TESTING AND INSPECTIONS As part of their own quality control procedures, the installing Bauder Approved Contractor will mechanically test the membrane as it is installed to ensure that the membrane is at least 6mm thick beneath the protection sheet. Additionally, our site technicians will randomly inspect the work during installation. To meet the criteria of the Bauder System Guarantee, we will carry out the final inspection with the Approved Contractor in attendance to ensure the integrity of the finished roof and that it meets the required standards of installation. Any issues identified will be reported to the Bauder Approved Contractor for immediate rectification. Any remedial work will then be re- tested. As the Bauder Bakor 790- 11 monolithic membrane system is described as a ' Protected Roof Membrane' it should always be covered by some form of build up. This will generally entail following trades accessing the roof and using it as a platform to install the additional finish. Bauder recommends that integrity testing be carried out and the results notified to the client and Bauder prior to any other trades works starting. There are a variety of testing options available: Leak Testing Immediately prior to installing any landscaping, the integrity of the waterproofing system must be independently checked for leaks. The method of testing should be agreed with the client's representative. Electronic Test This method is considered the quickest and most accurate method of testing, as this accurately locates very small penetrations on main deck areas. Independent certification is a warranty requirement and a copy of this test certificate must be submitted to Bauder Ltd prior to the issue of the Guarantee. Additional Localised Testing It has been known that the electronic method can be inaccurate when conducted in close proximity to metal objects, such as outlets, & metal upstands. In these cases a localised flood test against the areas/ details to be checked is more accurate and may be done in conjunction with the electronic test method. Once all additional trades have completed their works, it may be necessary to re- test any affected areas and remedial repairs made. EQUIPMENT The Bakor 790- 11 material must first be heated to the correct temperature until it is molten, during which time it is constantly mixed to ensure its full physical properties develop. The rubber content of the membrane, which is integral to this form of waterproofing material, makes it necessary to use indirect heat, as achieved by using a double- jacketed hot melt mixing machine ( unlike a standard single- shell asphalt mixer). The outer jacket holds a heat transfer oil that when heated by one or two propane burners, gently warms the Bauder Bakor 790- 11 compound in the inner jacket. This type of mixer ensures uniform heating of the material. Air jacketed machines are also a popular alternative, which can offer additional benefits of economy and versatility. A mechanical sweep agitator within the machine keeps the melted compound stirred. This is usually at the bottom of the inner shell and takes the form of a reciprocating blade, driven via external cranks and powered by a small engine mounted on the machines chassis. The oil- jacketed melting machine is typically equipped with two temperature gauges, so that the mixer operator can continually monitor both the temperature of the heat transfer oil and the 790- 11 compound. The safe operating temperature ranges from 162° C to 215° C ( 320° F to 419° F) with the most common operating temperature range from 180° C to 200° C ( 356° F to 392° F). ACCESS AND PROTECTION LAYERS For all applications, whether it is roofing or tanking, the membrane requires an access/ protection layer bedded into it to protect it from trafficking and likely damage from following trades. The protection layer also allows for access for the safe installation of the landscape finish. The type of protection layer will depend on the proposed build- up and the expected period of time that the system is going to be exposed to following trades. Bauder AP1 This is a 2.2 mm reinforced modified bitumen membrane for use on horizontal and vertical surfaces to provide access and solar protection. Bauder AP2 A 4 mm reinforced modified mineral surfaced bitumen membrane root barrier for horizontal and vertical surfaces, and solar protection to exposed areas. Bauder AP3 This is a rigid 3 mm polymeric composite board for horizontal and vertical surfaces. It is used for heavy landscaping, tarmac and areas requiring substantial protection. 79 bauder. co. uk Image courtesy of IRT Surveys TECHNICAL GUIDE

GENERAL DETAILING 80 bauder. ie TYPICAL PARAPET Many types of parapet upstand can be formed using the 790- 11 Bauder Hot Melt Waterproofing system. This example of an un- insulated upstand has the exposed areas of waterproofing protected from solar degradation by the Bauder AP2 protection sheet. The flat areas of waterproofing will be protected from solar degradation by the inverted insulation and or ballast and can therefore be installed with an AP1 protection sheet. As can be seen in this example it is most common practice for the detailing waterproofing to be installed prior to the main roof areas. SOIL VENT PIPE With a pipe penetration as shown in this detail a lead slate should be installed with a base flange that can be suitably primed to receive the 790- 11 Bauder Hot Melt Waterproofing system. The joint between the lead slate and concrete deck structure must be reinforced using an un- cured neoprene flashing. The lead slate must be tall enough to ensure a 150 mm height above the finished roof surface. It is good practise to ensure that the top of the pipe is finished with either a cowl or cap to close off the pipe and protect the waterproofing. EXPANSION JOINT DETAIL A simple but effective way of creating an expansion joint within the material is to utilize the un- cured neoprene flashing sheet and a foam rod or tube. This method of detailing allows the creation of the expansion joint without major disruption to the flow of water to the drainage points. However – the design and required performance of any type of expansion joint should be discussed at the design stage of the project to ensure that the specification of the join movement can be achieved with this method of detailing. Other expansion joint details are available for use with the 790- 11 Bauder Hot Melt Waterproofing system.