Wall Framing
Where required, diagonal let-in bracing
is recommended for corners.
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1/2" (12.7 mm) GlasRoc® Sheathing
should be fastened to wood or steel framing spaced no more
than a maximum of 16" (400 mm) o.c. |
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5/8" (15.9 mm) GlasRoc® Sheathing
Type X should be fastened to wood or steel framing spaced
no more than a maximum of 24" (600 mm) o.c. |
Note: Structural
testing is based on 16" (400 mm) o.c. wood stud spacing.
Ceiling and Soffit Framing
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1/2" (12.7 mm) GlasRoc® Sheathing
should be fastened to wood or steel framing spaced
no more than a maximum of 16" (400 mm) o.c.
for parallel to stud framing and maximum of 24" (600
mm) o.c. for perpendicular to stud framing. |
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5/8" (15.9 mm) GlasRoc® Sheathing
Type X should be fastened to framing spaced no more
than a maximum of 24" (600 mm) o.c. parallel
or perpendicular to wood or steel framing. |
Joint Treatment
Depending upon the exterior finishing
system specified, a joint treatment may not be required when
using GlasRoc® Sheathing.
For applications requiring a joint treatment,
there are several methods which offer short term (up to 6 months)
or long term (6 months or longer) protection from moisture
intrusion at joints. Consult your exterior finishing system
manufacturer, cladding manufacturer or local building code
authority to determine the appropriate joint treatment.
Short Term - Wind and/or Rain
Barrier
A short term joint treatment is recommended
when GlasRoc® Sheathing will
be exposed to outdoor environmental conditions for up to 6
months or where a wind barrier is required. Two alternatives
are recommended:
Wind Barrier: Use 2” (50
mm) minimum wide contractor sheathing tape such as 3M® Brand
Y-8086 Contractor Sheathing Tape, Tuck® 20502
Contractor Sheathing Tape or equivalent. For optimal protection,
apply the tape in long lengths. Sheathing tapes should be pressed
firmly against the panel joints.
Wind and Rain Barrier: Use
exterior grade caulk such as Dow Corning 795 Silicone Building
Sealant or equivalent. Exterior grade caulk should be applied
in a 3/8” (10 mm) bead to all joint seams. For joint
openings wider than 1/8” (3 mm), apply a backer rod to
the joint. Use a trowel to compress the caulk into the joints.
For optimal protection, caulk beads should be continuous to
maintain a continuous barrier.
Long Term - Wind and Water Barrier
A long term joint treatment
is recommended where a wind and water barrier is required as
an alternative to a separate weather-resistive barrier.
Wind and Water Barrier: Use
an exterior grade caulk such as Dow Corning 795 Building Sealant
or equivalent in conjunction with a glass mesh joint tape.
For joint openings wider than 1/8” (3 mm), apply a backer
rod to the joint. Apply the glass mesh tape to all board joints
with overlaps at intersections. Apply a minimum 3/8” (10
mm) bead of sealant over the tape at the joints and hand trowel
the sealant level creating a flat surface. Apply sealant to
each exposed fastener and trowel level.
Note: Refer to exterior
cladding manufacturer and local codes to determine if a weather
resistive barrier is required over gypsum sheathing and/or
over joint penetrations and openings.
CAUTION: This
product contains continuous filament fiberglass. Fibers may
be released in the normal handling of this product which
can cause respiratory, minor skin and eye irritations. Avoid contact
with eyes and skin.
Do not breathe dust. Signs and symptoms
of over-exposure include temporary irritation of eyes, nose,
throat and lungs. Aggravated medical conditions may include
respiratory illness, however there are first aid procedures
that can reduce risk of illness. These include moving to area
for fresh air in the case of inhalation. If material irritates
the eye, flush with running water for 15 minutes. When contact
with skin occurs, wash gently with soap and water. However,
when used under normal circumstances, following installation
instructions, this product is not expected to present health
hazards. For more information, consult the GlasRoc® Material
Safety Data Sheet by contacting CertainTeed at 800-233-8990.
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