To ensure symmetry and proper alignment when installing cement boards as decorative cladding products, we recommend using aluminium profiles such as wall cladding starter strips. However, if you are using the boards as simple sheathing or tile backing, the use of a laser or spirit level and packers for any required joint gaps will be sufficient. If using CP in an external application such as a render carrier or sheathing behind cladding, consideration should be given to using a perforated closure trim which encourages airflow whilst preventing moisture build-up and insect attack within the system. For other building board products, simply navigate the useful links under the 'Other Boards' header which can be found under the plasterboard and drylining category on our site homepage.