Our repair and maintenance processes for concrete chimneys include the following: Concrete repairs using resin or cement based materials Concrete windshield strengthening repairs. Installation of monitoring equipment. Surface preparation and coating systems. Design, installation and maintenance of access ladders, walkways, gantries and ancillary steelwork. Installation and maintenance of aircraft warning lights. Repair and renewal of refractory and other specialist linings. Design, installation and maintenance ofgas efflux velocity cones. Demolition and reconstruction. High-pressure water cleaning. Repair, refurbishment, upgrading,installation and testing of lightning protection systems to BS6651. Installation, maintenance, repair and testing of fall arrest systems.