Glass sizes for Velux windows

[cgkstevenson]

My two Velux GHL 606 windows glass are cracked due to intense heat. I need to get replacement glass but information about the actual glass size (thickness and spacer) is contradictory and Velux advise 'replace the whole unit' . Some advice is 'all pre 2001 windows are 16mm' , other is 'glass is 24mm' , and ' 4 14 6 ' . Replacing the units looks straightforward enough, and possibly can be done in situ without removing the window. I know from experience how heavy these windows are.. It's difficult to measure the actual unit but it doesn't look like 24mm

 

[freddiemercurystwin]

To measure the DG unit thickness follow the guide in the last post in this thread: https://www.diynot.com/diy/threads/when-is-it-best-to-replace-windows.607099/#post-5426108

 

[catlad]

It will be 16mm at that age! velux do sell a replacement but only in 24mm now, so you would need a conversion kit also.

 

[ronniecabers]

It will be 16mm at that age! velux do sell a replacement but only in 24mm now, so you would need a conversion kit also.

You'll get a 16mm unit from any reputable double glazing manufacturer. And glass size for a 606 should be 988 x 994. ( visible glass size ,.. 962 x 930 )..obviously check you are happy with the size as I'm not being held responsible if it's wrong lol.... make sure you get at least toughened glass as a replacement , wouldn't want standard 4mm window glass above my head personally, never understood how velux got away with that one.
Last time we tried to purchase a conversion kit they weren't available...

 

[catlad]

Last time we tried to purchase a conversion kit they weren't available...

Yes I heard they were Phasing them out as stocks ran out.

 

[cgkstevenson]

I thought it must have been heat which caused them to crack but other window facing the same way is ok. It seems it 'could' have been my 3 year old grand children playing with things...

Anyway, the answer to glass thickness is 24mm, which Velux finally confirmed, after initially saying it was 16 mm !

 

[catlad]

Anyway, the answer to glass thickness is 24mm, which Velux finally confirmed, after initially saying it was 16 mm !

Have you given velux the code for the window? If so have they come back and said its manufactured with 24mm glass ?

 

[Mark 9002]

I Know this is quite an old post, but just wondering how you got on with the Pane replacement. Did you manage to do it with the Sash in situ ?. I'll be doing this myself shortly with an old GGL606. Velux no longer do the Conversion kits for this size nor do the supply the 15mm glazing units, but my local Glass shop had the size and supplied me with a 998 x 994 4-8-4 Glazing unit. Just rxd the sealing kit from Velux so wondering how you got on ?