Commercial Roof Coating

About the Commercial Roof Coating Process

For commercial long run roofing, ARC roof coatings are installed in four stages. We seal internal gutters using our professional liquid membrane coating to provide a complete waterproof solution. Our comprehensive process ensures that your roof will be restored to the highest level and be waterproof and weathertight.

Our coating reduces heat in your building

Our liquid membrane system not only provides a durable, waterproof barrier but also features reflective properties that help reduce heat absorption. By reflecting sunlight, it significantly lowers the roof’s surface temperature, aiding in cooling the building naturally and reducing energy costs associated with air conditioning.

No interruptions to your business

Additionally, our application process is non-invasive and designed to minimise disruptions. There’s no need for loud machinery or invasive work, allowing businesses to continue operating seamlessly while we complete the project. Our efficient and considerate approach ensures a smooth experience for our clients.

Our coating process is completed within 4 days

Our roof coating service is typically completed between two to four days — dependent on the scope of the job and the weather.

You can trust ARC to protect your investment and be confident in our service with our 5 Year Workmanship Warranty.

Stage 1: Clean

Commercial roofs are waterblasted to remove all dirt and loose and flaking material.

If moss and mould is present, the roof will be treated with ARC Roof Cleaner, a slow release, biodegradable, antifungicide treatment.

Stage 2: Prep and repair

All loose nails will be removed and refixed with screws. All ridges, valleys, and flashings will be checked and repaired or replaced as required.

Stage 3: Treat and seal

Any areas of red or white rust will be treated with a rust converter or anti-corrosive primer to prevent any further rusting and degradation.

Internal gutters are sealed with a professional liquid membrane coating.

Stage 4: Coat

Once the roof is clean and appropriately treated, ARC will apply a liquid membrane roof coating in your chosen colour.

This final step completely seals the roof with a waterproof membrane to protect it for many years to come. Our manufacturer-provided product warranties are 10 years, however, we expect the coating to last well beyond this period.

About ARC's Liquid Membrane Roof Coatings

ARC’s liquid membrane roof coatings protect and revitalise your roof. Unlike regular paint, our coating creates an elastomeric polyurethane waterproof membrane that acts as a secondary barrier for your property. Designed for New Zealand’s weather, our roof coatings provide superior UV resistance to protect roofs from NZ’s uniquely harsh ultraviolet levels.

Elastomeric polymers create a waterproof membrane within the coating
High UV resistance protects roofs from NZ’s harsh ultraviolet levels
Specialised additives, solvents, and water-based carriers create a flexible and highly adhesive coating.

Why choose ARC?

Peace of mind, from the quote to the final coat, we understand that your property is likely your biggest investment — and it deserves to be looked after properly.

At Affordable Roof Coating, we treat every roof as if it were our own, with the care, respect, and attention to detail you should expect from true professionals. We’ve seen what happens when corners are cut: leaks, damage, and disappointment. That’s why we’re committed to doing things the right way — no shortcuts, no surprises, just honest workmanship that lasts.

Here’s what you can expect when you work with us:

Thorough Roof Inspection
Before any work begins, we inspect your roof to ensure it’s suitable for our coating system. If repairs are needed, we’ll let you know straight away — we believe in honesty, not cover-ups.
Proper Preparation
Every roof is pressure cleaned and prepped to the highest standard. We take the time to do it right, because a lasting finish depends on proper prep work.
Ensuring Your Roof is Protected
From replacing cracked tiles and fixing flashing, to repairing or swapping out damaged metal sheets or clear roof lights — we’ve got you covered. We make sure your roof is sound before any coating goes on, so your investment is protected long-term.
Reliable, Local Service
You deal directly with us — no sales reps or middlemen. We’re hands-on, responsive, and treat your property with care and respect.
Guaranteed Workmanship
We back every job with a 5-year workmanship warranty so you can feel secure long after we’ve finished.

Colour options

Whether you’re looking for a colour to match your existing roofing material or if you want to change colour and update the look of your roof, our coating is available in a wide range of colours to suit your needs.

Many of our coating colours are matched to the COLORSTEEL® range and all colours are available for all roof types.