GIB® Plasterboard Control JointsSpecification and Installation Manual

CBI 5113

JAN 2016

GIB® Control Joint TrimsAn essential part of an interior design with long plasterboard walls and ceilings

GIB® PLASTIC SMOOTH CONTROL JOINTThis new white plastic control joint can create a relatively smooth and discrete finish. The painting and stopping to the edge of this trim do require a certain level of skill. Note, movement that the control joint is designed to adjust for may alter the smooth surface finish.

Item #15160 (PSCJ 30) - Available in 3.0m lengths

GIB® PLASTIC W-PROFILE CONTROL JOINTThis new white plastic W-profile control joint provides for a discrete finish and has tear-away tabs for easy installation.

This trim is thicker than the other control joint trims and thus may have implications for the final joint height.

Item #15629 (PEXPH 30) - Available in 3.0m lengths

GIB® GOLDLINE® TRIMS TO CREATE A CONTROL JOINTA combination of a GIB® Goldline® Reveal trim and an L-trim can be used to create a control joint.

The GIB® Goldline® trims have a paper finish (matching the plasterboard paper) and once installed are ready for painting.

Available in 3.0m lengths

Item #12602 - Reveal trim for 10mm board Item #12601 - Reveal trim for 13mm board

Item #12604 - L-trim for 10mm board Item #12598 - L-trim for 13mm board

Where possible (clearances allow) use a 13mm Reveal trim in combination with a 10mm L-trim.

GIB® RONDO® METAL P35 CONTROL JOINTThis metal control joint provides excellent relief for structural movement and is easily installed.

Item #14964 - Available in 3.0m lengths

Tear-away Beads14mm

13mm

10mm or 13mm

18mm

10mm

This side to plasterboard

This side to plasterboard

This side to plasterboard

This side to plasterboard

Removeable Protective Strip

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2FOR FURTHER INFORMATION VISIT WWW.GIB.CO.NZ OR PHONE 0800 100 442

CONTROL JOINTS INSTALLATIONControl joints relieve stress due to movement of dissimilar materials when subjected to changes in temperature and humidity. The joint positions recommended in this literature are designed to accommodate such minor movements but do not allow for significant timber drying shrinkage or structural deformations such as may result from high wind or earthquake forces.

WallsIn long unbroken partitions or wall runs, control joints are required at maximum 12 metre centres in either direction*. They are also required where structural control joints occur in the primary structure.

Door frames extending from floor to ceiling constitute effective control joints in either direction*.

CeilingsExtensive ceiling areas must have control joints spaced at maximum 12 metre centres in either direction*.

It is recommended joints be positioned to intersect lighting fixtures, heating vents or air diffusers or at junctions of corridors with open areas.

Other situationsWhere GIB® plasterboard meets dissimilar materials, it is recommended to isolate using an edge trim, casing bead or control joint.

Control joints may also be required to match other building movement joints and closer spacing may be required to provide seismic relief and minimise the risk of lining damage following an earthquake (check with building designers).

Special detailing is required where control joints are detailed in GIB® performance systems such as fire rated, bracing or noise control systems or a ceiling diaphram (for further information refer to the relevant GIB® system book or phone the GIB® Helpline 0800 100 442).

In stair wells and high timber framed walls, provision can be made for timber movement by installing a control joint or alternatively leaving a 20mm gap between the plasterboard sheets at the midfloor (refer to the GIB® Site Guide for a drawing detail on this). This gap may be covered by a suitable cover batten.*Reference AS/NZS 2589:2007-3.4

INSTALLATION PROCESS1. Ensure the correct gap is left between the plasterboard

sheets during installation (refer to last page). For installation in an existing ceiling a slot can be cut between the plasterboard sheets to the correct gap.

2. Use a thin bed of GIB® setting compound (e.g. GIB Tradeset®) to set the control joint trims into position. Alternatively the GIB® Rondo® P35 and Plastic trims may be stapled into position with 10mm staples either side at 150mm centres.

Take care to keep the centre strip clean. The W-profile and P35 trims have removable tabs or strips to help protect this area.

3. Apply an additional coat of GIB® setting compound carefully feathered out (approx. 150mm wide) immediately to either side of the flexible portion of the control joint trim and leave to set and dry.

4. Scrape off any rough areas of plaster and repeat with another coat of GIB® setting compound carefully feathered out (approx. 250mm wide). Leave to set and dry.

5. Apply a thin coat of GIB® air drying finishing compound to either side carefully feathered out (approx. 300mm wide). Sand smooth when dry.

For more installation and detailing advice refer to the GIB® Site Guide

Control Joints in Ceilings – Recommendations to Reduce Risk of Cracking

There are some common places within the 12m spacing where cracks are most likely to occur in ceilings (as shown below). It is recommended to consider installing control joints in these locations (as shown below) to reduce the risk of cracking.Control joints may also be installed for aesthetic reasons to line up with functional areas of the room or divide the ceiling into smaller sections.

Where hallways exit from a largerceiling area.

At internal corners in irregular shaped ceilings or where the main ceiling would look better divided into smaller sections.

At openings such as skylights, voids or recessed strip lighting. This may also include designated functional areas of a space.

Plan view Plan view Plan view

RECOMMENDED POSITIONING

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3FOR FURTHER INFORMATION VISIT WWW.GIB.CO.NZ OR PHONE 0800 100 442

Winstone Wallboards Limited37 Felix Street, Penrose, 1061 PO Box 12256, Penrose, 1642

Auckland, New Zealand

Phone: +64 9 633 0100 Facsimile: +64 9 633 0101

Website: www.gib.co.nzEmail: info@gib.co.nz

GIB® Helpline: 0800 100 442Facsimile: 0800 229 222

Ceili

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Midfloor

Wal

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GIB® Plastic Control Joint Trims

GIB® Rondo® Metal P35 Control Joint Trim

GIB® Goldline® Paper Faced Metal Trims

CHANGE OF ANGLE JOINTS

FLAT JOINTS

INSTALLATION DETAILS

150mm max.

• Smooth Profile 10–13mm gap

• W-Profile 14–15mm gap

GIB® Plastic Control Trim

Framing Framing Framing

• Smooth Profile 10–13mm gap

• W-Profile 14–15mm gap

• Smooth Profile 10–13mm gap

• W-Profile 14–15mm gap

GIB® Plastic Control Trim

GIB® Rondo® P35 Control Joint

150mm max.

18mm gap

18mm gap

GIB® Rondo® P35 Control Joint

150mm max.

14-17mm gap

14-17mm gap

GIB® Goldline® Paper Faced

Metal Trims**

GIB® Goldline Paper Faced

Metal Trims**

Floor joist

GIB® Plastic Control Joint trim

• Smooth Profile 10–13mm gap

• W-Profile 14–15mm gap

Floor joist

GIB® Rondo® P35 Control Joint

18mm gap

Floor joist

GIB® Goldline® Paper Faced Metal Trims**

14–17mm gap

GIB® Plastic Control Joint Trim

Min angle 135°

Min angle 110°

GIB® Rondo® P35 Control Joint18mm gap

GIB® Rondo® P35 Control Joint

GIB® Goldline®

Reveal Trim15mm gap

*when ceiling battens run perpendicular above control joints, it is recommended to use a batten

jointer above the control joints.

**it is recommended to use a combination of the 10mm

L-Trim and 13mm Reveal where clearances allow.

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