Identifying safety glass:
All installed safety glass should be clearly marked with the British
Standard test reference BS6206, with the letter L for laminated, and T
for toughened, together with the company registration number of the
supplier. If you want to identify (older) safety glass that may not
have been marked at the time there are some tests which will give an
indication, but I would stress should not be relied upon as being
definite, and these are: Toughened - look at the glass carefully side
on, a distortion, not too dissimilar in looks to sheet glass, should
be noticeable where the glass has been heated and cooled.
Also with toughed glass the gas marks will be noticeable when looked
at through polarised sunglasses NOT ordinary sunglasses). With
Laminated, the only real test is an accurate measurement, which should
show up a thickness of 6.4mm and not 6mm as with ordinary float glass.
A calliper type measuring device is really not accurate enough for
this, and I use a laser measure which is held to the glass, and even
on a double glazed sealed unit it can tell me the exact thickness of
each pane, the air gap between, and the overall thickness - all by one
push on a button! Find out some more interesting stuff about it at:
Location of Safety glass in the home:
1972 saw the introduction in the glazing industry of a new 'code of
practice' number CP152 which more or less said that in doors use 6mm
glass instead of 4mm glass on the basis that is is thicker and
therefore harder to break. In fully glazed doors such as patio doors
toughened (tempered) glass was recommended, but all too often not used
because of the extra cost to the seller, and because firms selling on
price had to keep their costs down, people were still having some very
'Safety' glass is now mandatory in the home since 1992 when Building
Regulations part N, covering glazing materials and their locations for
all building work was very first introduced. I believe this was also
updated in 1995 and the regulations apply to not only new, but also
replacement glass. Briefly then, all glass changed since 1992 should
have been done so with the use of safety glass in areas most at risk
(called critical locations).
This means most doors and all glazing in windows where the glass is
within 2ft 7in - or 800mm, of the floor or ground, where particularly
toddlers and the elderly are most at risk.
On 3/3/2016 7:19 AM, firstname.lastname@example.org wrote:
All *new* glass!
> on, a distortion, not too dissimilar in looks to sheet glass, should
Thanks! I will have a look. Not sure I'd want to rely on that,
though (convincing others that, "Yes, this really *is* safety glass,
even though it isn't marked as such!")
Our problem lies with construction prior to that. Back East, there
were similar regulations dating back to the ~60's. But, it wasn't
part of the UBC until later. So, without relying on *markings*
on the glass, it's a crap shoot to know what the rules in place
were when these were installed (or WHAT was installed!).
As well as within a couple of feet of doorways.
I think I'll play it safe and treat them as just double pane
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.