Composite decking products application

Most all Composite decking products are limited in the evaluation report to use as decking for exterior balconies, porches, decks, stair treads, and other exterior walking surfaces. This excludes their use in any type of enclosed area.

Decking cannot be used as a structural member unless approved in the evaluation report. This includes being installed under bearing posts in porch installations. Decking cannot be used as a component of a guard rail system unless approved in the evaluation report.

Evaluation reports might require that some decking products must be installed perpendicular to the supporting members even though the manufacture’s installation instructions show otherwise.

If the Composite decking is approved for use as stair tread material, read the report closely to determine the correct spacing for stair jacks. Some products require that stair jacks be spaced as closely as 12” o.c. or even 8” o.c. In all cases, the research report takes precedence over the manufacturer’s installation instructions so you will not want to rely exclusively on the manufacturer’s installation instructions.

Any questions regarding the use of Composite decking should be directed to the Seventrust.

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