Question
To comply with current building regulations, the minimum cavity width in an external wall is ____
The correct answer is
50 mm
The minimum cavity width specified by current building regulations is typically 50 mm. While wider cavities are often used, especially when accommodating thicker insulation, 50 mm is generally considered the smallest permissible gap. This is a valid cavity width and meets the minimum requirement, but 50 mm is the minimum stated in regulations.
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