JoistZ is an Engineered Joist specialist company, specialising in design and supply of high quality joists for floors and roofs. Our staff are highly trained and passionate about providing a modern, sustainable, efficient and cost effective option for your extension, new build, apartment or housing site. We can carry out various projects and past clients include, large Main Contractors, smaller Residential Customers, Social Housing Projects, School Schemes as well as Private Developers with many being repeat customers.