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Posted by benick on May 24, 2007, 8:29 pm
>I have no experience with this, but I just installed some. You can get
>them with the same pattern in different thicknesses. In the store the 1/2"
>thick tiles (non-"fire-rated", ~$40/case?) would bow when you picked them
>up with two hands right out of the box. The exact same 2'x4' tile size and
>pattern, but "fire-rated", and 5/8" ($60/case) was much better. I don't
>know if it was just the thickness that made them "fire-rated". I'm not
>sure of the prices, or if they are available in cheaper non-"fire-rated" in
>5/8" thickness too. I'm talking about Armstrong tiles at HD, and the
>random-textured pattern which can be cut in any direction from looking at
>it. However I have no idea if the 5/8" fire-rated ones will sag eventually
>over time.
> Gravity gets ALL ceilings over time.Yes, if they are bowed and brown they
> should be replaced. 5/8 Fire rated means the tile was treated with a flame
> retardent and is denser and heavier and "usually" used in comercial
> applications. 1/2 inch is fine for residential. IMHO
>
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