12 Gutter systems utilising Siphonic Drainage


Siphonic outlets fitted to gutter systems, which also require to be lined, are integrated into the Unifold® installation using a Siphonic outlet gutter unit which is a fabricated section of Unifold® specifically designed to seal Unifold® to the siphonic outlet.


Siphonic Drainage systems are very maintenance sensitive. They must be kept clean in order to operate efficiently.


Problems with these systems usually emanate from the following conditions: -


1) Poor Roof and Gutter maintenance


Quite often siphonic systems are not maintained and as a result the leaf guards and strainers become clogged with debris and in these conditions the siphonic outlets can easily cease to operate.


2) Under-capacity or poorly maintained below Ground Drainage


The main flow of water from siphonic drainage needs to be un-interrupted in any way as disturbances to flow rate within below ground pipes will slow the main volume of water and affect roof drainage to the extent where the performance of siphonic outlets could be impaired.


These disturbances could be collapsed or debris filled drains or other pipes entering the drains too close to the siphonic connection.


3) Siphonic Drainage Design


It is quite possible for an early siphonic system to be under-designed, particularly as the changes to our weather systems in recent years has brought different rainfall patterns and increases in rainfall intensity. Such a system could become overwhelmed in the severe storm conditions of today.


Unifold® is able to help solve these problems in the following ways: -


1.To introduce "Snorkel" overflows into the system as close as practically possible to each existing siphonic outlet with each snorkel overflow set at an effective design height so that as the siphonic system becomes overwhelmed the overflow system becomes operational and removes the excess water.


2.Where practical, to increase the "holding" capacity of the gutter,


construction depth of the roof to extend the height of the Unifold®


increasing the overall depth of the gutter. The UNIFOLD® Solution


01384 252777 Phone us


unifold@ampteam.co.uk Click on email


www.gutterliners.com Click on website


by utilising the installation, thereby


UNIFOLD® gutter lining system Gutter systems utilising Siphonic Drainage


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