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4specs Discussion Forum » Archive - Product Discussions #3 » Fiber-reinforced Exterior Gypsum panels « Previous Next »

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Ralph Liebing, RA, CSI
Senior Member
Username: rliebing

Post Number: 496
Registered: 02-2003
Posted on Tuesday, November 21, 2006 - 11:05 am:   Edit PostDelete PostPrint Post

Lead looking for this product. Understand it has some inherent decorative facing[?] or appearance.

Appreciate any hlep or comments.
George A. Everding, AIA, CSI, CCS, CCCA
Senior Member
Username: geverding

Post Number: 233
Registered: 11-2004
Posted on Tuesday, November 21, 2006 - 11:29 am:   Edit PostDelete PostPrint Post

Ralph-

Use glass reinforced gypsum interior, use glass reinforced concrete exterior. That's always been my rule of thumb, but I am not sure gypsum can't be used on exterior. However, most GRG manufacturer's also make GRC.

I am emailing you my most recent GRG specification, see if that helps.

By the way, see "09 2700 - Plaster Fabrications" on 4specs for the manufacturers.
Anne Whitacre, FCSI CCS
Senior Member
Username: awhitacre

Post Number: 412
Registered: 07-2002
Posted on Tuesday, November 21, 2006 - 05:20 pm:   Edit PostDelete PostPrint Post

we had some issues with the gfrg (and gfrc) moving around too much on the building and pulling out the fasteners. keep the panel sizes relatively small and reinforce them -- a lot. also make sure you have an experienced fabricator, because in direct sunlight if the section is too thin, they can expand and bow a little bit.
there is nothing inherent to the product; it can be cast into a mold to take on various appearances and it may be possible to specify both a face mix (for appearance) and a backup mix (for cost) and have them be different mixes.

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