A principal inspection comprises a close examination of all accessible areas of a structure. The main purpose of such inspections is to provide detailed information on the physical condition of a structure as described within DMRB CS 450. Principal inspections require suitable means of access to ensure that all elements inspected are within touching distance.

Empirical offer experienced inspection engineers to assist clients with their inspection regimes. Empirical offer a full-service using approved suppliers to ensure that principal inspections are undertaken in a timely manner and in accordance with the requirements. This service therefore reduces the clients need to arrange and manage multiple sub-contractors.