspection, our contractors may use advanced detection methods such as:

Infrared moisture scanning, which identifies areas of trapped moisture beneath the membrane
Electronic leak detection, which locates breaches in the waterproof membrane
Controlled water testing, which isolates roof sections to confirm the leak source

Accurate commercial leak detection allows contractors to repair the actual entry point of water, which prevents recurring leaks and ensures the roof leak repair addresses the root cause.

How much does commercial roof leak repair cost?

Commercial roof leak repair cost depends primarily on the roof type, damage size and amount of moisture trapped beneath the roofing membrane.

Commercial roofing systems vary significantly in design and materials, so repair cost is usually determined after a roof inspection and commercial leak detection assessment.

Several factors influence the scope and cost of repair, including:

Roofing System Type – Different systems require different repair methods. TPO, EPDM and PVC membranes are repaired differently than metal roofing or built-up roofing systems.
Extent Of Membrane Damage – Small punctures or seam separations may only require localized patch repairs, while larger damaged areas may require removal and replacement of surrounding membrane sections.
Moisture Beneath The Membrane – If insulation layers are saturated, those materials must usually be removed and replaced before the roof can be sealed properly.
Roof Penetrations And Flashing – Leaks around equipment curbs, skylights, vents and parapet walls often require flashing repair or reconstruction.

Because each commercial roofing system and leak condition is different, our contractors will provide a repair estimate after completing leak detection and evaluating the roof assembly.

Can a flat roof leak be repaired?

Most flat roof leaks can be repaired when the roofing system is structurally sound and the damaged area is limited.

Commercial flat roofs are typically built with repairable membrane systems which allow our contractors to isolate and repair damaged sections without replacing the entire roof.

Repair methods vary based on the roofing material:

TPO and PVC roofs are usually repaired by heat-welding a compatible membrane patch over the damaged area.
EPDM rubber roofs are typically repaired using adhesive-bonded patches designed for rubber membranes.
Modified bitumen roofs may be repaired with heat-applied patches or reinforced waterproof coatings.

Repair may not be appropriate when the roof has:

Widespread membrane deterioration
Multiple recurring leaks across the roof surface
Extensive saturated insulation beneath the membrane
Structural damage to the roof deck

In those situations, our contractors may recommend roof restoration or roof replacement rather than repeated attempts to fix roof leaks.

How long does commercial roof leak repair take?

Most commercial roof leak repairs can be completed in a few hours to one day, depending on the size of the damaged area and the repair method required.

The process typically includes three stages.

Leak Detection and Inspection – Technicians locate the source of water intrusion and assess surrounding roofing materials
Preparation of the Repair Area – Damaged membrane sections and saturated insulation are removed so new materials can be installed on a stable surface
Repair and Waterproof Sealing – The damaged area is patched, sealed or reinforced using materials compatible with the roofing system.

Small membrane punctures or seam failures can often be repaired quickly. Repairs involving insulation replacement or flashing reconstruction may require additional time.

Weather conditions can also affect repair timing because roofing materials must be installed on dry surfaces to achieve proper adhesion and waterproof performance.

Is a leaking commercial roof an emergency?

A leaking commercial roof becomes an emergency when active water intrusion threatens building operations, equipment or structural components.

Emergency conditions commonly include:

Water entering occupied interior areas
Exposure of electrical systems or sensitive equipment
Ceiling collapse risk caused by saturated materials
Rapid water intrusion during severe storms

When these conditions occur, our roofing technicians may perform temporary emergency leak control before permanent repairs are completed. Temporary measures can include sealing the leak location, installing waterproof coverings or redirecting water away from the damaged area.

Even small leaks should be addressed quickly. Water entering a commercial roofing system can spread through insulation layers and structural decking, increasing repair complexity and cost.

Prompt commercial roof leak detection and repair helps protect the building structure and prevents recurring water intrusion.