Expamet Hy-Rib, some call hi rib or hy rib lath, is an expanded metal sheet product, specifically developed for use as permanent formwork to concrete. The profile of the open mesh, in combination with the Hy-Rib tangs, allow the development of dense concrete nodules and indents on the face of the Hy-Rib, forming an enhanced mechanical key for the second phase pour. In the case of visible elements, the resulting Hy-Rib surface is suitable to receive a rendered or tiled finish.

Hy-Rib is primarily used in construction joint applications but it is also used to form wall, beam & column surfaces and slabs soffits, where the formed surface will not be seen.

For over 80 years Hy-Rib has been successfully used as permanent formwork on innumerable building & infrastructure projects, throughout the world.