Often, shiplap planks have a “V” groove, a gentle bevel along ... to control bathroom humidity. Avoid using MDF shiplap or tongue and groove boards in the bathroom, as MDF can swell or warp ...

It is made from a revolutionary form of MDF that combines MDI resins ... The classic V Joint profile with 100mm spacings and a 7mm groove is ideal for wall and ceiling linings in living rooms ...