This approved document deals with the following requirement from Part K of Schedule 1 to the Building Regulations 2010.
Safe access for cleaning windows etc.
K5.4—Provision shall be made for any windows, skylights, or any transparent or translucent walls, ceilings or roofs to be safely accessible for cleaning.
Limits on application
Requirement K5.4 does not apply to:
(a) dwellings, or
(b) any transparent or translucent elements whose surfaces are not intended to be cleaned.
In the Secretary of State’s view, you can meet requirement K5.4 if, where a person may fall from a window, you provide safe means of access for cleaning both sides of the glass.