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Installation - Fastening Patterns
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TECHNICAL ISSUES:
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Properties
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Installation - Fastening Patterns
Installation - Framing & Joint Treaments
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FREQUENTLY ASKED QUESTIONS
1/2" (12.7 mm) GlasRoc® Sheathing - Wood framed side wall installation of 16" (400 mm) o.c. stud spacing.

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5/8" (15.9 mm) GlasRoc® Sheathing Type X - Wood framed side wall installation of 24" (600 mm) o.c. stud spacing.

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1/2" (12.7 mm) GlasRoc® Sheathing - Steel framed side wall installation of 16" (400 mm) o.c. stud spacing.

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5/8" (15.9 mm) GlasRoc Sheathing steel framed side wall installation of 24" (600 mm) o.c. stud spacing.

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GlasRoc® Sheathing Fastening Patterns
Fastening patterns and other detailed information for the recommended handling, storage, and application of gypsum sheathing can be found below and in the following GA installation specification guides: GA-253 Application of Gypsum Sheathing, GA-254 Fire Resistant Gypsum Sheathing, GA-216 Application and Finishing of Gypsum Board, GA-226 Application of Gypsum Board to Curved Surfaces.

Recommendations for Fasteners
Recommended Fastener Length for Board Thickness

Framing Type
Fastener Description
1/2" (12.7 mm) GlasRoc® Sheathing
5/8" (15.9 mm) GlasRoc® Sheathing Type X
Wood
Hot dip 11 gage, 7/16" (11 mm) head, galvanized nail
1-1/2" (38 mm)
1-3/4" (34 mm)
Wood
Hot dip 12 gage, 7/16" (11 mm) head, galvanized nail
1-1/2" (38 mm)
1-3/4" (34 mm)
Wood/Furring
Bugle head (Type W), corrosion resistant screws with coarse threads
1-1/4" (32 mm)
1-1/4" (32 mm) to 1-5/8" (41 mm)
Steel/Furring
Bugle head (Type S), corrosion resistant screws with fine threads
1" (25 mm)
1-1/4" (32 mm)
Light Steel
Bugle head (Type S), corrosion resistant screws with fine threads
1" (25 mm)
1-1/4" (32 mm)
Light Steel
Bugle head (Type S, Type S-12 & Type W) steel drill screws
1-1/4" (32 mm)
1-1/4" (32 mm) to 1-5/8" (41 mm)
Heavy/Light Steel
Bugle head (Type S-12, Type S) steel drill tip screws
1-1/4" (32 mm)
1-1/4" (32 mm) to 1-5/8" (41 mm)
Heavy Steel
Bugle head (Type S-12) drill tip, fine thread, rust resistant gypsum board screws
1" (25 mm)
1-1/4" (32 mm) to 1-5/8" (41 mm)

Negative Uniform Lateral Loads According to ASTM E 330

Thickness Inches (mm)
Stud Spacing
Fastener & Installation
Ultimate Maximum Load, psf (kPa)
5/8” (15.9 mm)
16” (400 mm) o.c.
screws 1-1/4" (32 mm)2
95 (4.5)
5/8” (15.9 mm)
16” (400 mm) o.c.
roofing nails 1-3/4" (44 mm)1
75 (3.6)
1/2” (12.7 mm)
16” (400 mm) o.c.
roofing nails 1-1/2" (38 mm)1
75 (3.6)
1/2” (12.7 mm)
16” (400 mm) o.c.
screws 1-1/4" (32 mm)2
75 (3.6)
1/2” (12.7 mm)
24” (600 mm) o.c.
roofing nails 1-1/2" (38 mm)1
60 (2.9)
1/2” (12.7 mm)
24” (600 mm) o.c.
screws 1-1/4" (32 mm)2
50 (2.4)
1 - Hot dip 11 gage 7/16" head galvanized nail
2 - Bugle head, corrosion resistant, Type W screws

Fastening Guidelines
• Fasten GlasRoc® Sheathing using only recommended nails or screws.
• Always apply GlasRoc® Sheathing to a flat and even framing surface.
• Drive fasteners to a point even with or slightly below [no greater than 1/32" (0.8 mm)] the surface of GlasRoc® Sheathing, without penetrating glass mat.
• Locate perimeter fasteners a minimum of 3/8" (10 mm) from edges and ends with a maximum spacing of 8" (200 mm) o.c.
• For shear resistance applications, space perimeter fasteners a maximum 4" (100 mm) o.c.
• Space fasteners in the field of the board a maximum of 8" (200 mm) o.c.

Limitations
• Do not use staples or adhesives to fasten GlasRoc® Sheathing to framing members.
• Do not attach GlasRoc® Sheathing to framing surfaces with a plane variance greater than 1/8" (3 mm).
• Do not overdrive nail fasteners. Be careful not to break the protective surface coating, fracture the underlying core, or penetrate the glass mat.
• GlasRoc® Sheathing is not recommended or intended for use as a fastening base.
• Not recommended for applications where continuous exposure temperatures exceed 125°F (52°C).
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