ARC Liquid Membrane Roof Coat

Coating methodology

For all roof types (metal, tile, and decramastic), ARC roof coating is installed in four stages. Our comprehensive process ensures that your roof will be restored to the highest level and be waterproof and weathertight.

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 warranties — 5 Year Workmanship Warranty and 10 Year Product Warranty.

At Affordable Roof Coating, we follow a thorough and professional process to ensure your roof looks great and stays protected for years to come.

Stage 1: Inspection and repairs

We start by inspecting your roof for any cracks, rust, dents, and loose nails or tiles. Any damaged areas are repaired or replaced to create a solid foundation for the coating.

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

Tile roofs
All tiles will be checked for cracks and replaced where required. Ridges and barges will be checked and where required will be replaced and repointed with the ARC Flexible Pointing System. Valleys will be checked, repaired, or replaced as required.

Decramastic roofs
Any dents in chip-coated tiles will be popped out where possible. Tiles will be replaced where they cannot be repaired. Ridges, flashings, and valleys will be checked and repaired or replaced as required.

Stage 2: Clean

Your roof is thoroughly cleaned with a high-pressure washer to remove dirt, moss, lichen, and any old or flaking paint. This is essential for proper paint adhesion and a clean, smooth finish.

Stage 3: Protective masking

We protect your gutters, windows, walls, and surrounding areas from overspray using drop sheets and masking. Your property is treated with care and respect.

Stage 4: Optional anti-fungal treatment

If required, we apply a roof-safe fungicidal wash to eliminate any remaining spores or organic growth. This step ensures a longer-lasting finish.

Stage 5: Roof priming (if required)

Metal roofs
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.

Tile roofs
Tile roofs will be sealed with ARC’s Waterproof Membrane Sealant System for the areas that need more protection.

Decramastic roofs
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.

Stage 6: Coat

Once the roof is clean and appropriately treated, we apply two coats of a high-performance, flexible roof paint or membrane paint using airless spray equipment. This gives your roof a fresh, modern look and long-term weather protection.

This step completely seals the roof with a waterproof membrane to protect it for many years to come. Our Product Warranty is 10 years, however, we expect the coating to last well beyond this period.

Stage 7: Final clean and inspection

Once the job is done, we clean up the worksite, remove all masking, and do a full quality check to ensure your roof looks amazing and meets our high standards.

This step completely seals the roof with a waterproof membrane to protect it for many years to come. Our Product Warranty is 10 years, however, we expect the coating to last well beyond this period.

About ARC Liquid Membrane Roof Coat

ARC Liquid Membrane Roof Coat protects and revitalises 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, ARC Liquid Membrane Roof Coat provides superior UV resistance to protect roofs from NZ’s uniquely harsh ultraviolet levels.

10 Year Product Warranty
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 and a 10-year product 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.