WELDING TECHNIQUESHot air welding is the method used to securely join the laps of single ply membranes. There are principally two types of welding equipment, hand held and automatic machines; both require an electrical supply to the roof which is fed through a residual circuit breaker and is normally obtained direct from the mains supply or by generator where appropriate. The membranes will fuse together at temperatures between 380 - 500°C to provide homogenous joining as they cool.Thermofol PVC membrane can also be solvent welded. The solvent is wiped between the two pieces of membrane and chemically reacts to fuse the joint.HAND HELD EQUIPMENTThis is used at all detailing on the roof for both Bauder FPO and PVC membranes as it allows for flexibility of positioning. It is not appropriate for the span of a large roof due to the slow application time. The equipment requires 110v power supply.Most hand-held equipment incorporates PID technology to give a continuously monitored temperature of between 390 - 500°C at the welding point. depending on membrane typeAUTOMATIC EQUIPMENTThese machines are larger and are used over the large span of the roof to deliver a homogenous join of the membranes. They incorporate a heavy roller which follows the welding point and applies pressure to the lapped membranes to ensure a secure weld. The machine requires a 240v power supply and is able to weld an average of 2.5 metres of lap join a minute.The machine automatically controls the temperature at the welding point, keeping it constant. The installation of Bauder Thermoplan FPO always requires automatic equipment on larger areas.847 bauder.co.ukINSTALLATION TECHNOLOGYINSTALLATION TECHNOLOGYThere are three principle options for attachment of single ply membranes, mechanical fastening, adhesive bonding and ballasting.The installation methods are suitable on new build or refurbishment projects; with consideration of the attachment method and additional loading to an existing structure discussed with your Area Technical Manager at an early design stage to ensure a satisfactory specification.MECHANICALLY FASTENED The mechanically fastened system allows the membrane to be fixed accurately and quickly; it is ideally suited for metal and timber deck constructions, though it can also be used on concrete decking. It has outstanding performance where there is a high risk of wind uplift and provides a secure, durable and economic installation. If tube washers are used with the mechanical fixings, the problem of cold bridging is avoided.The ability to unfasten the membrane also allows consideration to be given to recycling and life-cycle evaluation.ADHESIVE BONDINGThis method of membrane installation is ideally suited for very complex building shapes or where drilling and mechanical fastening is inappropriate, such as a concrete deck with a high proportion of stone or where the deck structure may be compromised by the drilling, or the visibility of the mechanical fixings is not desirable. The finished job is highly durable and avoids the problem of cold bridging.BalastThis option for membrane attachment restrains the components of both warm roof and inverted roof systems. A suitable aggregate or paving should be specified that will be sufficient to resist wind uplift and flotation. In this situation, the single ply membrane needs to be protected from abrasion by the use of a separating layer.Hand Held EquipmentCADSpecification SupportCAD DRAWINGSwww.bauder.co.uk/technical-centreNBS SPECIFICATIONSwww.bauder.co.uk/technical-centreTECHNICAL HELPLINET: +44 (0)1473 257671E: technical@bauder.co.ukPROJECTS PORTFOLIOE: marketing@bauder.co.ukW: www.bauder.co.uk/media-centreSINGLE PLYSYSTEMS

THERMOPLAN-T FPO bauder.ie48BRITISH AND EUROPEAN STANDARDSThermoplan-T has been tested by the BBA and carries certificate number 04/4120 and has been approved by Factory Mutual.FIRE RATINGTo provide high levels of fire resistance, our formulation includes a high performance halogen-free fire retardant giving an EXT.F.AB rating awarded to satisfy the requirements of Part B of the Building Regulations. Tested to BS 476 Part 3 External Fire Exposure to Roofs as covered by European Standard DD ENV 1187:2002.TECHNICAL CREDENTIALS