The main sources of exposure to formaldehyde in the home are furniture, which may contain formaldehyde in the glues, resins and board materials used in its manufacture, and urea formaldehyde foam products used in upholstery. Formaldehyde based resins are also used as a binding agent for mineral fibre based insulation products used for cavity wall and loft insulation and gap filling foams. HSE have published guidelines on work with urea formaldehyde. Formaldehyde vapour can be emitted for several years after installation. Additional exposure may come from formaldehyde-containing cosmetics and cleaning agents. Some carpets and soft furnishing textiles and wall coverings also contain formaldehyde based adhesives, finishes and preservatives which can also raise domestic exposure levels.