Commercial Roofing in Thornlie
Professional commercial roofing services for Thornlie homes and businesses. Licensed, insured, and backed by Dulux 15-year manufacturer warranty on materials. Suitable for metal roofs and tiled roofs and flat roofs across Thornlie.
65+ completed roofing jobs on record in Thornlie

Licensed & Insured
Dulux Accredited
5 Stars
Free Quotes
Why Choose Us for Commercial Roofing in Thornlie?
Small shops and warehouses scattered through Thornlie face the same challenges as the residential stock, 40-year-old buildings with aging roof systems. Whether it's a corroded Colorbond top or cracked concrete tiles over a converted space, we handle commercial roof maintenance and restoration. The heat on the southeastern corridor (38-42°C in summer) is harder on commercial buildings because they're often uninsulated underneath, putting extra stress on the roof itself. We work on commercial properties across Thornlie, from straightforward cleaning and repairs to full restoration. Most jobs are quicker than residential because commercial rooflines are simpler, but the same aging patterns apply. We've got flexible scheduling for businesses and can often work outside hours to keep things running.
Commercial buildings scattered through Thornlie corner shops, small offices, light workshops often use the same metal or concrete tile systems as homes but with larger, flatter roof areas that collect debris from the surrounding mature canopy. Thermal expansion on unshaded north-facing sections combined with Thornlie's 38 to 42 degree summers puts extra stress on original metal flashings and seals. Many were built at the same time as the residential stock, so aging issues run parallel to the suburban houses around them.
Roof restoration in Thornlie for ageing homes established from the late 1950s through the 1980s, including repointing and tile renewal. Dulux Acratex accredited, 15 year warranty. Free quotes.
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 Thornlie experience
- Premium Materials - Dulux Acratex products with 15-year manufacturer warranty
- Quality Guarantee - 12-month workmanship warranty on repointing, rebedding, tile replacement and leak repairs
Local Thornlie Expertise
Thornlie is one of Perth's largest and most established southeastern suburbs - 17km from the CBD, first established as a housing estate in the late 1950s (the first homes were occupied in 1957) and built out through the 1960s, 1970s and 1980s with a population built around family homes on generous quarter-acre blocks. Nearly seven decades of settlement has produced a suburb with uniformly aging roof systems and impressively mature streetscapes: eucalyptus, peppermint, and jacaranda trees now 15-20m tall creating a suburban canopy that shades significant portions of roof surfaces across the suburb. The Canning River runs near Thornlie's southern boundary, and the suburb's flat to gently undulating terrain retains moisture longer than hillier areas. At Roof Restorers Perth, we've restored roofs across Thornlie, Forest Lakes, and the wider Maddington corridor with 15+ years of team experience, specialising in the mass-built 1960s-1980s housing stock that defines this suburb.
The result: Comprehensive restoration that brings Thornlie's 40-70 year old roof systems back to full performance - addressing decades of mortar deterioration, canopy moss, and thermal fatigue - backed by a 15-year Dulux manufacturer warranty on materials.
Recent Roof Work in Thornlie
A sample of real jobs from our records in Thornlie.
Full roof restoration
338 m² · Centurion · Charcoal · 2020
Roof repointing
326 m² · Centurion · Charcoal · 2022
Benefits of Commercial Roofing for Thornlie Properties
Insured for commercial sites
We carry $10M public liability and work safely at height on warehouses, factories, offices and strata blocks across the Perth metro. The certificate is there before we start.
Dulux Acratex Accredited - Roofing Specialist
That's Dulux's highest accreditation tier. It's what lets us coat and restore large commercial roofs to manufacturer spec, with the 15-year Dulux Acratex material warranty on the coating.
Restore and repair, not a full re-roof
Coating, repointing, flashing repairs, leak repairs and gutter work extend the life of a sound commercial roof for a fraction of replacement, and without stripping the building open.
Worked around your operations
We stage the work and can schedule out of hours so the roof gets done without shutting the warehouse, office or shopfront underneath it.
Our Commercial Roofing Process in Thornlie
- 1
Site assessment and access plan
We inspect the roof, identify what's failed, and plan safe access and staging for the site, including any work-at-height or traffic-management needs.
Why it matters: Commercial roofs are large and access drives both cost and safety.
- 2
Clean and prepare the surface
The roof is cleaned back to a sound surface and prepared for coating or repair, with debris cleared from gutters and valleys.
Why it matters: Coatings and seals only bond to a clean, sound substrate.
- 3
Repair failures and re-flash
We replace broken tiles, reseal or patch failed flashing, and fix the leak points before any coating goes on.
Why it matters: Coating over a live leak just hides it.
- 4
Coat, finish and sign off
Where the roof is being restored we apply the Dulux Acratex system to spec, then walk the completed scope with you before we leave.
Why it matters: A documented sign-off matters for commercial and strata records.
Commercial Roofing in Thornlie - FAQs
Do you provide commercial roofing in Thornlie? ▾
Yes. Roof Restorers Perth provides commercial roofing across Thornlie and nearby Sorrento, Applecross, Port Kennedy. Roof restoration in Thornlie for ageing homes established from the late 1950s through the 1980s, including repointing and tile renewal. Dulux Acratex accredited, 15 year warranty. Free quotes. Call 6388 4492 for a free, no-obligation quote.
Do you handle small commercial buildings in Thornlie, or just residential? ▾
We work on small commercial roofs in Thornlie, corner shops, offices, light industrial. Same problems as homes really, just bigger areas. We assess the whole building so nothing gets missed.
How much does it cost to restore a small commercial metal roof in Thornlie? ▾
Depends on size and condition, but small single-storey commercial roofs typically run 9,000 to 12,000 similar to homes. More if it's complex. We quote by inspection.
How much does commercial roofing cost? ▾
It depends on the roof's size, pitch, condition, access and how many sections need coating versus repair. Call 08 6388 4492 or request a quote for a fixed price. You get a documented scope and one fixed number before anything starts, which is what facilities managers and strata committees need for budgeting.
How long does a commercial roofing job take? ▾
It depends on the size of the roof, its condition, and how the work is staged around your operations. We give you a realistic timeframe with the quote, and where the job needs to run out of hours or in sections to keep the site trading, we plan that timing with you up front.
What commercial properties do you work on? ▾
Warehouses, factories, offices, retail and shopfronts, and strata-managed residential blocks across the Perth metro. Metal, tiled and flat roofs. We assess access and condition on site and price it before any work starts.
Can the work be done outside business hours? ▾
Yes. We can stage the job and work out of hours or in sections so trading, manufacturing or office work underneath isn't disrupted. We'll plan the timing with you up front.
Do you restore commercial roofs or only replace them? ▾
We restore. For a roof that's sound but weathered, cleaning, repairs, flashing resealing and a Dulux Acratex coating extend its life for far less than a re-roof. If a roof is genuinely past it, that's a separate roof replacement conversation.
Are you insured and can you provide documentation? ▾
Yes. We carry $10M public liability and can provide the certificate of currency, plus a documented scope and sign-off, which is what most commercial and strata managers need for their records.
Is there a warranty on commercial roof coating? ▾
A restored roof finished in the Dulux Acratex system carries the 15-year Dulux manufacturer warranty on the coating materials. On a tiled roof our 12-month workmanship guarantee also covers the repointing, rebedding, tile replacement and leak repairs within the job. Metal and flat commercial roofs are a clean-and-recoat job, so they carry the coating warranty but not the tiled-roof workmanship items. We'll set out exactly what's covered before you commit.
What Our Customers Say
"Very professional work by the team of roof restorers. I went with their roof restoration package, Jack did an amazing job. Ryan and Jack were professional, detail oriented, and did a great job throughout. The roof looks brand new now, and I'm very happy with the result. Highly recommend the team!"
"Guys did a great job, roof looks new again."
Get a Free Commercial Roofing Quote for Thornlie
Free quote • No obligation • Local Perth team