Existing windows guarding requirements

WC_B

I am fitting out an old boarding school to convert to temporary accommodation.
It is a combination of 3 Georgian buildings, one is a Protected Structure.
I understand that the sill must be 800mm above floor level or guarding is required, but there is some leniency for existing buildings.

There are 3 windows conditions, I'm wondering if anyone has experience of addressing:

1. Rear windows
Existing Georgian sash windows. Top of sill varies 700-750mm. Windows open from bottom.
Is additional guarding required or is 700-750 deemed acceptable for existing building?
Can restrictors be used instead of guarding?

2. Front windows
Existing 80s/90s pvc windows. Top of sill varies 700-750mm. Windows open from top, well above 800mm.
The lower level glazing would not meet todays loading requirement for guarding, but is it acceptable as an existing condition?
And again, is 700-750 deemed acceptable for existing building?

3. Rear windows exceptions
There are a couple rear sash windows with top of sills circa 500mm - I assume they need addressed.
Is adding restrictors acceptable or a new guarding inevitable here?

I am going to contact the council building control officer but thought I'd ask here as I'll probably get a quicker response!

Cheers

Victor

Some thoughts.

• Is there any possibility that children will have access?
• There are a variety of window restrictors available to minimise opening. Consider using one that can be easily opened by the fire brigade when they are coming from outside.
• Consider a framed, Georgian-wired glass screen on the inside, to protect someone falling against the glass.
• Make sure you don't make to opening too small - 900 x 450 mm required for escape.

Gumbo

https://www.boards.ie/discussion/2058388193/existing-windows-guarding-requirements

This type of work would have a fire cert and an Assigned Certifier. Your first call should be the your Assigned Certifier.

With regards to your guarding/district or questions, they are separate requirements. Both are required.