Text (12 of 23) in How to Specify and Install GRANEX

Joint Treatment

17-12

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All joints should be caulked using a high quality color-matched sealant such as that supplied, on request by GRAHAM FRP Composites or its distributors. Sealants should be non-yellowing, low in dirt pick- up, resistant to ultra-violet degradation, non-hardening and of low modulus. Most silicones, urethanes and polysulphides are suitable. Consult caulking manufacturer's literature or a technical sales representative before installation. A minimum joint gap should be 1/4" (6.4 mm) between panels up to 12 ft (3.7 m) in length. Most caulking manufacturers recommend a joint width to sealant depth ratio of 2:1 (minimum).

For optimum results, it is recommended that caulking be carried out by a recognized caulking contractor. Every precaution should be taken to protect the stone surface of GRANEX® from excess caulking material, to leave finished work in neat, clean condition with no evidence of spillovers onto adjacent surfaces.

An EPDM type gasket is also available in lieu of a caulked joint. Gaskets come in 3 different profiles and in several colors to match most of the standard aggregates.

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