Jointing tapes are an important component in GIB Systems and provide critical joint strength between plasterboard sheets. Selecting the appropriate tape is important to achieve the desired performance.

Paper joint tape has been the traditional plasterboard joint reinforcing tape. Fibreglass joint tapes are also available, but it is important to note that not all fibreglass joint tapes are made equal. The team at Winstone Wallboards has identified two distinct categories:

1. Matt fibreglass joint tapes
2. Square mesh woven fibreglass joint tapes

A matt fibreglass joint tape provides a greater level of mechanical strength in all directions due to the random orientation of fibres.

A square mesh woven fibreglass joint tape (which could be pre-glued) will have limited strength in the vertical and horizontal plane. The use of square mesh woven or self-adhesive fibreglass joint tapes is not recommended by Winstone Wallboards and AS/NZS 2589-2017.

GIB RocTape is a matt fibreglass joint tape that achieves superior mechanical strength for flat joint applications. GIB jointing compounds can permeate through the GIB RocTape matt, creating a very strong joint. This means less risk of cosmetic defects, potentially resulting in fewer call backs, saving time and money.

Joints reinforced with GIB RocTape dry faster and do not swell or shrink due to water absorption.

GIB RocTape is coloured yellow for easy identification, and adhesion failure is reduced because compound easily penetrates the fibreglass matt, eliminating inadequate compound application under the tape.

GIB RocTape is bedded in similar to GIB Paper joint tape and can be installed using hand tools or mechanical tools. Both GIB RocTape and GIB Paper joint tape are suitable for use in all GIB Systems. GIB RocTape is designed for flat plasterboard joints. For corner joints use GIB Levelline, GIB Goldline, GIB UltraFlex, or GIB Paper joint tape.