Profile: L B Plastics Ltd. is a supplier of windows, doors, conservatories, curtain walling, walls, cellular products, decking, steps & verandahs, and ramps & access. Our PVC windows and doors can be provided with exceptional weather tightness and 'A' rated energy performance, using specialist glazing and construction methods. They can be central towards the achievement of a zero carbon home which requires a category 6 under the energy element in the Code for sustainable homes.