Where the external roof of a zone or an individual component has a horizontal internal ceiling, the roof shallbe entered as having a horizontal orientation and the area of the roof shall be the total horizontal internalsurface area exposed to the conditioned space. The roof pitch angle shall be entered as the SBEM default of45 degrees. See ‘Roofs with Multiple Components 10.06: Horizontal internal ceiling (Examples 1 and 2)’.
Where a horizontal internal ceiling is not present, the roof area shall be that of the internal surface areaexposed to the conditioned space and the orientation shall be the compass position that is ‘faced’ by thepitched component. The pitch angle shall be the angle of the component to the horizontal. See ‘Roofs withMultiple Components 10.06: No horizontal internal ceiling’.
Where a roof structure is constructed of a number of pitched components then each shall be addressedindividually and entered as separate components as part of the model, however if individual componentshave exactly the same set of properties they can be entered as one envelope comprising of the sum area ofthe components. See ‘Roofs with Multiple Components 10.06: Roof structure with number of pitched components’.
Mike Gordon
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