I'm planning a deck build in the UK. The 3 biggest DIY retailers here all seem to sell decking boards which are grooved on both sides. There's a lot of mixed advice from the videos/instructions I've been checking out. Some say it's a matter of preference and others say you must absolutely put the grooved side down: http://www.build.com.au/should-decking-grooves-face-or-down

So, should I be looking elsewhere for boards or does it really matter?

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    You should follow the manufacturer's installation instructions. Not doing so could void any warranties, and/or reduce the useful life of the product. – Tester101 Jul 10 '15 at 16:53
  • @Tester101 is 100% correct. Go to the source for the information. – BrownRedHawk Jul 10 '15 at 17:33
  • Sure, but the manufacturers here just say in their instructional videos that it's a matter of preference. I'm curious about people outside the UK who would have more experience in decking – beirtipol Jul 10 '15 at 21:15
  • The grooved boards are not common outside of the UK. At least not in North America. They are very few and far between. (In fact, I can only recall ever seeing them on thermally modified decking) – ryanwinchester Jul 29 '15 at 8:26
  • Good to know, thanks. I finally found smooth boards here. Very difficult to get good quality wood for decks here! – beirtipol Jul 29 '15 at 12:07

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