GRL provide a comprehensive ductwork, ventilation & thermal insulation service to both contractors and end users within the building services sector.


We offer a full supply and installation service, including the manufacture of specialised and none standard sections, in our Billingham workshop. Our in house teams of ductwork installers and sheet metal workers, are time served craftsmen with a wealth of knowledge and experience. Our fabrication facility ensures that we are not delayed when a project encounters those unforeseen special parts and sections that are needed to complete the work. With this facility we are able to offer a design, manufacture and install service for a wide range of boiler flues, together with associated brackets, supports, tanks and light fabrications. Our manufacturing team, hand craft ductwork to fill a niche market where mass produced ductwork is not suitable. This extends to the supply and installation of metal flat oval ductwork and plastic flat pack ductwork.

Our sheet metal fabrication service is the foundation for our Ventilation and extract systems. This naturally provides the specialist skills required, to manufacture and fit a protective outer cladding to the insulation, either with a metal or plastic finish.


Our ventilation services include the supply and/or installation of plant and equipment such as Air Handling Units, Heat Recovery Units, Dust Extraction Units, Cyclones, Fans, Grills and Louvers.

For dust extract we provide a range of filter systems and cyclones incorporating where required explosion relief panels.


The application of thermal insulation is by our time served Thermal Insulation Engineers who also have a wealth of knowledge and experience within this sector. This installation service is complimented by our insulation outer cladding facility. Here we offer metal, plastic and cloth finishes. For chilled water pipework we offer insulation incorporating a vapour seal to prevent condensation. Our thermal insulation engineers increase operational life of the installation by applying suitable protective layers under the insulation, to prevent corrosion of the various metals used for the pipework. Ever mindful of energy conservation, we are pleased to offer advice on the suitability of the full range of insulation materials.

The range of applications include:-

Pipework, ductwork, vessels, storage tanks and calorifiers.

The range of insulation materials include:-

Rockwool,  Phenolic Foam,  Calcium Silicate, Foamglas, Thermal Ceramics,  Armacel, System 2000,  Acoustic insulation, Rockwool mats, slabs and Fire Tube.

The range of finishes include:-

Plain Aluminium, Stucco Aluminium, Galvanised steel, Alu-Zinc, Stainless Steel,Rock Lap, Fibarol,  Isogenopak, Venture Clad, PIB Sheeting, Mastic & Scrim Cloth

We also measure & manufacture, removable valve & flange covers using silicon covered or foil covered glass cloth containing Rockwool LD Mat being secured with Velcro & draw strings.

When an installation is complete, it is the insulation cladding that is on show and this must suitably compliment the high standard of the design and installation of whatever system has been installed.