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Top Marks Waterproofing Pty Ltd

Randwick, NSW·Waterproofing
At a glance
What stands out

Successfully resolved leak problems after other waterproofing contractors failed, according to multiple customers.

From 28 Google reviews
3 positive review signals

The business draws endorsements from remedial engineers and commercial builders who use them repeatedly, suggesting technical competence beyond typical residential work. Mark appears to invest significant time in explaining processes and warranties upfront, which customers appreciate for complex projects involving multiple balconies or full bathroom renovations.

Their work

Top Marks Waterproofing Pty Ltd waterproofing work in Randwick
Top Marks Waterproofing Pty Ltd waterproofing work in Randwick
Top Marks Waterproofing Pty Ltd waterproofing work in Randwick
Top Marks Waterproofing Pty Ltd waterproofing work in Randwick
Top Marks Waterproofing Pty Ltd waterproofing work in Randwick
Top Marks Waterproofing Pty Ltd waterproofing work in Randwick

What it's like working with them

Based on a sample of recent customer reviews (28 total)

What people love
Mark successfully fixes leaks where other contractors failed

desperate to fix my leak when two others had tried and failed

Detailed explanations of warranties and waterproofing processes

The quoting process and warranties were well explained to us

Reliable scheduling and timely completion across weather delays
Professional endorsements from engineers and building companies
Thorough trade coordination for complex multi-area projects

he managed all the trades very thoroughly

What they help with

Based on what their customers hired them for

Balcony WaterproofingBathroom WaterproofingRoof WaterproofingLeak RepairsSheet Membrane InstallationTorch-On WaterproofingLiquid Membrane SystemsCommercial WaterproofingRemedial WaterproofingBalcony Refurbishment

Credentials & background

Sourced from 3 public records so you don't have to look them up yourself

Professional endorsements from remedial engineers and building companiescustomer reviews
Successful repairs where other contractors failedcustomer reviews
Detailed warranty explanations and process transparencycustomer reviews

About Top Marks Waterproofing Pty Ltd

Mark leads this waterproofing business with expertise spanning balconies, bathrooms, and commercial projects across Randwick and surrounding areas. Reviews suggest he's particularly skilled at diagnosing complex leak issues where other contractors have failed, with one customer noting he successfully resolved a problem after two previous attempts by others. The business works with both residential renovations and commercial building projects, with endorsements from remedial engineers and building companies who use them repeatedly. Mark's approach involves detailed explanations of warranties and processes, thorough trade management for larger jobs, and maintaining clean work sites throughout multi-week projects.

Best for: complex leak repairs where other contractors have failed, multi-balcony waterproofing projects requiring trade coordination, and commercial waterproofing jobs requiring engineering-grade precision.

Location

Map showing Top Marks Waterproofing Pty Ltd location in Randwick
📍 Randwick, NSW 2031Open in Google Maps →
Full credentialstap to expand ↓
QBCC License
— Not confirmed
License Class
ABN
✓ 88491735085
GST Registered
Entity Type
Other
Operating Since

Often needed together

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Common questions about Top Marks Waterproofing Pty Ltd

What areas does Top Marks Waterproofing cover from their Randwick base?+

Reviews don't specify their exact service area beyond Randwick, though they handle both residential and commercial projects. Given their established relationships with building companies and engineers, they likely service broader Sydney areas. Contact them directly to confirm coverage for your specific location.

Does Mark handle complex leak problems other contractors can't solve?+

Two customers specifically mention Mark successfully resolving leak issues after other waterproofers failed. One reviewer was 'at my wits' end' after failed attempts by two previous contractors before Mark solved the problem. His diagnostic approach and technical knowledge appear well-suited for challenging waterproofing failures.

What do customers say about Top Marks' project management for larger jobs?+

For multi-area projects like the four-balcony job mentioned in reviews, customers praise Mark's thorough trade coordination and consistent communication throughout weather delays. He maintains clean work sites and sticks to agreed schedules, with one customer noting he 'turned up every time he said he would' during a complex renovation.

Do building professionals recommend Top Marks Waterproofing?+

Yes, reviews include endorsements from a remedial engineer praising their 'precision and dedication' and adherence to industry standards. SPH Built mentions using them consistently for 'several years', and another trade professional calls them 'absolute experts in sheet, torch-on and liquid membranes' for on-site work.

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ℹ️ Where this info comes from+
We pull from Google Places, the Australian Business Register, QBCC Licensed Contractors Register, and other public records to save you the legwork. Ranked by Google reviews, credentials, and profile completeness. How rankings work. Data last updated: 31 May 2026. Always verify credentials independently before hiring.