I've seen various comments on this site about the requirement for ventilation in a cold flat roof. Our new flat roof has moved from being a warm roof to a cold one after architect was required to lower the height of roof as it was in excess the actual planning application! As a result the roof height has had to be lowered and insulation put within the beams to compensate for lower height.
Building Control recently refused to OK the new roof as it was now a cold roof and therefore required ventilation. I'm told it will require 3 days of work by builders to construct vents and I am expecting to be asked to pay for this additional work as it will be classed as a building control issue. Should the architect have known though when re-designing the roof that ventilation as a cold roof would be required and therefore cleared with building control the ventilation requirements, rather than just building it with no ventilation and only realising the problem after the roof was complete? I ask as everywhere I look it seems fairly clear that cold flat roofs require ventilation.
Building Control recently refused to OK the new roof as it was now a cold roof and therefore required ventilation. I'm told it will require 3 days of work by builders to construct vents and I am expecting to be asked to pay for this additional work as it will be classed as a building control issue. Should the architect have known though when re-designing the roof that ventilation as a cold roof would be required and therefore cleared with building control the ventilation requirements, rather than just building it with no ventilation and only realising the problem after the roof was complete? I ask as everywhere I look it seems fairly clear that cold flat roofs require ventilation.