John Sayers' Recording Studio Design Forum Archive

Which is best when it comes to laminated glass?

PVB or Resins laminated?

I guess it depends upon the layers, but the resin method almost seems like it would make the sound work harder to get through.

Not sure on that one Sam, maybe Rod can tell us? Steve

I'm confused. I looked at the site that Giles referenced (Viracon) and the values do not seem to indicate that 1/4" laminate is as good as 1/2" float. I graphed the values and here is how they look. To me it seems that 1/4" laminate is not as good as 1/2" float. Now, 1/2" float versus 1/2" laminate defiantely looks better but 1/2" laminate is very pricey.

I promise I'm not trying to pick a fight here. I just want to truly understand the glass side of studio construction since that is the point we are at right now

I don't remember seeing anything that said 1/4 laminate would equal 1/2 float glass, more like equal thickness laminate would be maybe 4-6 dB better than float; but those graphs surprise me, I would have thought there would be more difference. They are for single panels, right? Steve

Yo Steve,

In an earlier post in this topic Giles said, "1/4" Laminated glass is equivalent to 1/2" Thick regular glass." So, I pulled the data from the charts and graphed them.

I was really surprised to especially considering if you read the sales literature from Viracon they really push the laminate stuff.

Yeah, the graphs are for only one pane.

The other website Giles provided to Domesticsoundproofing had much better data on float, laminate, and the airspaces inbetween. However, they only had their own graphs and not the raw STC data that we could use for own own graphing pleasure.

Peace,
Brad

A corection to avoid confusion. STC is a summary number that includes many factors in its calculation. The numbers you are plotting are the Transimission Losses (TLs) at the frequency bands. When comparing TLs check that the band widths are the same between test data.

Andre