Which sealed unit have I got ?

dal5band · 27 Jun 2008

We have some alluminium patio doors on the back of the house which were installed around 1975 when the extension was built. I am trying to find out what type of glass sealed units we have.
The units appear to be 14mm wide, perhaps 2X4mm glass with a 6mm gap. I cannot see any kyte marks or any kind of marking on the glass.

Does anybody know what kind of units these could be - toughned or just plane glass ? or soemthing else ? What was the building regs in 1975 ?

Thanks

Dal

masona · 27 Jun 2008

I have alluminum patio door since 1981 and mine is laminated safety glass, your glass should be either toughened or laminated glass

Identifying safety glass

Forest Grump · 29 Jun 2008

If they are that old I would say they are either 6.4mm laminated or just plain old 6mm.
You should be able to get the overall thickness by measuring the thickness of the door then putting a straight edge across the face of the door near a corner and measure the distance between glass and straight edge, repeat for other side and deduct these measurements from the overall thickness of the door.
Are you intending replacing them?

dal5band · 8 Jul 2008

Sorry Forest , back again. No I am not intending to replace them. I have replaced the nylon furry seals - I was able to get the same thickness from a local manufacturer of doors. The sealed units are 14mm looks like 4-6-4mm to me.
I was just checking to see if they are safe or I need to do something - been alright for over 20 years, kids are grown up !

dal5band · 9 Jul 2008

Just had another close look and discovered the following reference scratched on the silver separator strip in the DG unit :

C74/11/405K - This may give some clues as to what the glass is ?

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Which sealed unit have I got ?

dal5band

masona

Forest Grump

dal5band

dal5band

DIYnot Local

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