It is always good practice to try and ensure that a roof drains as efficiently as possible and meets the industry recommendations for minimum falls. For green roofs this prevents the accumulation of airborne dirt and dust and the risk of ponding water affecting plant life.
To assist the designer in the provision of a suitable gravity drainage system and in accordance with BS EN 12056 – 3: 2000 ‘Gravity drainage Systems’ inside buildings. Part 3 Roof drainage, layout and calculation and the Building Regulations Approved document Part H, Sika offers a drainage calculation service based on our standard rainwater outlet range.
This has been tested to BS EN 1253 : 2000, to enable the accurate provision of these calculations. Complimenting this service is a comprehensive range of roof drains, scuppers and couplings. Guidance can be given on siphonic drainage.