Leister UNIROOF 300 Automatic Roof Welding Machine

The Leister UNIROOF 300 is a 3450 W automatic flat roof welding machine operating from 1 to 10 m/min across temperatures from 100 to 600 degrees C with Leister closed-loop temperature technology, digital display of welding parameters, a standard 40 mm nozzle for homogeneous weld seams, close-to-edge welding capability up to 100 mm at parapet corners, and a brushless drive motor – compatible with Bitumen, ECB, EPDM, EVA, FPO, PIB, PVC, TPE, TPO, and TPU roofing membranes for medium-sized flat roofs, parapets, and supplementary welding on large roof installations across residential and industrial construction.

Reliable Automatic Flat Roof Membrane Welding for Residential and Industrial Construction

The flat roofing sector across Oman and the GCC encompasses a broad range of project scales, operator experience levels, and membrane material specifications – from residential rooftop waterproofing on buildings of a few hundred square metres to large-area industrial roofing programmes that require both a primary high-output automatic welder for field runs and a supplementary machine for parapet corners, edge details, and confined access areas where the primary machine cannot reach or turn.

The UNIROOF 300 is positioned as the right machine for both of these scenarios. On medium-sized flat roofs up to approximately 500 square metres, it functions as the primary automatic welding machine – delivering automatic seam quality across the full roof area including parapet corners where its close-to-edge capability allows welding to within 100 mm of the parapet face. On larger roof projects, it serves as the supplementary machine that handles the perimeter, corner, and access-restricted areas that the primary welder cannot complete. And in both roles, Leister’s closed-loop technology and digital parameter display ensure that the welding conditions – temperature, speed, and air volume – are set correctly, held consistently, and visible to the operator throughout each weld run regardless of their level of automatic machine welding experience.

UNIROOF 300 Welding Performance and Flat Roof Application Features

• Closed-Loop Temperature Technology for Consistent Seam Quality: Leister’s closed-loop temperature control monitors and maintains the set air temperature throughout each weld run, compensating for changes in ambient temperature, wind conditions, and supply voltage variation that rooftop operating environments across Oman and the GCC produce – ensuring that the temperature delivered to the membrane overlap remains stable at the set value from the first metre to the last, regardless of the site conditions the machine encounters during the weld run.
• Digital Display of Speed, Air Volume, and Temperature: The three welding parameters that determine seam quality are displayed digitally throughout operation, giving the operator continuous visibility of the machine’s process state and enabling immediate verification that all three parameters are correctly set for the membrane material and ambient conditions of the specific roof installation – without requiring separate instruments or a second operator to monitor process status.
• Standard 40 mm Welding Nozzle for Homogeneous Seam Width: The standard nozzle produces a consistent 40 mm hot air contact width across the membrane overlap seam, delivering uniform pre-heating and fusion conditions across the full seam width on each weld run – producing the homogeneous seam geometry that watertight roofing membrane performance requires and that visual inspection of the completed seam confirms as an indicator of adequate fusion.
• Close-to-Edge Welding up to 100 mm at Parapet Corners: The UNIROOF 300 is designed to weld close to vertical parapet faces and into parapet corners – to within 100 mm of the wall face – enabling automatic seam welding to continue through the perimeter areas of the roof where the transition between the flat deck and the parapet upstand creates the corner geometry that standard automatic machines cannot approach closely enough to complete without reverting to manual welding.
• 3450 W Heating Power at Maximum Single-Phase 230V Capacity: The UNIROOF 300 operates at 3450 W – the maximum heating power achievable from a standard 230V single-phase supply. This means the machine is extracting the maximum thermal performance available from the electrical supply that a standard rooftop power connection provides, without requiring three-phase power infrastructure that residential and smaller commercial roof projects may not have available.
• Brushless Drive Motor for Long Service Life: The brushless drive motor eliminates the brush wear and replacement intervals of conventional brush drive motors – extending the operational service life of the drive system and reducing the maintenance interventions required to keep the drive motor performing correctly across the seasonal roofing programme cycles that roofing contractors in Oman and the GCC operate throughout the year.
• 17 kg Compact Weight for Rooftop Mobility: At 17 kg, the UNIROOF 300 is sufficiently compact and light for a single operator to carry and position on rooftops – including up access ladders and across roof surfaces where the path to the work area requires the machine to be lifted and manoeuvred by hand. This weight class also makes the UNIROOF 300 practical as a supplementary machine on large roof projects where it must be transported to different sections of the roof to weld corner and perimeter details that the primary machine cannot reach.
• Ten Roofing Membrane Material Compatibility Types: The UNIROOF 300 welds Bitumen, ECB, EPDM, EVA, FPO, PIB, PVC, TPE, TPO, and TPU roofing membranes – covering the complete range of thermoplastic flat roofing membrane materials specified in residential and industrial construction across Oman and the GCC, enabling a single machine to serve the full membrane specification range that a roofing contractor’s project portfolio encompasses without requiring material-specific equipment.
• Simple Operation for Operators at Any Experience Level: The straightforward interface, easy nozzle insertion into the overlap seam without specialist technique, and Leister closed-loop control that maintains process parameters automatically make the UNIROOF 300 operable by roofing professionals who have not previously used automatic membrane welding machines – reducing the training and competency development investment that roofing companies must make before extending automatic welding to additional team members.

Flat Roof Membrane Welding Applications for the Leister UNIROOF 300 in Oman and the GCC

• Residential Flat Roof Waterproofing Membrane Installation: Provides automatic hot air welding for thermoplastic roofing membranes on residential buildings across Oman and the GCC – where roof areas from small villa rooftops to medium-sized residential developments fall within the UNIROOF 300’s primary application range of up to approximately 500 square metres, and where the machine’s close-to-edge capability handles parapet corners that residential roof perimeters routinely present.
• Industrial and Commercial Roof Sealing as Supplementary Machine: Functions as the supplementary roof welding machine on large industrial and commercial flat roof projects – completing the parapet detail welds, corner seams, and confined access areas that the primary high-output automatic welder passes over during field run welding, ensuring the full roof waterproofing membrane installation is completed to automatic machine quality without reverting to manual welding at perimeter sections.
• TPO and PVC Membrane Overlap Seam Welding: Delivers automatic overlap seam welding on TPO and PVC thermoplastic roofing membranes across the speed and temperature parameters appropriate to each material – with the closed-loop temperature control maintaining the precise seam temperature that TPO and PVC fusion requires for watertight, long-term seam integrity under the thermal cycling and UV exposure conditions of Gulf region flat roofing environments.
• Modified Bitumen Membrane Welding on Sheet Metal Profiled Roofs: With the rib profile kit accessory (article number 155.414), the UNIROOF 300 welds modified bitumen and compatible membranes across profiled sheet metal roofing substrates – enabling automatic seam welding on the corrugated and trapezoidal sheet metal roofing systems that industrial and warehouse buildings across Oman and the GCC commonly employ.
• Parapet Upstand and Corner Detail Welding: The close-to-edge welding capability enables the UNIROOF 300 to complete parapet upstand seams and corner details automatically – the sections of a flat roof waterproofing installation where water ingress risk is highest and where the transition geometry between deck and vertical upstand most demands consistent, reliable seam quality that automatic machine welding is better positioned to deliver than manual techniques.

Leister UNIROOF 300 – Available Through iBuild, Authorised Leister Distributor in Oman

iBuild is an authorised Leister distributor in the Sultanate of Oman, providing roofing contractors, waterproofing specialists, and building construction teams with direct access to the UNIROOF 300 alongside the rib profile kit accessory for profiled sheet metal roofing applications and the full range of Leister roofing accessories. As a manufacturer-authorised technical partner, iBuild supports temperature and speed parameter guidance for specific membrane material types, accessory configuration, and lifecycle support to ensure the UNIROOF 300 delivers consistent automatic seam quality across the residential and industrial roofing projects it serves.

For roofing contractors and waterproofing specialists across Oman and the GCC requiring a reliable, compact, and straightforward automatic flat roof welding machine with closed-loop process control, digital parameter display, and the close-to-edge parapet capability that professional flat roofing installation demands – at an entry point that makes automatic welding achievable for contractors establishing or expanding their automatic machine welding capability – iBuild is the authorised local source for the Leister UNIROOF 300.