Why do you tape hardibacker board at seams?

Taping the seams of Hardibacker board helps to create a continuous, stable surface that prevents cracks from forming in the finished tile or other surface materials. It also reinforces the joints, ensuring that they are water-resistant and less prone to moisture infiltration. Additionally, taping helps to create a smoother transition between boards, which is essential for a professional-looking installation. Properly taping seams is critical for maintaining the durability and longevity of the tiled surface.