Useful construction sites: Insulation Board Draft Proof Noggin Kingspan Celotex Lafarge Simpson Strong TieConstruction Industry Associations in the UK: CITB Construction Industry Training Board. HBF The House Builders Federation is a trade organization for housebuilders in the private sector. The Institute of Roofing works to promote high standards in roofing and raise skills in the UK. Precast Concrete Paving and Kerb Association Information on concrete block paving, covering materials, flags and kerbs. The Concrete Centre is the cement and concrete industry central organization in the UK.