International Prestressed Hollowcore Association
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At the heart of the global prestressed hollowcore industry since 1969.

The International Prestressed Hollowcore Association is a truly diverse, global organisation. For 50 years, it has been instrumental in driving the industry forward.

Since its inception, IPHA has been integral in the design, development, production, marketing and sales of prestressed hollowcore as a building product.

Years of Hollowcore Experience

We Bring the Prestressed Hollowcore Industry Together

Promoting collaboration and the free exchange of knowledge.


IPHA is managed by an elected board of directors, and incorporates separate technical and marketing committees. The organisation’s objectives include; actively promoting prestressed hollowcore, best practice, and free exchange of information between members.


Our diverse list of members comprises prestressed hollowcore manufacturers from numerous countries around the globe. Associate members include machinery and equipment manufacturers, material and chemical suppliers, and software developers.


Prestressed hollowcore offers many advantages over alternative methods of flooring. An economical solution in a wide range of applications, hollowcore flooring enables flexibility in design, structural efficiency and swift erection of building projects.

News & Events

IPHA regularly holds a number of valuable events for its members, including an annual conference, plus dedicated technical and marketing seminars. Technical papers, articles and news from around the industry are all available via this website.

We Strengthen the Competitive Position of Our Members

Playing an active role in research and development.

IPHA is a family. Learning from one another, staying at the forefront of prestressed hollowcore technology.



What Our Proud Members Say…

IPHA is a result of the efforts of many busy people that have given, and continue to give, their time to the organisation. Through shared experiences, every member has the chance to benefit from others, and come away richer in their knowledge for it.

Tony Crane

Honorary Member, IPHA

IPHA has been a formative part of the hollowcore industry over the years. It has pre-empted potential problems within the market and helped its members to address them, increasing confidence in hollowcore as a construction product.

Steve Carr

Former Board Member/Associate Member, Tarmac/Spiroll

International co-operation in the industry is important. Markets, regulations and applications differ from one country to the next. IPHA has been a good forum to discuss solutions, design practices and other topics, allowing members to learn from each other and improve their businesses.

Olli Korander

Former Board Member, Consolis

IPHA’s Latest News & Events

IPHA Annual Conference 2023

IPHA Annual Conference 2023

The 27th Annual IPHA Conference, from May 11th to May 14th 20232, will be held in the historical city of Vilnius, capital of Lithuania.  Betonika, a company in the Consolis Group, will host the event.   Topic The theme of the conference is: HOLLOWCORE and...

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New IPHA Executive Director Appointed

New IPHA Executive Director Appointed

A message from IPHA Chairman, Seamus McKeague   Last week, IPHA held its first board meeting of 2023 in the Sheraton Hotel beside Brussels Airport, and we had a full attendance. The board unanimously approved the appointment of Kjell-Ole Gjestemoen (Keijo) as our...

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IPHA Seeking New Executive Director

IPHA Seeking New Executive Director

IPHA, the International Prestressed Hollowcore Association, was established 30 years ago. It is the foremost organization dedicated to all aspects of the design, development, production, sales and marketing of prestressed hollowcore floors and walls. IPHA is an...

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