Experts say your decking is upside down and the grooves are not there for grip

A home-styling expert has left people reeling after claiming that we’ve all laid our decking upside down – and there’s plenty of evidence to back it up.

Instagram account My_London_home shares tips and tricks to decorate and brighten up your home, but recently racked up thousands of views on a video that may just ruin your evening drinks in the garden this summer.

The caption reads: “I have a public service announcement for anyone that hasn’t seen my stories. YOUR DECKING IS UPSIDE DOWN!

“Yep, ridged side up? That’s upside down. The ridges are to encourage circulation and stop the rot. They do not add extra grip. They are not meant to be seen. OK I’m done now. You’re welcome.”

Many people, like us, dismissed the claim but it appears the decking experts agree that it was designed for the ridge side to be facing down.

Decking firm Softwoods backs up the argument, stating: “Every decking timber manufacturer will tell you: the proper way to install a board is ridge side down.

“The ridges, they say, were designed to let air circulate underneath the boards. This, according to them, prevents the buildup of moisture and, consequently, of mould.

“The ridges are not there to keep you from slipping and sliding around your deck. Nor are they intended to make your deck look nice.”

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Build.com.au also says the ridges are not there for grip, weighing in on the debate by saying: “Boards should unequivocally be placed grooves down”, adding that if you are worried about grip on the smooth side, you should use a sealant to “texturise the wood or rubberise it” instead.

The Instagram user replied to people in the comments to say some decking has ridges on both sides for aesthetics, but in general the boards should be installed smooth side up.

One person replied to say they were converted to the ‘correct’ way of doing things, writing: “And far more pretty to look at. Who. Knew. Mind blown.”

A second said: “Just told my husband. He initially looked at me like I was mad, but now he’s fully onboard with this revelation.”

And another added: “Great to know! Wow shocking to think it’s always installed upside down!”