About Us

Welcome to the Waterproofing Trades Association Singapore (WTAS), the leading trade organization for waterproofing professionals.

Know More About Us

As of 8 July 2008, the Waterproofing Trades Association Singapore (WTAS) was officially formed by a group of committed waterproofing trades Specialist Contractors and Suppliers/Manufacturers. Till date we have a total of 36 ordinary members, all of whom are Industry Professionals possessing vast years of expertise and experience in the waterproofing industries in Singapore (Refer to attached list of WTAS Ordinary Members and its Board of Directors).


Complete Works


Expert Members

Waterproofing Solutions
As the various regulatory bodies push the construction industry towards greater self-regulation, the WTAS would be an avenue and a platform in which the government, regulatory bodies and other associations can have dialogue, dissemination of information and feedback from our waterproofing trade industry on any planned implementation of regulations, legislations and developments that would affect our Construction Industry.

WTAS is to promote the prominence of our waterproofing trades and the importance of specialist expertise, quality consciousness, technical competency and professionalism. WTAS aspires to be a premier association that would actively participate in matters related to our waterproofing trade industry in Singapore.

WTAS will answer your queries and concerns pertaining to ALL waterproofing related matters and we value your precious feedback about the Association or the information provided in our web site.


To connect all Waterproofing Specialist Contractors, Main Contractors, Consultants, Architects, the Building Authority of Singapore and other related parties in the field of the Construction Industry in Singapore; for the purpose of feedback, consultation and to jointly address issues facing the waterproofing industry.

WTAS aspires to profile and promote the Association as a platform for collaboration and interchanging of ideas and knowledge among member companies.

WTAS will create awareness and a brand name for itself to serve as an important communication link for members to the international waterproofing network.


To be the ultimate Hub Centre for all waterproofing related services and technologies in Singapore.

President's Message

It is with great honour that I begin my term as the President of the WTAS. I would like to express my thanks to all members for your encouraging vote of confidence.
I will strive to bring the awareness of the Association to the Construction Industry of Singapore; to create a platform for collaboration and interchanging of views for all related waterproofing matters and its technologies.
To use my experience and network of members to bring the Association closer to BCA & other related Statutory Boards; to form an ultimate Hub Centre for Waterproofing Practices & Standards and Technical Competencies.
Also, in recognition that Education is the key to building a more professional industry, WTAS will focus its efforts in deepening its working partnership with the BCA Academy to develop training guidelines, skills upgrading programmes, field practices and publication of Waterproofing Standards & Guidebooks in relation to Materials and Installation.
I am excited about working with my new committee members to help with the challenging task of achieving greater heights for the Association. I view our collaboration as a team effort and would value all feedback about the Association or information provided in our web site.

Mr. Alfred Lim

President, WTAS

Our Accreditations

Board of Directors

The committee members that work tirelessly behind the scenes to make things happen.

Mr. Alfred Lim


Mr. Alex Lim


Mr. Peru N


Mr. William Chang


Mr. Elvin Tan

Technical Chairperson

Mr. Mike Ang

Training Chairperson

Mr. William Chua

Marketing Chairperson

Ms. Jean Tan

Membership Chairperson

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Blk 37, Jalan Rumah Tinggi #01-425 Singapore 150037

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Tel: 9858 8873
Fax: 6753 3208

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