Episode 16 Recap: Shelley Craft is 'not sold' on Eliza and Liberty's bathroom feature and one team wins a game-changing 'secret' weapon

The Blockheads know by now to expect a few hurdles before they get to the finish line.

And right on queue (on the final Friday before Guest Bathroom Room Reveals) those hurdles present themselves.

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Sisters Eliza and Liberty have finally received their highly-anticipated moss wall.

If you need any reminding of what a moss wall is, Eliza explains: "It's dead, it was alive, but it looks the same dead as alive, you don't have to water it, it last 15 plus years, it's bacteria resistant, dust resistant."

Despite all those enviable features, there's a problem with it.

"There's an issue with the moss wall. Usually it's put on marine plyboard but due to the tight turnaround it had to go on MDF, which is not allowed in bathrooms," Eliza says.

That spells trouble for the sisters, but the supplier swoops in and ensures a five-year warranty on the product and the wall it will be mounted on. 

Foreman Dan is happy with that promise and the sisters' moss wall gets over the line. 

There seems to be another issue with the moss wall – not everybody likes it.

WATCH: It's hard not to take personally': The teams on how they handle harsh feedback from the judges

During their weekly walkarounds of the rooms, Scott Cam and Shelley Craft finally come face to face with the furry green wall.

"Isn't it beautiful?" Eliza exclaims.

But not everyone tends to agree.

"I don't know if it is [beautiful] or not ," Shelley remains undecided. 

And while Eliza gives her best saleswoman pitch of all the capabilities of the moss wall, Shelley is still not sure.

"I'm not sold," Shelley reveals.

"Is it easy to remove if they don't like it?" she asks a follow up question. 

And so the sisters come to the only natural conclusion: "Shelley was like, 'I hate it.'"

There's less uncertainty as Scott and Shelley visit a solo Kyle in The Block's smallest bathroom ever, and deem that no, size doesn't matter.

And Kyle for one is glad to hear that. 

Kristy and Brett are itching for a visit from Scott and Shelley, and say they find their walkarounds "even more valuable than the judging". 

They dish on their expensive plans to have venetian plaster even on the ceiling. 

EXCLUSIVE: Eliza and Liberty get real about regrets they have about 'that' moss wall

"Why are you doing that? I reckon the judges will say that's a waste of money," Scott and Shelley advise against the expense. 

But Kristy – who is hoping opulence will guarantee her a win – says its wow factor is worth every penny.

Over at House 4, Steph and Gian explain to Scott and Shelley that "continuity is key", not only in their style and design but hopefully continuity in winning. They're hoping to hit a hattrick this week.

House 2 haven't been as fortunate and are yet to secure a Room Reveal win, so Scotty throws them a bone and sends Leah and Ash to a new play a new game known as the 'Mitre10 Claw'.

Just as you might expect, it's a claw machine with a prize attached to each stuffed toy inside. 

Leah and Ash manage to nab $500 and hopefully it's the start of a streak of good luck. 

Speaking of good luck streaks, Steph and Gian's seems to be coming to an end. 

Steph and Gian's stonemasons have arrived, but 15 minutes too late for the afternoon site induction and they haven't done the online induction either. 

With Steph out shopping and Gian out picking up a delivery, Foreman Dan isn't pleased to be picking up the pieces in their absence. 

But that's not the worst part – no induction today means the stonemasons will likely not install Steph and Gian's vanity before Sunday's Room Reveal, as Andre the stonemason isn't available any other time this week. 

That puts the pressure on. "It was a tense moment for everybody," Gian later tells cameras.  

WATCH: Leah gets into a fiery altercation with on-site tradies

But persistence will get you places, and after much convincing Gian manages to get Andre the stonemason to come on time for induction the following day. And so the lucky streak continues for House 4.

After a whirlwind trip to WA to attend a wedding and stay with her boys, Leslie is back on The Block.

And it's perfect timing because the contestants are about to compete in the highly anticipated breakdancing competition which you can watch here.  

Apart from all the hectic costumes and even more hectic moves, there's one very important takeaway from the break dancing competition. 

Winners Eliza and Liberty nab $5,000 and a secret bonus point Gnome that they're "not allowed to tell anyone else about".

"If we tell any of the other contestants about it, the prize is null and void," Liberty explains. 

READ MORE: A look back at the history of The Block's infamous Gnome

With the sisters sworn to secrecy we can only imagine what will happen when the time comes for everyone to find out. Watch this space.

The Block airs Sunday at 7.00pm and Monday to Wednesday at 7.30pm on Nine and 9Now. Catch up on all the 9Now. 

Stream every episode ever of The Block for free on 9Now.