Local ServiceMould Treatment in Hillarys
Professional mould treatment services for Hillarys homes and businesses. Licensed, insured, and backed by Dulux 15-year manufacturer warranty on materials. Suitable for tiled roofs and metal roofs across Hillarys.
3+ completed roofing jobs on record in Hillarys
3+ completed roofing jobs on record in Hillarys
Licensed & Insured
Dulux Accredited
5 Stars
Free Quotes
Why Choose Us for Mould Treatment in Hillarys?
Mould grows fast on south-facing roof sections in Hillarys due to the constant 65-72% humidity, especially in shaded areas under trees or where gutters stay damp. The salt spray from the ocean creates extra moisture in the air, and mould spores love that environment. Black or green discoloration on tiles is mould and algae, not just dirt, and it lifts tiles over time as the roots push up underneath. Biocide treatment kills the mould and algae, but it only works if the roof is properly cleaned first to remove the buildup. Once treated, annual cleaning or biannual salt rinses keep new growth from taking hold. The treatment sits underneath the coating system, so it lasts for years and doesn't wash off in the first summer rain.
Mould thrives in Hillarys' 65-72% humidity, especially under shaded tiles and in valleys. South-facing roof sections show black mould patches year-round. Treatment isn't a one-time fix; humidity brings it back in 2-3 years without ongoing maintenance. We apply biocide after cleaning to slow regrowth. The real answer is better attic ventilation and annual roof cleaning.
Roof restoration in Hillarys with marine-grade coatings for coastal homes. Dulux Acratex accredited, 15-year warranty. Call 08 6388 4492.
What's Included
- Free Satellite Quote - We measure and assess your roof from professional satellite imagery, no on-site inspection needed
- Fixed-Price Quote - No hidden costs, transparent pricing before work begins
- Professional Service - Licensed tradespeople with years of Hillarys experience
- Premium Materials - Dulux Acratex products with 15-year manufacturer warranty
- Quality Guarantee - 12-month workmanship warranty on all services
Local Hillarys Expertise
Recent Roof Work in Hillarys
A sample of real jobs from our records in Hillarys.
Roof repointing
211 m² · Centurion · Monument · 2025
Roof repointing
365 m² · Elebana · 2025
Benefits of Mould Treatment for Hillarys Properties
Kills it, not just hides it
We treat the moss, lichen, algae and fungus so it dies off at the root, then remove it, rather than just blasting the surface and leaving spores behind to grow straight back.
Protects the roof
Moss and lichen hold moisture against the tiles and work into the pointing. Treating it stops it lifting tiles and breaking down the roof from the surface.
Slows regrowth
A proper treatment leaves the roof clean for far longer than a plain wash, especially on the shaded, damp slopes where growth takes hold first.
Tile and metal roofs
We treat tiled and metal roofs alike, at the right pressure for the surface so the roof isn't damaged in the process.
Our Mould Treatment Process in Hillarys
- 1
Assess the growth
We check how heavy the moss, lichen and mould is and where it's worst, usually the shaded southern slopes, and quote a fixed price.
Why it matters: The treatment is matched to how established the growth is.
- 2
Apply treatment
A treatment is applied to kill the moss, lichen, algae and fungus at the root across the affected roof.
Why it matters: Killing it first means it lifts cleanly and doesn't regrow from leftover spores.
- 3
Remove and rinse
The dead growth is cleared off and the roof rinsed down at a pressure suited to the surface.
Why it matters: Clearing the dead material leaves the roof clean and the tiles visible.
- 4
Check the roof
With the roof clean, we point out any cracked tiles, failed pointing or other wear the growth was hiding.
Why it matters: Moss often hides the faults underneath it.
Mould Treatment in Hillarys - FAQs
Do you provide mould treatment in Hillarys? ▾
Yes. Roof Restorers Perth provides mould treatment across Hillarys and nearby Fremantle, Kelmscott, Lesmurdie. Roof restoration in Hillarys with marine-grade coatings for coastal homes. Dulux Acratex accredited, 15-year warranty. Call 08 6388 4492. Call 6388 4492 for a free, no-obligation quote.
Why is mould coming back on my roof so fast? ▾
Hillarys humidity runs 10-15% higher than inland suburbs. Once mould spores settle on damp tile, humidity keeps it alive year-round. Treatment slows it but doesn't stop it. Biannual cleaning and a whirlybird to move damp air out of your roof space helps more than treatment alone.
Can I treat mould myself or do I need a professional? ▾
DIY treatments don't work long-term. Commercial biocide needs specialist application to reach under tiles and in valleys where mould lives. Professional treatment costs $800-1,500 and lasts 2-3 years. After that, regular cleaning prevents costly regrowth.
How much does roof mould treatment cost in Perth? ▾
It depends on the roof size and how heavy the growth is. Call 08 6388 4492 or request a quote for a fixed price. If you're treating ahead of a paint or restoration, we roll it into the overall job.
What's the difference between mould treatment and a roof clean? ▾
A clean blasts the surface. A treatment kills the moss, lichen and fungus at the root first so it dies off and is far slower to come back. For heavy organic growth, treatment lasts much longer than a wash alone.
Does the moss and mould come back? ▾
Not as fast after a proper treatment. It can return over time in shaded, damp spots, and a roof coating slows it further. A surface-only clean that leaves spores behind grows back within weeks.
Is it safe for my roof and garden? ▾
We treat at the right strength and pressure for the roof type so the surface isn't damaged, and we take care around gardens and downpipes when rinsing off.
Do I need treatment, cleaning, or a full restoration? ▾
Heavy organic growth needs treatment to kill it properly. If the roof's just dirty, a clean does it. If it's also faded with failed pointing, that's a restoration. We'll tell you which after a look.
What Our Customers Say
"The overall experience dealing with the Roof Restorers was excellent. Ryan was very flexible in coordinating the job and dealing with the unreliable weather. Jack was very professional and explained every step of the project and kept us informed on the progress. He was always on time and was articulate in cleaning the roof, repairing areas, including the ridge caps and then restoring the paintwork. We are happy with the final result. I'm very confident in recommending this company. 👍👍👍👍👍"
"Ryan and Jack have done an amazing job on restoring numerous roofs for us. They worked very hard to finish the job on time, with minimal clean up. We are very happy with the job and would highly recommend to anyone. Thank you"
Get a Free Mould Treatment Quote for Hillarys
Fast response • No obligation • Local Perth team
Get Free Quote 
Call: 6388 4492