Questions about Milgard STCs

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Anlina
Posts: 29
Joined: Thu Jan 17, 2019 3:40 am

Questions about Milgard STCs

#1 Post by Anlina »

In comparing Milgard standard aluminum sliders, I see this on their site:

When Glass 1 is 0.125 and Glass 2 is 0.25, the STC is 30.

But when Glass 1 is 0.1875 and Glass 2 is 0.125, the STC is 31. And it costs a lot less.
It seems to me that the second one is thinner, yet the STC is higher.
What am I missing? :)

And if the STC of the Milgard aluminum casement 1/4 over 7/32 lami is 36,
is there a way to know what the STC of their 3/16 over 7/32 lami would be (it's unrated)?

Thank you again!

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Windows on Washington
Posts: 5311
Joined: Fri Oct 27, 2006 11:23 am
Location: DC Metropolitan Area-Maryland/Virginia/DC

Re: Questions about Milgard STCs

#2 Post by Windows on Washington »

Tough to say. STC is a very finicky type calculation.

You can "sort of" extrapolate based on data projections, but the more likely conclusion is the ones that they have testing on...were the best they could do.

Anlina
Posts: 29
Joined: Thu Jan 17, 2019 3:40 am

Re: Questions about Milgard STCs

#3 Post by Anlina »

Thanks, Windows on Washington!

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