Changing the roof?

[CalvinHobbes]

We are through planning but the zinc roof is giving us a serious headache due to cost. The builder suggested we change it for an ordinary tiled roof. QS agreed and said it should only cost a small planning fee. However what about all the other fees like structural engineer, saps etc? At this stage just trying to reduce costs so if it saves 30k we are interested. 

[Bonner]

Fees should only amount to a few hundred. Tiled roof will be heavier than sheet metal so structural calcs will need to be redone. Our roof truss supplier did those FOC. Keep in mind the change needs to be considered from an architectural point of view. Due to larger roof structure, eaves and verges could look different. There shouldn’t be any change in SAP, unless the larger roof timbers change your insulation strategy.