Building completion businesses carry out the finishing work that makes a new or refurbished building ready for use. Their work may follow structural construction or form part of a renovation, extension or fit-out. Depending on the project, services can include plastering and rendering, installing internal doors and joinery, fitting kitchens and bathrooms, laying flooring, tiling, decorating and fitting fixtures and fittings. Some contractors coordinate several finishing trades, while others specialise in one type of work. They may also complete external details, such as fitting windows, applying finishes or making good around new work. Before a project is handed over, building completion work can include checking finishes, correcting defects and attending to snagging items. The precise services offered vary, so customers generally agree the scope of work, materials and responsibilities with the contractor before work begins.