Building construction; repair; installation services; building insulation services; building cladding, covering, facing, flooring, lining, moulding, panelling, roofing, surfacing and tiling services; installation, maintenance and repair of apparatus for firing, baking, cooking, drying, heating, lighting and ventilating; installation, maintenance and repair of burners, dryers, furnaces, hearths, heaters, kilns, ovens, stoves; installation, maintenance and repair of materials delivery, insertion and extraction apparatus and systems for burners, dryers, furnaces, hearths, heaters, kilns, ovens, stoves; installation, maintenance and repair of apparatus for the manufacture, recycling and transformation of glass, and vitreous and silica based materials; installation, maintenance and repair of kiln furniture