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Coastwide Waterproofing —
Your Qualified Waterproofers

Fixed Prices

No Service Call


Reliable Service

Fully Licensed

New South Wales

High Quality


Comprehensive Waterproofing Solutions

Looking for a waterproofing contractor to do their part for a home or business build or renovation? You’ve come to the right place! At Coastwide Waterproofing, our licensed waterproofers provide internal and external waterproofing services for residential and commercial clients throughout the Central Coast and Northern Sydney, including Woy Woy, Killarney Vale, Terrigal, Hornsby and Narrabeen. Whether you need supply and installation or supply only, we have your waterproofing needs covered (and watertight!)—all at an affordable price.

Speak to our friendly team on (02) 4306 3524 for a free quote. Our trade warehouse, Coastwide Waterproofing Supplies, is open Monday to Friday in West Gosford.

A Company Van — Internal Waterproofing in Central Coast, NSW

Products & Supplies

Our trade warehouse, Coastwide Waterproofing Supplies, is home to a massive range of waterproofing and tiling materials from leading brands.

Internal Waterproofing

Using quality materials, we provide internal waterproofing for various wet areas, including bathrooms, ensuites, laundries and toilets.

External Waterproofing

Our external waterproofing services cover flat roofs, decks, balconies, retaining walls, external door openings and much more.

Swimming Pools & Water Features

We specialise in waterproofing swimming pools and water features using first-rate waterproofing products to ensure proper sealing.


Our team provides waterproofing for a wide range of strata and commercial properties—whether new or existing.

Our Brands