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What is the minimum drainage falls for a single ply flat roof?

The recommended minimum fall for a flat roof is 1:80 (0.72⁰). This applies whether the waterproofing is a polymeric single ply membrane, a reinforced bitumen membrane, or another type listed in BS 6229:2018, the code of practice for flat roofs with continuously supported flexible waterproof coverings. To achieve a 1:80 fall, the code of practice […]

Issue 9: ballasted or buried roofs

The following guidance should be followed when a flat roofing area is to be overlaid with a permanent system such as heavy-duty timber decking, paving, ballast, or bio-diverse (Green/Brown) systems. Any such roofing project must have an Electronic Leak Test carried out once the waterproofing is completed and before the finished surface materials are installed. […]

Issue 8: preparation of in-situ concrete decks

In-situ Concrete for roof decks shall be specified and produced in accordance with BS EN 206:2013 and installed in accordance with BS13670:2009 and the National Structural Concrete Specification. Normal Weight and Lightweight concretes are suitable substrates for most IKO Waterproofing system applications. As defined in BS EN 206:2013, Normal Weight and Lightweight concrete shall have […]

Issue 7: rippling in Spectraplan TPE membranes

Spectraplan TPE membranes can exhibit surface rippling, particularly with changes in temperature, the effect is also noticeable when the daylight changes from dispersed or diffused light of a cloudy day to direct sunlight. This is an inherent feature of the membrane as a result of in-built extensibility during the manufacturing process. The effect will normally […]

Issue 6: roof maintenance guidelines

All polymeric membranes 1.0 General Roof maintenance, as with any part of the building, is essential in order to comply with the waterproofing system guarantee and to ensure maximum performance and life expectancy. 2.0 Access Access to the roof must only be allowed under supervision of the Building Manager or the person responsible for building […]

Issue 5: guidance for working with IKO Polymeric systems in cold weather

Use of adhesives Generally both PU Adhesives and contact adhesives should not be used if the temperature is below 5° C, they should also be stored at 15+°C. Storing the adhesives on the roof overnight during low temperatures is considered poor practice and should be avoided. If this is unavoidable then provision should be made […]

Issue 3: methodology for repairs to IKO Armourplan

Areas to be worked on should be swept with a soft brush to remove any debris or sharp fines that may be laying on the surface. As well as the area to be repaired the surrounding area should also be swept to reduce the chance of bringing debris back into the work area. The membrane […]