bauder.ie140SEDUM BLANKET ON WARM ROOF CONSTRUCTION GENERAL DETAILINGThe British and European standards and industry codes of practice for traditional flat roof waterproofing apply equally to all forms of green roof construction. For the landscaping element, the well respected and independent German FLL standards and the new UK code of best practice are the most widely recognised and have been fully adopted by Bauder.The minimum required upstand height is 150 mm. This must be observed at all times and taken from the finished landscape surface and not that of the waterproofing. Perimeter kerbs featuring mechanically fixed capping must also be treated as upstands and given a minimum height of 150 mm.The only exceptions to this are perimeter kerbs, where the waterproofing terminates in a traditional welted drip or a GRP trim or beneath door thresholds, where a lineal drainage channel is incorporated. Round washed pebbles, graded 20-40 mm, or other Bauder approved aggregate, should be used at all borders to a recommended width of 500 mm, to provide vegetation free edging around upstand abutments, roof lights, rainwater outlets and all other penetration points.To conform to current Health and Safety legislation, either a handrail or fall prevention system should be incorporated within the design. If a portable ladder is to be the main means of access then a wall mounted fixing point for securing the ladder must be included.Vegetation BariersVegetation barriers provide several important functions for extensive green roofs:n Protection of the vegetation layer from water running down vertical upstands.n Rapid drainage during and after heavy rainfall.n Ease removal of encroaching vegetation during routine maintenance.n Protection of the waterproofing from mechanical damage.n Provision of a fire break.n Resistance to wind uplift by increasing the imposed loading at roof perimeters.Salt Grammar SchoolBradford
Bauder SS40 drainage and edge trimBauder SS40 is a perforated stainless steel trim used to retain the sedum blanket at open perimeters with external gutters and is suitable for both bitumen and single ply installations. It is automatically used on specifications where the roof slope exceeds 5°. Bauder SS40 prevents substrate erosion at the exposed edges of the blanket and, due to the excellent wind uplift and fire characteristics of the Bauder sedum blanket, may be used where a pebble vegetation barrier is impractical. The trim should be set back from the drip edge by 150 mm to prevent vegetation overhanging the gutter and impeding drainage. Bauder AL80/100 drainage trimBauder AL80/100 is a perforated aluminium trim that retains pebble vegetation barriers at open perimeters. The product is suitable for use with both bitumen and single ply waterproofing systems.Bauder inspection chambersThese should be installed above all internal rainwater outlets to provide access for inspection and cleaning. The chamber lid is secured with a single quarter turn slot screw fixing and has finger holes for it's easy removal. The base of the unit is slotted on all four sides to ensure effective drainage, has feet on three sides to provide a stable base onto the waterproofing and has a cut-away feature on the fourth side to allow for its installation at abutments to kerbs and upstands where either chutes or two way outlets are installed.If required, the height of the chambers can be raised in 50mm increments by the use of extenders. Bauder inspection chambers are available as either a full size unit for internal outlets or a semi-circular alternative for outlets positioned close to abutment walls or kerbs. If required, the height of the chambers can be raised in 50 mm increments by use of height adapter rings. 141 bauder.co.uk? Bauder inspection chamber with surrounding pebble vegetation barrier? Bauder SS40 Drainage and Edge TrimSpecification SupportNBS SPECIFICATIONSwww.bauder.co.uk/technical-centreTECHNICAL HELPLINET: +44 (0)1473 257671E: email@example.comEXTENSIVETECHNICAL GUIDE500mm min.150mm min.