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Old double-glazed window upand_at_them 08-19-2006
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Posted by on August 19, 2006, 9:13 am
One of the original windows in my house (53 years old) is a nice
side-to-side slider with double-glazed sashes. One of the outside
panes of glass is cracked and I'd like to replace it.

Here's the problem though...


The outside pane of glass has a wood frame and is screwed to the inside

frame. Until now I've never noticed any condensation between the panes

of glass, but I wonder if I replace this pane if I'll inadvertently
allow moisture or other undesirables between the panes.


I don't think they were using vacuum machines on these windows 50+
years ago. Also, I'm certain there is no gas between the glass panes.
And the screws fastening this thing is are big and certainly look like
this was supposed to be maintainable.


So how did they (and how can I) assemble this so as not to have a
problem with condensation between the panes?


Mike


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Posted by hallerb@aol.com on August 19, 2006, 9:21 am
long term theres NO way to keep a vacuumn and besides a leak from the
outside moist air would cause condensation:(

Today some try injecting gas but it likely leaks out over time:(

double pane windows are assembled at and in a regular space, the panes
are glued sealed together with some dessicant to absorb moisture.

locally theres a glass shop where you bring in the glass unit in the AM
and pick up a new unit by late afternoon....

not expprensive either.


Posted by Colbyt on August 19, 2006, 4:23 pm

> One of the original windows in my house (53 years old) is a nice
> side-to-side slider with double-glazed sashes. One of the outside
> panes of glass is cracked and I'd like to replace it.
>
> Here's the problem though...
>
>
> The outside pane of glass has a wood frame and is screwed to the inside
>
> frame. Until now I've never noticed any condensation between the panes
>
> of glass, but I wonder if I replace this pane if I'll inadvertently
> allow moisture or other undesirables between the panes.
>
>
> I don't think they were using vacuum machines on these windows 50+
> years ago. Also, I'm certain there is no gas between the glass panes.
> And the screws fastening this thing is are big and certainly look like
> this was supposed to be maintainable.
>
>
> So how did they (and how can I) assemble this so as not to have a
> problem with condensation between the panes?
>



I have a hunch it may have been modified over the years. If you have never
noticed moisture between the glass it almost has to be a sealed unit.

You have to fix it so you might as well open it up and see what is in there.
All decent sized cities have at least one company that makes sealed units.

Be sure to post back here with what you find.



Posted by dicko on August 19, 2006, 6:36 pm
On Sat, 19 Aug 2006 16:23:41 -0400, "Colbyt"

>
>> One of the original windows in my house (53 years old) is a nice
>> side-to-side slider with double-glazed sashes. One of the outside
>> panes of glass is cracked and I'd like to replace it.
>>
>> Here's the problem though...
>>
>>
>> The outside pane of glass has a wood frame and is screwed to the inside
>>
>> frame. Until now I've never noticed any condensation between the panes
>>
>> of glass, but I wonder if I replace this pane if I'll inadvertently
>> allow moisture or other undesirables between the panes.
>>
>>
>> I don't think they were using vacuum machines on these windows 50+
>> years ago. Also, I'm certain there is no gas between the glass panes.
>> And the screws fastening this thing is are big and certainly look like
>> this was supposed to be maintainable.
>>
>>
>> So how did they (and how can I) assemble this so as not to have a
>> problem with condensation between the panes?
>>
>
>
>
>I have a hunch it may have been modified over the years. If you have never
>noticed moisture between the glass it almost has to be a sealed unit.
>
>You have to fix it so you might as well open it up and see what is in there.
>All decent sized cities have at least one company that makes sealed units.
>
>Be sure to post back here with what you find.
>

My house, built in 1957 has 2 types of windows.

First, just like the OP described, two spearate panes of glass
separated by wood. Little thumb levers hold the inner pane in place
allowing you to remove it for cleaning. The outer pane is glazed into
the frame. The panes are separated by about half an inch. I've never
had a moisture/fogging problem with them.

The second type is a true insulated glass window. I had one replaced
and the installer took one look at them and mentioned that they arent
maded like that any more. He called it a "leaded" window because the
separator was made of lead, unlike those made today. He said it had
been a long time since he'd seen one.

dickm




Posted by Colbyt on August 19, 2006, 8:31 pm

> On Sat, 19 Aug 2006 16:23:41 -0400, "Colbyt"
>
>>
>>> One of the original windows in my house (53 years old) is a nice
>>> side-to-side slider with double-glazed sashes. One of the outside
>>> panes of glass is cracked and I'd like to replace it.
>>>
>>> Here's the problem though...
>>>
>>>
>>> The outside pane of glass has a wood frame and is screwed to the inside
>>>
>>> frame. Until now I've never noticed any condensation between the panes
>>>
>>> of glass, but I wonder if I replace this pane if I'll inadvertently
>>> allow moisture or other undesirables between the panes.
>>>
>>>
>>> I don't think they were using vacuum machines on these windows 50+
>>> years ago. Also, I'm certain there is no gas between the glass panes.
>>> And the screws fastening this thing is are big and certainly look like
>>> this was supposed to be maintainable.
>>>
>>>
>>> So how did they (and how can I) assemble this so as not to have a
>>> problem with condensation between the panes?
>>>
>>
>>
>>
>>I have a hunch it may have been modified over the years. If you have
>>never
>>noticed moisture between the glass it almost has to be a sealed unit.
>>
>>You have to fix it so you might as well open it up and see what is in
>>there.
>>All decent sized cities have at least one company that makes sealed units.
>>
>>Be sure to post back here with what you find.
>>
>
> My house, built in 1957 has 2 types of windows.
>
> First, just like the OP described, two spearate panes of glass
> separated by wood. Little thumb levers hold the inner pane in place
> allowing you to remove it for cleaning. The outer pane is glazed into
> the frame. The panes are separated by about half an inch. I've never
> had a moisture/fogging problem with them.
>
> The second type is a true insulated glass window. I had one replaced
> and the installer took one look at them and mentioned that they arent
> maded like that any more. He called it a "leaded" window because the
> separator was made of lead, unlike those made today. He said it had
> been a long time since he'd seen one.
>
> dickm
>

I have seen your first type. Never seen the second.



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