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    Commercial Roof Penetration & Curb Installation

    At Markit Roofing, we provide expert commercial roof penetration and curb installation services for businesses that need safe, weather-tight roof openings for vents, HVAC units, pipes, exhaust systems, skylights, and other equipment. Roof penetrations must be installed correctly because even a small mistake can lead to leaks, insulation damage, structural issues, and costly repairs.

    Our skilled team carefully plans every penetration and curb detail to match your roofing system and equipment requirements. We focus on proper sealing, durable materials, clean workmanship, and long-term roof protection, helping your commercial property stay functional, efficient, and protected in all weather conditions with dependable lasting results.

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    commercial roof curb installation

    Secure Roof Openings with Proper Curb Installation

    Commercial roof penetrations require precision, experience, and proper waterproofing from the start. We install roof curbs and openings with careful attention to flashing, sealing, drainage, and roof membrane protection. Whether you are adding new equipment or replacing old roof curbs, our team helps prevent leaks and supports better performance for your building system with every professional installation project completed correctly.
    • Roof Penetration Planning
    • Commercial Roof Curb Installation
    • Flashing & Waterproof Sealing
    • HVAC & Equipment Support Curbs
    Every roof opening can create a potential weak point if not handled professionally. We help reduce that risk through accurate planning, secure curb installation, and dependable weatherproofing. Our goal is to create a strong connection between your equipment and roofing system so your commercial property remains protected, reliable, efficient, stronger, safer, and ready to confidently operate daily.

    Our Process

    Site Review and Requirement Check

    Our process begins with a detailed site review to understand your commercial roof, equipment needs, and installation requirements. We check the roof type, deck condition, existing membrane, drainage direction, equipment size, curb placement, and surrounding roof areas. This helps us determine the safest and most effective way to create or modify a roof penetration.
     
    We also consider building use, access points, weather exposure, and future maintenance needs. Careful planning at this stage helps prevent leaks, poor fit, structural concerns, and unnecessary disruption during installation work, ensuring your property and staff’s safety every day.

    Accurate Layout and Curb Preparation

    After the site review, we prepare the proper layout for the roof penetration and curb installation. Our team carefully marks the location, confirms dimensions, checks equipment alignment, and prepares the roof surface for safe work. We make sure the curb size, height, and placement support both the roofing system and the equipment being installed.
     
    Proper preparation is important because incorrect measurements can create drainage problems, flashing gaps, and leak risks. This step helps ensure the installation is neat, secure, accurate, and suitable for long-term commercial roof performance and protection after successful completion overall.

    Professional Installation and Waterproofing

    Once preparation is complete, our team performs the roof penetration and curb installation using reliable materials and proven roofing methods. We cut and install with care, secure the curb properly, and apply flashing, sealing, and membrane detailing to protect the roof opening. We focus on creating a strong weather-tight barrier around the penetration, especially where water may collect or flow.
     
    Our workmanship helps prevent moisture entry, equipment instability, and roof damage. The installation is completed with safety, cleanliness, and minimal interruption to your business operations, from beginning to end, every time, professionally.

    Final Inspection and Protection Guidance

    After installation, Markit Roofing completes a final inspection to confirm that the curb, flashing, sealing, and surrounding roof areas are properly finished. We check for open gaps, weak seals, drainage concerns, loose materials, and any detail that could affect long-term protection. Our team also provides simple guidance for future maintenance and inspection, especially around penetrations where leaks often begin.

    This final step gives business owners confidence that the new roof opening is secure, weather-resistant, durable, and ready to support equipment performance while protecting the commercial roofing system over time, always ahead.

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    Different Types of Roof Curbs & Penetrations We Install

    HVAC roof curbs, exhaust fans, and heavy equipment on flat commercial roofs in Calgary and Edmonton require well-insulated roof curb installation. Constructed from galvanized steel or aluminum with rigid fiberglass or polyiso foam insulation, they minimize thermal bridging and condensation in cold climates while ensuring compatibility with TPO, EPDM, and PVC membranes. Factory-assembled or custom options include wood nailers for seamless membrane attachment, delivering full code compliance and load-bearing capacity.

    Suitable for lighter-duty commercial roof penetrations such as plumbing vents, pipes, and access hatches where thermal performance is secondary. These durable galvanized steel or aluminum curbs feature flanged bases for secure attachment and are customized in height and size for optimal flashing in warehouses, retail centers, and other commercial facilities facing Alberta’s changing weather.

    These angled roof curbs promote superior water shedding on low-slope roofs, reducing ponding risks in Alberta’s snowy and rainy conditions. Ideal for skylights, vents, or equipment, they incorporate raised edges and tapered insulation support for smooth membrane integration and enhanced durability against freeze-thaw cycles.

    Expert retrofit roof curbs allow upgrades or replacements without removing existing commercial roof penetrations. Two-piece or adaptor designs integrate easily with current systems, making them perfect for older BUR or mod-bit roofs. We minimize business downtime while adding reinforcements and sealants specifically adapted to Alberta’s harsh environment.

    Best Materials for Roof Curbs & Penetrations

    In Calgary and Edmonton we use high quality weather resistant curb and penetration installation materials. Alternatives such as galvanized steel are affordable in terms of strength and corrosion protection, whereas aluminum is lightweight and can withstand corrosion. Rigid foam or fiberglass insulated models will make them more energy efficient when it is extreme cold. The materials are all in line with Alberta codes, which guarantees the ability to maintain long watertight integrity, low maintenance, and the best performance in the presence of hails, snow, and UV.

    Galvanized Steel Curbs

    Galvanized steel is an ideal material to be used on the curbs of the roofing of the commercial buildings in Alberta because it is very strong, cheap and it does not corrode easily because it has a zinc coating. It can support a heavy load of HVAC units, snow and other heavy loads typical of Calgary and Edmonton. Our 16-18 gauge is durable and optional membrane attaching insulation and wood nailers are provided. It is suitable in either new installations or retrofits with long service life under conditions of proper flashing in severe freeze thaw cycles.

    Aluminum Curbs

    Aluminum curbs are efficient in lightweight usage and they do not rust at all hence they are suitable in Alberta due to the humid summer and the corrosive winter salts. They are often 0.063-0.080 inches thick, which is appropriate to metal buildings and conventional roofs. Our curbs are completely assembled aluminum in order to be installed as a pre-assembled or custom curb with insulation. This is because their natural corrosion resistance will minimize the long-term maintenance and hence, they will be reliable to support the penetrations in fluctuating weather.

    Insulated Curb Systems

    To reduce heat loss and condensation in commercial flat roofs, insulated curbs using rigid fiberglass or polyiso foam are used to minimize heat loss and condensation. Necessary in cold winters in Edmonton, they are energy-saving and eliminate interior moisture problems. They are matched with compatible TPO/EPDM/PVC membranes flashing. These systems comply with thermal bridging control code, which offers better performance to the temperature extremes of Alberta as well as sustainable building objectives.

    Stainless Steel Curbs

    Stainless steel curbs have high quality corrosion resistance to high exposure or chemically heavy conditions such as industrial facilities in Calgary/Edmonton. They are more expensive, but they are more durable and do not rust with wet or polluted environment. We make them on critical penetrations where maximum service is essential. They provide unmatched weatherproofing and structural integrity in the harsh business environment when used together with appropriate sealing.

    Custom Fabrication Materials

    Special requirements in custom curbs include galvanized with aluminum flashing or coated steels. Customized to fit special penetrations (such as large exhausts or seismic zones) they are reinforced, vented or secured. Our choice of materials depends on the type of roof, load and exposure of the roof, compliance with codes and maximum integration in the Alberta climate to give a leak-free and long-lasting performance of all fields.

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