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    Commercial Roof Installation & Replacement Service

    A commercial roof replacement is a major capital decision, and it deserves a contractor who treats it as one rather than a quick tear-off and re-cover. When your existing roof has reached the end of its service life, a well-planned installation protects the building, the people inside, and the investment for decades, while a rushed one leaves you paying twice.

    Markit Roofing installs and replaces commercial and industrial roofs across Calgary and Edmonton, guiding you from the first survey through system selection, scheduling, and the final walkthrough. We help you weigh whether a full tear-off or a recover is right for your building, choose a roofing system suited to Alberta conditions and your budget, and phase the work so your operations keep running with minimal disruption.

    Our certified crews handle removal, decking repair, new membrane installation, and clean disposal, all documented and backed by strong warranties. The result is a roof specified for your building rather than a generic install, delivered on a clear timeline with honest advice at every decision point, so the investment you make now performs reliably through the winters ahead.

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    When Replacement Beats Another Repair

    There comes a point where patching a failing roof costs more than replacing it. Repeated leaks, widespread membrane failure, saturated insulation, and a roof past its designed lifespan all signal that repairs are only buying short intervals between problems. Continuing to repair an exhausted roof drains budget unpredictably and risks sudden failure over occupied space. A planned replacement resets that clock, restores full weather protection, and lets you budget for a single controlled investment instead of an open-ended series of unpredictable call-outs over occupied floor space.
     
    What a Full Replacement Involves:
    • Removing the old roofing system down to a sound substrate
    • Inspecting and repairing the decking beneath before anything new goes on
    • Correcting drainage, slope, and insulation where the old design fell short
    • Installing the new membrane system with proper detailing at every penetration
    • Disposing of old material responsibly and leaving the site clean
    Each of these stages affects how long the new roof lasts, which is why we do not skip or rush any of them. The decking and drainage work, in particular, are where a cheap install cuts corners and where hidden problems surface a few years later. By addressing the substrate, water movement, and detailing during replacement, we ensure the new system performs to its full lifespan rather than inheriting the faults that ended the old one.

    Our Process

    Survey, Assessment, and System Selection

    Every replacement starts with a thorough survey of the existing roof, because the right new system depends entirely on what is already there. We assess the current membrane, the decking condition, drainage, insulation, and how the roof is used, then discuss whether a full tear-off or a recover suits your building. From there, we help you choose a roofing system, weighing membrane type, energy performance, expected lifespan, and budget rather than pushing a single product.
     
    This stage is where the highest-cost and longevity decisions are made, so we take the time to explain the trade-offs clearly. You finish it understanding exactly what is being installed, why it fits your building, and what it will cost, with no surprises waiting later in the project.

    Planning the Work Around Your Operations

    A replacement is disruptive only if it is planned badly. Once the system is chosen, we build a schedule that aligns with how your building actually operates, sequencing the work to keep occupied areas usable and access routes open wherever possible. For buildings that cannot fully close, we phase the tear-off and installation section by section so you are never fully exposed and rarely fully shut down.
     
    We confirm timelines, material lead times, and any weather contingencies up front, and we coordinate with you on noise, deliveries, and site access. This planning is what separates a smooth commercial replacement from a project that stalls your business. The goal is a clear, agreed programme so you know what is happening on your roof and when, from the first day to handover.

    Tear-Off, Decking, and Installation

    With the plan agreed, we remove the old roofing system and expose the substrate so nothing is hidden. The decking is inspected and repaired where needed, as installing a new membrane over compromised decking would waste the entire investment. We then correct drainage and insulation shortcomings and install the new system with careful detailing at seams, edges, drains, and every penetration, since these transitions are where roofs most often fail.
     
    Our certified crews work to the manufacturer’s specification so the warranty stands, not just to what looks finished from the ground. Throughout, we keep the site controlled and weather-tight as work progresses, so an open roof section is never left vulnerable overnight and your building stays protected during the changeover.

    Final Inspection, Cleanup, and Handover

    A replacement is not done when the last sheet is laid. We carry out a detailed final inspection of the completed roof, checking every seam, flashing, and drain against specification and confirming water moves off the roof exactly as intended. Old material is removed and disposed of responsibly, and the site is left clean, with nothing for your team to deal with afterward.
     
    We then walk you through the finished roof, explain the warranty and what it covers, and hand over full documentation of the system installed. This closing stage gives you a clear record for your files and insurer, and the confidence that the new roof was finished to standard rather than simply signed off. You leave the project knowing exactly what you have and how well it is protected.

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    Why Choose Markit Roofing for Your Replacement

    The single biggest decision in a replacement is whether to fully tear off or recover the existing roof, and it has real cost and lifespan consequences. We give you a straight recommendation based on your decking condition, insulation, and how many layers are already up there, not on which option is easiest for us. A recover can save money when the substrate is sound, but it is the wrong call over saturated insulation or failing decking. Because we assess honestly and explain the reasoning, you make this decision with full information rather than being steered toward the choice that suits the contractor. That honesty at the outset protects your investment for its entire life.
    A commercial roof in Calgary or Edmonton faces freeze-thaw cycles, heavy snow load, hail, and sharp temperature swings, so the system has to be specified for that exact reality. We match membrane type, insulation value, and detailing to how your building is used and what our climate demands, rather than installing whatever is standard. That means a roof that handles snow load and drainage properly, resists hail and wind, and holds its performance through Alberta winters year after year. Correct specification at the design stage determines whether a new roof reaches its full lifespan, and it is where we put careful attention before a single sheet is installed.
    A manufacturer’s warranty is only as good as the installation behind it, and poor workmanship voids coverage no matter how good the materials are. Our certified crews install to specification so the warranty actually stands when you need it, with proper detailing at the vulnerable transitions where roofs tend to fail first. We document the system and the installation so you hold clear proof of exactly what was fitted and how it was done. This matters most years down the line, when a warranty claim depends on the roof having been installed correctly in the first place. You are getting workmanship that keeps the warranty valid, not just a roof that looks complete on handover day.
    A replacement involves survey, tear-off, decking, installation, and cleanup, and problems creep in when those stages are split between disconnected trades. We handle the whole project ourselves, so one accountable team carries it from the first assessment to the final walkthrough. That continuity means the crew installing your roof already understands the decisions made at survey, and nothing gets lost in a handoff between contractors. You deal with one point of responsibility, one clear programme, and one team standing behind the finished roof. For a capital project of this size, that single line of accountability is what keeps the work on track and the result something we can warranty with confidence.

    Planning Your Roof Replacement Investment

    A roof replacement is a significant, infrequent decision, so it helps to understand what shapes the cost, the timeline, and the long-term value before you commit to the project. This section covers the practical questions building owners weigh when planning the investment, from what drives the price to how long the work takes and what determines the lifespan of the new roof. The aim is to help you plan the project and its budget with clear expectations, so the decision you make is informed rather than rushed under the pressure of a roof that is already failing over your operations.

    What Shapes the Cost of a Replacement

    commercial roof reair & maintenance
    Several factors drive the price of a commercial roof replacement: the roof’s size and complexity, whether it needs a full tear-off or a recover, the condition of the decking underneath, and the membrane system you choose. A straightforward tear-off on sound decking sits at one end of the range, while extensive substrate repair and a premium system sit at the other. We quote against your actual roof after surveying it, so the figure reflects the real scope rather than a rough rate.

    Why Decking and Drainage Affect the Figure

    The parts of a replacement you cannot see from the ground often shape the budget most. Saturated insulation, rotten decking, or drainage that never worked all add scope properly once the old roof comes off. Rather than spring these on you as surprises, we survey thoroughly and flag likely substrate work up front so your budget accounts for it. Correcting these hidden faults during the replacement is what makes the new roof last; skipping them to save money simply shifts the cost a few years down the line.

    How Long the Work Takes

    The timeline depends on the roof size, the chosen system, the weather window, and whether the work is phased around your operations. A single section may take days, while a large or complex roof phased around a working building runs longer by design, to keep you trading throughout. We confirm the programme before starting, including material lead times and weather contingencies, so you have a realistic schedule rather than an optimistic guess that the first bad forecast undoes.

    What Determines the New Roof’s Lifespan

    A commercial roof’s lifespan comes down to three things: the system specified, the quality of the installation, and its maintenance afterward. A well-chosen membrane, installed correctly with proper detailing and sound decking beneath, forms the foundation. Ongoing care then protects that investment for its full design life. This is why we specify carefully and install to the manufacturer’s standard rather than cutting corners that quietly shorten a roof’s working life and bring the next replacement forward.

    Getting the Most From Your New Roof

    The value of a new roof is realised over decades, not on installation day, so a little planning afterward protects it. Keeping drains clear, scheduling periodic inspections, and addressing minor issues early all extend the lifespan you paid for. We hand over the roof with documentation and guidance on caring for it, so you are set up to protect the investment from day one. Treating the new roof as an asset to maintain, rather than something to forget until it leaks, turns a one-time high cost into decades of coverage.

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