Waterproofing to be installed by an, One layer Derbigum SP4 waterproofing membrane, with 75mm side laps and 100mm end laps, sealed to primed surface to falls and crossfalls by 'torch-fusion' finished withone coat of acrylic primer followed by two coats acrylic paint. (Sketch 1), Turn-ups greater than 200mm high should be treated as turn-up and capping. Insulation – the stone layer reduces diurnal temperature fluctuations. Waterproofing Contractors must be advised by the paint manufacturer about the application procedure and suitability as regards adhesion to the flexible Derbigum waterproofing membrane. The number and size of outlets to be determined by the design team. Inverted beams should be capped in Derbigum similar to any kerb. Acrylic waterproofing system to parapet dressed down over counter flashed Derbigum turn-up. Design and detail together with proper preparation of the substrate are key elements to successful roofing. Inverted Beams Allow sufficient height for maintenance purposes (600mm). (Sketch 2), It is good waterproofing practice that all exposed terminations on vertical surfaces are either flashed or counterflashed. The nature of vertical surface and aesthetic requirements will determine the flashing type. Where this is unavoidable, the opening is to be sufficiently large as to enable proper dressing of the membrane. All angles, internal and external, should be rounded. Derbigum provides a flanged water outlet that is sandwiched between two layers of Derbigum thus forming an integral part of the system ensures complete drainage and is simple in its installation. Plinths The waterproofing is to be fully dressed into the drainage outlets so as to ensure a watertight seal. Derbigum is sealed by 'torch-on' fusion over the cove and to the vertical surface to a minimum height of 100mm. A sand/cement cove with a 35mm radius is to be formed at all internal angles. Sharp edges and angles are to be avoided. It provides a firm and even surface to which the Waterproofing membrane can be properly sealed. One layer Derbigum SP4 waterproofing membrane, with 75mm side laps and 100mm end laps, sealed to primed surface to falls and crossfalls by 'torch-fusion' finished with two coats bituminous aluminum paint. Plinths or bases built on the waterproofing membrane are to be placed on an additional layer of SP4 and not directly to the waterproofing membrane. Kendi Pinlerinizi keşfedin ve Pinterest'e kaydedin! This is in contrast with a pitched roofwhich slopes. This section refers to general low-slope (less than 5º pitch) concrete roofs screeded to falls and crossfalls to outlets where the roofing membrane is exposed to the elements and temperature fluctuations. A variety of flashing methods and systems are available. The surface to receive the Derbigum is to be fully primed with a bitumen primer. However, whilst they are described as ‘flat’ almost all flat roofs are actually laid to a fall to ensure that rainwater can run off to the lower side. Form release agents and concrete curing compounds must be compatible with the waterproofing materials being used or must be removed from the concrete surface by the responsible trade. a number of advantages: A stone-guard or band of larger stones should be positioned around the outlets so as to ensure that the smaller stone is not 'washed' down the outlets. The nature of vertical surface and aesthetic requirements will determine the flashing type. A flat roof is a roof that is completely, or almost level. Water should not be drained through an inverted beam. Ensure that double or multiple concrete supports are constructed to such a height to allow adequate access both for the Waterproofing Contractor at the time of installation and for cleaning and maintenance at some future date. Too often Waterproofing Contractors are compelled to install the waterproofing system on inadequate or poorly prepared surfaces. Typically they are designed to have a minimum fall of 1:40, which given on-site inaccuracies should result in a minimum fall of at least 1:80 in the finished construction. One layer Derbigum SP4 fully sealed (as described for roof areas), up and over plinths with a sheet metal capping detail over the plinths to serve as protection to the membrane. Deco House: A Masterful Renovation of a Period-Style Cottage Green Dream: A Fast, Affordable & Eco-Friendly Build for a Rental Inverted beams should be capped in Derbigum similar to any kerb. Allow solvents in the primer to flash off prior to application. The general principles involved are noted in the example sketches. Horizontal and vertical surfaces are usually of different materials and are subject to different heat transference rates and thus differential movement.  The waterproofing membrane is subject to unnecessary stresses and practical installation problems if it is sealed into or over a 90º angle. It is recommended that brick parapets be rendered and protected with one layer of Derbigum SP3 or SP4. Provide a min. The cove will greatly reduce these stresses and provide a neat finish. Generally all surfaces to receive Derbigum modified-bitumen membranes are to be primed with a bitumen primer. Priming Priming procedures for other systems, such as acrylics, self-adhesives, flashings etc. Generally all surfaces to receive Derbigum modified-bitumen membranes are to be primed with a bitumen primer. D 2.21 Waterproofing between layers of thermal insulation D 2.22 Flat roof with impermeable concrete slab and external insulation D 2.23 Flat roof with impermeable concrete … Parapets & Kerbs. Surfaces primed too far in advance which have gathered dirt and dust must be lightly re-primed prior to application of the membrane. It should be smooth, free of voids and protrusions, contaminants and undulations. Where this is unavoidable, the opening is to be sufficiently large as to enable proper dressing of the membrane. The screed around the outlet is preferably recessed to accommodate the additional membrane layer and assist in achieving complete and effective drainage. Concrete fins or other projections should be removed to … The substrate should be stable and inert. Coves and Rounded Edges It should be free of voids and protrusions, dry and clean, free of contaminants. This section refers to general low-slope (less than 5º pitch) concrete roofs screeded to falls and crossfalls to outlets where the roofing membrane is exposed to the elements and temperature fluctuations. Waterproofing to be installed by an, One layer Derbigum SP4 waterproofing membrane, with 75mm side laps and 100mm end laps, sealed to primed surface to falls and crossfalls by. A sand/cement screed is the most widely used and acceptable substrate. Allow solvents in the primer to flash off prior to application. Ensure that the level of the flange is kept below the screed level to prevent ponding around the outlet. Neuroarchitecture: The New Movement at the Forefront of Design Do You Know the Difference Between Restoration and Renovation? Honeycombs, tie-wire holes and other voids in the concrete substrate must be cut out and re-pointed with a non shrinking concrete patching compound. It is good waterproofing practice that all exposed terminations on vertical surfaces are either flashed or counterflashed. Ensure that double or multiple concrete supports are constructed to such a height to allow adequate access both for the Waterproofing Contractor at the time of installation and for cleaning and maintenance at some future date. Surfaces primed too far in advance which have gathered dirt and dust must be lightly re-primed prior to application of the membrane. A layer of light coloured stone chips laid loose over the Derbigum waterproofing provides should be formed in the substrate and not in the loading layer. Alternative     Falls to outlets etc. Foamed or expanded cement, polystyrene bead screeds etc. A counterflashing of fibre-reinforced bitumen, metal flashing or similar over the Derbigum turn-up is recommended.         of 35 mm radius rounded cove at all internal angles. Water should not be drained through an inverted beam. One layer Derbigum SP3 or SP4 waterproofing membrane, with 75mm side laps, sealed by 'torch-fusion' to side and top of parapet wall to receive paint (elsewhere). The inclusion of emergency overflow pipes is to be considered. Acts as ballast – in high wind areas and for loose laid systems especially over insulation boards. Alternatively, a flanged outlet pipe is to be inserted through the beam from the 'higher' side ensuring that the screed level on the 'lower' side is sufficiently below the base of the pipe as to be able to achieve a proper seal at that point. The waterproofing membrane, correctly selected, installed and properly maintained, is now considered as a permanent structural element with a life expectancy equal to that of the building it is protecting. Attention to detail is important. used to create falls and crossfalls are to receive a sand/cement topping and are to be properly cured and thoroughly dry prior to installation of the waterproofing membrane. Outlets are to be positioned so that they are easily accessible both for the Waterproofing Contractor at the time of installation and maintenance purposes at some future date. The Scottish Technical Handbook - Domestic, describes flat roofs as roofs, '...the slope of which does not ex… It is the most widely used protective coating, with the particular advantage of excellent solar reflective properties. A variety of flashing methods and systems are available. Alternatively, a flanged outlet pipe is to be inserted through the beam from the 'higher' side ensuring that the screed level on the 'lower' side is sufficiently below the base of the pipe as to be able to achieve a proper seal at that point. Provides an aesthetically attractive finish. 31.May.2017 - Bu Pin, dlamini thembinkosi tarafından keşfedildi. The top of the parapet is plastered with an inward slope and rounded edges. are referred to in each particular section and/or datasheet.

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