Smooth deck boards - which way up to avoid cupping?

tomincognito · 23 May 2023

Extremely confusing 50 / 50 split as to what is the right way to lay decking boards. As I'm researching, it seems to depend on the type of timber and level of moisture content...

I will be using kiln dried larch. Leaning towards installing bark side up, but is that right? Pressure treated timber normally goes bark side down because it's wetter and will cup the other way as it dries...? Scientific answers very welcome!

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Smooth deck boards - which way up to avoid cupping?

tomincognito

DIYnot Local

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