I m using polycarbonate for over 10yrs. No problem beside the frame start to rust. Noisy when raining. But don't see much different with the ajiya awning. The good thing is, inside my home is still bright. Save me from lightning.

This post has been edited by ozak: Jun 1 2009, 10:25 PM

Even cat also can cause damage. Don't play play.

Eh.. He is talking about tempered glass. Same result, tempered glass = laminated glass ?

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Added on October 20, 2011, 9:31 amDo you really need a tempered glass for roof? Is your glass under a load or just a cover?

This post has been edited by ozak: Oct 20 2011, 09:31 AM

I m thinking of a cheapest way.

Tempered glass use mainly for load. Since skylight is just a cover and there is many frame support from below, why still need expensive tempered glass. Probally laminated glass will do. That can reduce the cost. A thick glass already better a lot than the polycarbonate for noise.

But do glass color fade under the sun for long period?

Sorry, I read wrong about the glass fade color.

Polycarbonate color won't fade. It get dirty and look dull when not clean frequent. All my house shade is using polycarbonate for over 10yrs. Cheap at that time.

But glass look better.

I only see a high chance of get leak from many joint there. Can' it design fewer pieces join?

Way back 18yrs ago when I install, RM4.5/ft2.

RM is 4x lower now.