Waterproofing Specialists
Waterproofing Specialists
SJ Waterproofing are a team of Auckland-based waterproofing specialists with over 15 years’ experience protecting properties from the elements.
Our Services
Our Services
We identify your needs and provide a wide range of waterproofing solutions.

Why choose us?

Fully licensed

You can rely on us to deliver great workmanship with our fully licensed and trained installers.

High repeat business

90% of our jobs come from repeat customers because we respond quickly, treat each job with care, and only use the best materials for the job.

Deep understanding of the products

We understand which waterproofing product is right for each job and are an approved applicator for several suppliers. All our products are trusted to perform – having all received BRANZ appraisal.

A smooth and reliable experience

For the entire time working with us, you can expect a smooth and reliable experience. Before waterproofing, we always thoroughly check the substructure is correctly prepared. We can be trusted to arrive on-site on time, complete the job to spec with speed and accuracy, and meet your build schedule.

Cooperate with council and site managers

While on-site, we deliver full support to site managers. Once the job is complete, we pass all the necessary information to Council so that it can pass inspection. We also share how to best protect and maintain the products.

Efficient and thorough paperwork handling

For all new jobs, we will issue full product warranties for up to 20 years. We also provide the Council Producer Statement (PS3) and Record of Work (ROW).

Our Services

We specialise in new builds, especially external waterproofing.


Deck/Roof Membranes

Internal Waterproofing

CONTACT US TODAY ON 021 186 0009

The team at SJ Waterproofing look forward to hearing from you. Please complete the enquiry form below for a FREE no-obligation quote and advice.


Sean and his team are the best waterproofers we’ve worked with: excellent communication, always on time and provide top workmanship and service to our project. Unlike normal tradies, they are also good at paperwork, which makes our job way easier. In all aspects, SJ Waterproofing is strongly recommended!

Jerry Liu, Director

– Miro Homes Ltd

SJ Waterproofing has been working with us for many years. They have extensive knowledge of all internal/external waterproofing products. Always give good suggestions and comply with Council requirements. They always stick to the work schedule, taking care of the work. Always have high standards of workmanship.

Steven Lin

- Ideal Home Management Ltd

I have known Sean and his team at SJ Waterproofing Ltd for the past 5 years. If you are looking for a professional, prompt response to your waterproofing needs, then look no further. Sean delivers a fast, efficient waterproofing service for not only internal waterproofing, but below ground and roof membranes as well. The quality of their workmanship is outstanding and their attention to detail is very much appreciated. I cannot speak more highly of SJ Waterproofing, they deliver what they say and turn up on time every time.

Steven Rose

- Plane Consultancy Ltd and U&N Global Ltd


Approved Applicator For