Side to side plank spacing is defined at a minimum of 1/8”. Your choice of fasteners may result in a slightly wider space between the planks. For example, CONCEALoc and Hidden Fasteners provide a space of 1/8” - 3/16” between the planks.
But most decks need and can achieve spacing between the deck boards for drainage. As discussed in Best Practices Guide to Residential Construction : 'When securing the decking, it is important to leave adequate spacing between the boards for water to drain.
I definitely would NOT lay deck boards over top of the existing boards. You need to have ventilation underneath your decking to prevent it from cupping and cracking over time. Decks undergo some of the harshest environments with a lot of sun on one face only and then no sun so there is a lot of expansion and contraction throughout even a single day.
spacing for composite deck boards - Outdoor Decking Floor Gap Spacing Guide for Hardwood & Composite Decking Materials ... Gap spacing guide for your hardwood or composite deck.
A lot of treated-wood decks have been built in the last couple of decades, and many people have become fed-up with the need to frequently seal their wood deck surfaces. Many people don't bother to seal their decks at all, and after a few years they begin to wonder why their deck surfaces look so dreary, tired and weathered.
Composite decking is a popular choice for a stylish and hard-wearing garden deck, as it combines the attractive, natural look of wood with the durability and low-maintenance of a manufactured material.
Composite decking has become the substance of choice for many homeowners. More to the point, wood-plastic composite (WPC) is the wisest option should you will need to help in environmental issues such as deforestation and recycling.
Installing composite decking boards, therefore, isn't the same as installing wood ... stability as wooden ones and require closer joist spacing to avoid sagging. ... and contract as much as wood boards, composite boards need room to move.
Why is composite decking more expensive than treated wood? Composite decking is more expensive to manufacture, but, over time, the maintenance, repair, and/or replacement costs of wood decking exceed the initial investment in a Veranda deck. Top of Page. Installation, Fasteners and Warranty Do Veranda Decking and Railing come with a warranty? Yes.
What happens when you don’t space composite decking.
But most decks need and can achieve spacing between the deck boards for drainage. As discussed in Best Practices Guide to Residential Construction: 'When securing the decking, it is important to leave adequate spacing between the boards for water to drain.