Skylight glass : tempered or laminated? - The Planted Tank Forum
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post #1 of 2 (permalink) Old 11-17-2006, 08:43 AM Thread Starter
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Skylight glass : tempered or laminated?

I've nowhere neutral to ask about this, so I post it right here anyway (I never want to listen to solely contractor/seller as some tends to be plain commercial minded)

Some of you might know that I'm in the middle of building sunken garden project (check the photo album section if you have not seen it) with a skylight opening.

I'm ordering frame to mount glass as cover, positioned just like a roof (in normal roof angle).The size of each pane of glass is around 75cm x 125cm. Total there will be 6 glass panes of such size mounted on sturdy frame to cover the opening.

No one is going to step on the glass pane once it is mounted (as if anyone is crazy enough to do so), so I believe 5-6mm thickness is enough. However cleaning tools such as squengee or mop on a pole will make a regular monthly visit to keep the glass cleaner.

My question is which one is for me, tempered or laminated glass as the cover.
What do you say?

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post #2 of 2 (permalink) Old 11-26-2006, 11:35 PM
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Typically laminated glass is tempered. It has plastic laminated between the 2 tempered sheets. Tempered shatters into small pieces (5-10mm?) when broken while untempered glass shatters into large shards. When laminated the pieces tend to stay attached to the plastic (not all, but most) and adds a bit more safety as the plastic will catch whatever is breaking the glass (within reason).

A good use of laminated glass is in automotive windshields. If hit by a rock at high velocity the plastic catches the rock and protects the occupants.

I don't see any reason to go with laminated or tempered except for safety reasons. If you had a large opening and had a nearby roof deck with open access you would also want to consider laminated glass with a embedded wire mesh (also used in security situations).
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