* Following a review of the relevant Certifire certificates we are now required to fit insulated glass into apertures that are directly below any face fixed closer. The exception for Arrone closers has been removed following an update to their certificates.

* The requirement for insulated glass to be specified when face fixed closers are present AND the glazed area is over 20% extends to all our standard face fixed closers

* An updated version of Briefing Note BN/175 can be foundHEREwhere you can find further information

* I have updated the information on theAperturespage to suit