Rigtech Steel Structures PMB Ceilings supplied Summit XPS 40mm boards to Rig-Tech Steel Structures in Howick for a poultry shed.As seen in the photos below, summit Xps boards can be installed over purlin, below roof sheets. Contact us for the installation guidelines and specs.#roofing #kznbuilding #pmbceilings #midlands #insulation #ceilings #pietermaritzburg #summitxps #isoboard House Lang – Curries Post Summit XPS boards wrapped in blue ready to be installed over purlin.