The ‘Frame Factor’ for windows and roof lights within SBEM defaults to a value of 0.1 (10%). The assessormust always establish the frame factor of an actual window or roof light and replace the SBEM default with amore appropriate value - unless 0.1 (10%) is found to be appropriate for the actual window.
Where there are multiple windows or roof lights with the same construction and configuration it is onlynecessary for the assessor to establish the frame factor for a representative example and the same valuecan be entered for windows or roof lights having the same construction and configuration. The assessor isexpected to establish an appropriate frame factor for each distinct set of windows and/or roof lights and notto retain the SBEM default frame factor unless they have shown it to be appropriate.
The term “windows” also includes glazed doors being treated as windows.
Mike Gordon
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