CBK Waterproofing
Chris and Brian are named by multiple customers as the reason they came back for a second job without shopping around.
The repeat-hire rate is notable: at least four reviewers went back for a second job or referred a family member's property without getting competing quotes, which says something about the trust they build on the first visit. That said, this is a small sample across nearly ten years, and the more recent half of reviews averages lower than the earlier half — there is one 1-star review describing an unresolved callback issue after a bathroom waterproof. That's a single isolated account, but given the small total review count, it's worth asking CBK directly about their warranty and callback process before signing anything.
Their work
What it's like working with them
Based on a sample of Google reviews (15 total)
“CBK have now done two jobs for us”
“waterproofing front and back balconies”
“repairing some cracked concrete and stairs”
What they help with
Based on what their customers hired them for
How they stack up
Context from 162 waterproofings in Northern Beaches
Credentials & background
Sourced from 4 public records so you don't have to look them up yourself
About CBK Waterproofing
Chris and Brian lead CBK's field work across a range of water intrusion problems — Chris is repeatedly named as the primary contact, estimator, and on-site technician who explains exactly what's going wrong before work starts, while Brian appears alongside him on larger, more complex jobs. The team covers a wide scope: basement and lower-level waterproofing (including crack repair and full floor sealing), balcony and deck waterproofing, torch-on membrane applications, rising damp treatment, bathroom waterproofing, concrete cancer remediation, and external drainage work. Across residential and strata/commercial properties — including multi-unit buildings in Northbridge and client-referred investment properties — they're comfortable with both emergency leak response and planned renovation work. What sets the crew apart in reviews is a combination of showing up when promised, explaining the scope clearly before touching anything, and leaving the site clean each day, even on multi-week jobs. They've been active for close to a decade and carry GST registration as a company, which matters when you're lodging insurance or strata claims. They're best suited to homeowners dealing with persistent or complex ingress issues — the kind that other trades can't pin down — rather than routine pre-purchase inspections or simple grout reseals.
Best for: persistent basement and lower-level water ingress that other trades haven't resolved, balcony and deck membrane replacement in residential and strata properties, and homeowners who want the job scope explained clearly before work begins.
Location
Often needed together
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Claim This Profile — Free →Common questions about CBK Waterproofing
What types of waterproofing does CBK handle?+
Reviews reference a broad scope: basement and lower-level water ingress, balcony and deck membranes (including torch-on), bathroom waterproofing, rising damp, concrete cancer repair, and external crack sealing. They've worked on both standalone homes and multi-unit strata buildings. The business name and category confirm waterproofing as the core trade rather than a sideline service. If your job falls outside these areas, it's worth checking with Chris directly at the quote stage.
Who actually turns up on site — Chris, or a subcontracted crew?+
Reviews consistently name Chris as the person who attends the initial quote and is present during work, with Brian named alongside him on larger jobs. Multiple customers mention both by name in the context of direct communication and on-site supervision. There's no mention in any review of anonymous or unfamiliar subcontractors turning up without Chris's involvement. For peace of mind, it's reasonable to confirm at booking who will be supervising the job.
What do customers say about CBK's pricing?+
Pricing feedback is positive but limited — one customer described the quote as 'competitive' and another mentioned 'very good price,' while a third said they didn't bother getting competing quotes because they trusted Chris's knowledge and expected his price to be fair. There's no mention of quotes that came in significantly higher than expected. With only 15 total reviews, there isn't enough data to say where they sit relative to Sydney market rates, so requesting an itemised quote and comparing it to one other tender is still sensible.
Do they work on strata or commercial buildings, or just houses?+
Yes — reviews include a concrete cancer repair across eight garages and a rooftop at a strata building in Northbridge, as well as waterproofing work referred through a building manager for a client's property. CBK is registered as a company and is GST-registered, which makes them suitable for strata invoicing and insurance or body corporate claims. Residential homes make up the majority of the reviews, but there's clear evidence of commercial and strata capability.
What should I ask CBK before hiring them for a leak repair?+
Given the small number of reviews available, it's worth asking two things directly: first, what their warranty or defect liability period covers and how callbacks are handled if the issue recurs after the job is complete. Second, ask Chris to walk you through the diagnosis before any work begins — reviews suggest this is standard practice for him, but confirming it sets expectations clearly. For basement or below-ground work, also ask whether they'll address both the internal and external faces of the problem, since several positive reviews highlight that dual-side treatment was what made the fix last.