SPECIALISTS IN COMPLICATED DESIGN & MANUFACTURE5 Day delivery nationwide UK.Our technical staff have been selected to enable Minera Roof Trusses to specialise in complex roofs of all types standard or Attic (room in roof RIR) to any size and the machinery has been set-up to maximum efficiency and accuracy.And with being ISO accredited Quality Assurance and a member of the TRA - Trussed Rafter Association and with 30 years specialist in roof truss design, we are here to help.