Hi, I need advice on external door glass...
I bought a Georgian-style hardwood front door with 9 panes in the top
half. I need some glass for it. Ideally, I'd like something that will
allow me to recognise the identity of a visitor standing outside,
while not permitting that visitor to easily see inside. I'm envisaging
something that you have to get your eye up close to in order to see
through it. I think I've seen some like that somewhere. Can anyone
advise where I can buy such glass?
Also, which kind of glass is most suitable: toughened, hardened, or
laminated? I've no doubt that the most unbreakable will be the most
expensive. Can anyone give me an idea of the cost?
I am fairly sure any glass will do..safety glass is only required if you
can fall through it and that's not the case with small panes above waist
However security issues may dictate you want something that can;t be
smashed and an arm inserted through to unlock the door etc. Your choice.
Your glazier can advise.
Also you might want to fit double glazing..glass is about twice as
conductive as a hardwood door.
Unidirectional transparency is achieved mainly bu having the hallway
dark. That makes you invisible and the outside crystal clear.
Or you might be thinking of 'bullion' glass? that's pretty expensive
stuff, and looks fairly weird on a paneled door.
Hi, Thanks for the input. Yes, I want something that will be hard to
break, for the exact reason you described.
That's an idea; thanks. I will enquire about the price.
The door already has a couple of pieces of bullion glass in it. I like
the look of that, but it doesn't give quite the level of privacy I'd
like. It's very easy to see past the concentric ripples. Perhaps if it
was green glass rather than clear it would be better.
The door will open straight into a living room, so the need for
privacy is somewhat more than if, say, it was opening into a hallway.
For security, I'd go for laminated (When laminated breaks, it remains
in place. When toughened breaks it forms pea sized chips). Have a look
at the glazing rebates in the door to see how thick glass it can take.
(float, toughened,laminated), 9.6mm.
For greater thicknesses you can consider sealed units. These are
specified as 4/10/4 for instance - glass/gap/glass in mm's - nowadays
it's usual to specify the inner as K glass for it's improved thermal
Glass is very cheap compared to the cost of the door, to the point
that it's probably worth having a spare piece cut at the same time
(assuming they're all the same size - make sure you check!)
Useful advice - thank you. This door will only allow for glass up to
about 6mm thick, so I guess sealed units are not an option. From what
you say, laminate seems the answer. Good idea about buying an extra
For security, any glass near or in a door should be laminated (preferable)
or Georgian wired glass. Toughened only means that a burglar does not get
hurt when he breaks the pane, while ordinary wired glass simply muffles the
already quiet noise of it breaking. For privacy, you need a privacy film,
which is applied to the inside surface and makes the glass opaque, and a
door viewer to look at visitors through.
On Thu, 12 Jul 2007 18:09:53 +0100 Nightjar wrote :
All wired glass on sale now is Georgian AFAIK: this just means that
the wires are in a square grid. In times past you could also get
wired glass with the wires in a chicken wire pattern. Wired glass
will break fairly easily (the wires weaken the glass) but it's much
harder to punch a hole through it as the wires hold the pieces of
glass in place - thus its main use in fire resisting doors and
Tony Bryer SDA UK 'Software to build on' http://www.sda.co.uk
Does it really matter how secure the glass is in a front door?
Presumably it is mortice locked so removing the glass isn't going to
achieve much. Most just get kicked in IME, although round my way
burglary has gone out of style
It is not a good idea to deadlock yourself inside a house at night. There
should always be at least one door that can be opened easily from inside, in
case you need to get out quickly in a fire.
There are not that many people who can keep calm and act rationally in a
smoke-filled building. A lot will go for the exit they know, even if it is
not the best choice. OTOH I have had to help someone out of a window because
he was convinced that crossing 8 feet of smoke-filled stairwell, which I had
just come through, to get to a safe exit was going to kill him. We then had
to work out how to get down from a flat roof, instead of simply walking out
of a door.
Fire safety is an issue, but round here it's a *really* good idea to
keep your door locked at all times you're not actually passing through it -
sneak thieves are by no means un-known. And since there isn't a 2-door house
for hundreds of metres, that leaves a lot of people caught between the devil
and the deep-blue sea.
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