Construction & remedial
Certified waterproofing across new build and remedial scopes, from balconies to basements.
Certified waterproofing
Watertight
Certified
Protected
Sydney First Waterproofing delivers certified, high-performance membrane systems across construction and remedial projects — balconies, wet areas, roofs, planter boxes, basements, lift pits and retaining walls. We protect structures from water ingress and ensure long-term durability.
Certified Waterproofing
for Construction &
Remedial Projects
Balconies, podium decks and slab edges
Wet areas, bathrooms and internal membranes
Roofs, planter boxes and exposed membranes
Basements, lift pits and retaining walls
NCC & AS Compliant
Licence No. 456493C
Photographic QA
Sydney, Wollongong & NSW
$20M Public Liability
Compliant systems
Liquid, sheet and cementitious membranes installed to the NCC and Australian Standards.
Flood tested & documented
Moisture checks, flood testing and photographic QA with warranty certification on completion.
Trusted trade partner
Working alongside builders, strata, architects and remedial contractors across NSW.
Request A Quote
Send Sydney First Waterproofing your project details, or contact us directly if you want to talk through the scope first.
Let's protect your project from water ingress
Send us your drawings, photos or scope, the suburb, and the best contact number. Our team can review the details and discuss the next step.
Good for balconies, wet areas, roofs, planter boxes, basements, lift pits and retaining walls.
New construction and remedial works for builders, strata, architects and remedial contractors.
Prefer direct contact? Use the call, WhatsApp, or email options below.
Send your quote request
Give Sydney First Waterproofing enough detail to understand the scope and the best way to contact you.
Waterproofing Services
Sydney First Waterproofing provides compliant membrane systems across construction and remedial projects — the right system selected for each substrate, exposure and traffic condition.
Balcony, roof & podium waterproofing
Trafficable decks, exposed areas and planter interfaces — heavy-duty membranes with protective wearing courses for podiums and decks.
Wet area waterproofing
Bathrooms, laundries, kitchens and internal wet areas — liquid membrane application, moisture checks and flood testing to AS 3740.
Below-ground & tanking
Basements, lift pits, retaining walls and subsoil areas — torch-on bitumen, water stops and blind-side or positive-side tanking.
Liquid & sheet membranes
Polyurethane, polyurea, acrylic and cementitious systems, plus torch-on, self-adhesive, HDPE and PVC sheet membranes.
Leak investigation & remedial
Diagnostic testing, defect rectification and remedial waterproofing integrated correctly with concrete repair and facade trades.
Joint detailing & flood testing
Bandages, fillets, puddle flanges and termination seals, with flood testing and QA to confirm a watertight result.
Recent Waterproofing Work
Real membrane installations from Sydney First Waterproofing across balconies, wet areas, roofs, below-ground and remedial projects.
How Sydney First Waterproofing Works
A clear, documented process: assess the scope, install the right system to standard, then flood test and hand over full QA records.
1
Review scope & substrate
Assess the drawings, substrate, exposure and traffic conditions to select the correct compliant membrane system for the job.
2
Install to standard
Apply liquid, sheet or cementitious membranes by qualified applicators, with correct detailing at every junction and penetration.
3
Flood test & document
Moisture checks, flood testing and photographic QA, with checklists and warranty certification provided on completion.
Recent Project Videos
Real waterproofing work from Sydney First Waterproofing — balconies, wet areas, lift pits and flood testing.
New project videos will appear here as more Sydney First Waterproofing work is completed and published.
What Clients Ask Most
A quick overview of the waterproofing work Sydney First Waterproofing is commonly asked to carry out across NSW.
What does Sydney First Waterproofing handle?
Balconies, podium decks, wet areas, roofs, planter boxes, basements, lift pits, retaining walls, water stops, setdowns and subsoils — across both new construction and remedial scopes.
Are the systems compliant?
Yes. All works are designed and installed to the NCC, Australian Standards (AS 3740, AS 4654, AS 4858, AS/NZS 3500) and manufacturers' specifications, with QA and warranty certification on completion.
Do you work with remedial builders?
Yes. We operate as a trusted trade partner to remedial building companies, coordinating with structural, concrete repair and facade trades so waterproofing integrates correctly at every interface.
Are you licensed and insured?
Fully licensed with NSW Fair Trading (Licence No. 456493C) and carrying $20M public liability insurance, with an uncompromising commitment to safety, compliance and clear communication.
Want to see more of Sydney First Waterproofing's work?
Browse recent project videos to see examples of balcony membranes, wet area waterproofing, lift pit tanking and flood testing.
We Protect Structures
From Water Ingress.
Mahmoud Shamseddine
Director
57A Bent St
Chester Hill NSW 2162
Chester Hill NSW 2162
Balcony & podium waterproofing
Wet area membranes
Below-ground tanking
Follow Sydney First Waterproofing Online
See more balcony, wet area, roof and below-ground waterproofing videos across our social channels.