PVC Roofing System

Protect your property with a PVC Roofing System, designed for flat and low-slope roofs that require strong waterproofing, energy efficiency, and durability. Its heat-welded seams help resist leaks, chemicals, and harsh weather while keeping your roof clean, reliable, and easy to maintain.

Protect your commercial building with a PVC roofing system built for the harshest rooftop conditions. This reflective, heat-welded single-ply membrane resists grease, chemicals, and fire while keeping interiors cooler, backed by expert Markit Roofing installation.

At Markit Roofing, we provide professional PVC Roofing System solutions for flat and low-slope commercial properties that demand more than ordinary waterproofing. PVC, or polyvinyl chloride, is a plasticized single-ply membrane reinforced with a polyester scrim, giving it the flexibility to move with your building and the strength to resist ponding, punctures, and industrial fallout. Its factory-white surface reflects solar heat, and its chlorine content adds real fire and chemical resistance.

Our certified crews install, repair, and maintain PVC across Calgary and Edmonton, hot-air welding every seam into a monolithic bond and detailing each edge, drain, and penetration by hand. Whether you are roofing a restaurant, a plant, or a warehouse, we build to manufacturer specification and prove the roof is sealed before we leave.

What is a PVC Roofing System?

A PVC roofing system is a single-ply membrane made from polyvinyl chloride, the same base polymer used in piping, blended with plasticizers that keep it flexible and reinforced with a woven polyester scrim for tensile strength. It arrives in rolls, is laid over flat or low-slope decks, and is joined with hot air rather than adhesive. First adopted for commercial roofs in the 1960s, PVC became a go-to membrane wherever chemical exposure, grease, or fire risk make cheaper options inadvisable. Its surface is usually bright white, reflecting sunlight to keep the roof and the space below it cooler.

Building owners choose PVC when performance matters more than the lowest upfront price. The welded seams create a continuous, watertight skin that resists the leaks common to taped or mopped roofs, while the membrane itself resists oils, animal fats, solvents, and industrial exhaust that would degrade other materials. It remains weldable for repairs years after installation, self-extinguishes when exposed to flame, and typically serves 20 to 30 years with light maintenance. For restaurants, factories, and any roof exposed to harsh chemicals, PVC delivers value that outlasts its cost.

Types of PVC Roofing System

No single method fits every PVC roof. The membrane can be fastened, glued, or bonded with concealed plates, and higher-grade formulations are available for roofs that demand extra flexibility or longevity. The right build depends on roof height, wind exposure, the deck beneath, chemical load, and budget. Matching both the attachment and membrane grades to those conditions is what keeps a PVC roof tight, flat, and wind-resistant throughout its full service life.

Mechanically attached systems fix the membrane through the insulation and suit large, exposed roofs, while fully adhered builds bond it down for a smooth, wind-resistant finish. Induction-welded and fleece-backed options add uplift resistance or puncture strength, and KEE formulations extend flexibility and lifespan. The right combination always follows a trained roofer’s on-site assessment.

Our Process

Roof Inspection and Planning

Every PVC project starts with our team on your roof, not behind a desk. We measure the deck and record its slope, drainage paths, and the condition of the existing membrane, insulation, flashings, curbs, and penetrations, noting any ponding, blistering, or moisture trapped below. Because PVC is so often specified for buildings with grease exhaust or chemical output, we also map where those loads land.

What we find sets the recommendation you receive, from membrane gauge and fastening pattern to insulation value and added reinforcement where loads concentrate. Planning in this level of detail up front prevents costly surprises and gives your PVC roof the best chance to deliver its full chemical, fire, and energy performance.

Surface Preparation

With the specification agreed, we turn to the deck so the new PVC membrane has a sound, even base to bond to. We strip failed materials, replace wet or damaged insulation, make deck repairs, and set down cover board or fresh insulation to leave a smooth, dry, stable surface. A clean base is important here because any bump left beneath the thin membrane shows through and can load the welded seams unevenly.

We also correct drainage so water clears the roof instead of pooling, since standing water shortens the life of any flat system. Only once the substrate is level, dry, and secure do we begin laying membrane, a discipline that protects both your warranty and the waterproofing you are paying us to deliver.

PVC Membrane Installation and Review

We position the PVC sheets and secure them by the chosen method, then complete the seams with hot-air welding at controlled temperatures. Fusing the laps with heat forms one continuous membrane whose joints are stronger than the sheet itself, which is why welded PVC outperforms glued or taped systems in the field. Edges, drains, curbs, and every penetration are detailed with reinforced PVC and welded flashings, so the roof’s weak points become its strongest.

When the field is complete, we probe the seams and, where warranted, flood-test the roof before sign-off, correcting anything that falls short of spec. You receive clear care guidance, and because PVC asks little of you, upkeep is generally a debris clear-off and one professional check each year.

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What can you expect from Markit Roofing?

Choose Markit Roofing for a PVC roof, and you get certified welders who follow manufacturer specifications to the letter and work around your operations, not over them. We communicate clearly, hold the schedule, keep the work area clean and safe, and hand back a chemical-resistant, energy-smart roof under a warranty that carries real weight.

Durable

Reinforced PVC stands up to foot traffic, hail, ponding, and the oils and solvents that eat away at other membranes, with a service life that commonly reaches 30 years. Because the seams are welded rather than glued, the joint that fails first on budget roofs simply is not there.

Safe

PVC is inherently fire-resistant and self-extinguishing due to its chlorine content, and controlled hot-air welding avoids the open flames used by some other systems. Secure attachment keeps the membrane stable under Alberta wind and heavy snow loads.

Dependable

We install in accordance with certified procedures, test the seams we weld, and back the finished roof with strong material and workmanship warranties. That means your PVC roof keeps shedding water and resisting chemicals reliably, year after year.

FREQUENTLY ASKED QUESTIONS

1. How long does a PVC roof last?

A well-installed, well-maintained PVC roof typically lasts twenty to thirty years, and thicker or KEE-based membranes can push toward the upper end of that range.

2. Why is PVC so well suited to restaurants and factories?

PVC resists animal fats, oils, solvents, and the acidic exhaust vented from kitchens and industrial processes, the same chemicals that break down other membranes far sooner.

3. How does PVC compare to TPO?

Both are hot-air-welded single-ply membranes, but PVC holds a clear edge in chemical resistance, fire performance, and long-term flexibility, while TPO usually costs a little less up front.

4. Can PVC be installed over my existing roof?

Often yes. When the deck and insulation test dry, sound, and code-compliant, we can install over them and skip a full tear-off, and we confirm suitability during the inspection.

5. Is a PVC roof energy-efficient?

Yes. Its reflective white surface turns back solar heat, easing summer cooling demand, and many PVC membranes qualify as cool roofs eligible for energy rebates.