The Block’s Foreman Dan was left frustrated during Sunday’s shock episode and went to extreme lengths to prove one couple had lied straight to his face.

The drama unfolded after teammates Han and Can were busted washing their dirty paint brushes and buckets under a tap outside their house – a clear breach of the show’s strict rules.

‘We’ve got springs everywhere. We don’t want to be contaminating our soil near the springs,’ Dan warned, reminding the pair that paint must only be disposed of in a designated wash space off-site.

But the couple flatly denied responsibility for the large coloured puddle pooling on the ground nearby, instead shifting the blame to a plasterer.

‘I’ve just come up and seen the girls rinsing their buckets of paint just here… they reckon they didn’t do this puddle, they reckon that was a plasterer or something,’ an unconvinced Dan told the cameras.

With tensions already running high between the foreman and the pair, Dan decided to call their bluff – retreating to the site office to comb through security camera footage.

The Block’s Foreman Dan was left frustrated during Sunday’s shock episode and went to extreme lengths to prove one couple had lied straight to his face

Sure enough, the footage caught Can red-handed, rinsing her brushes and creating the exact puddle she had denied making.

‘Why lie? Why would you lie about it?’ a frustrated Dan asked.

‘They’ve washed out paint on the ground, they’ve lied to me, they’re not taking ownership,’ he fumed.

Faced with the footage, Can issued a quick apology and promised it wouldn’t happen again – but in a cheeky to-camera piece, she brushed off the scandal with a grin.

‘It’s the first time that I have been caught and told off and it’ll be the last,’ she said.

This is not the first time the Perth-based teammates have been at the centre of a Block scandal.

Last week, tensions reached boiling point after two couples went head-to-head.

Tuesday night’s episode saw Sonny and Alicia accuse Han and Can of stealing their idea after both teams put a heated seat in their Hepburn Spa bathrooms.

The drama unfolded after teammates Han and Can were busted washing their dirty paint brushes and buckets under a tap outside their house – a clear breach of the show’s strict rules

With tensions already running high between the foreman and the pair this season, Dan decided to call their bluff – retreating to The Block’s site office to comb through security camera footage – and he caught them doing exactly what they had denied

In the challenge, the teams were told they could not include underfloor heating in their designs.

However, after doing some ‘out of the box’ thinking, House 4’s Sonny and Alicia fought hard to get heating for a seat approved, an idea they thought would win them the prize up for grabs: a state-of-the-art caravan.

However, after learning that House 2’s Han and Can had also inserted a heated seat in their space, all hell broke loose on site.

‘Why would you do that? If you’ve heard another house is doing it, why are you copying? It makes no sense,’ Alicia could be heard saying in a rant.

‘These girls better have a good excuse for this,’ she added, dubbing the move ‘unoriginal’.

When the couple went to confront Han about the alleged cheating, she denied that she and Can were guilty of any wrongdoing, claiming the chippies had let them in on the idea.

Sonny was livid over the conversation and vented on-camera: ‘It’s just annoying because the legwork I put in made it happen and that was our sort of secret, as such.’

‘We had a point of difference and now we don’t.’

Despite Han defending their decision to build a heated seat, Sonny and Alicia weren’t buying it.

‘When someone lies straight to your face, to me, that’s the worst. Just be honest. I think it’s full of s***. I think she heard our idea,’ Alicia told the cameras.

Later on, Han could be seen filling Can in on the heated conversation, a moment that saw her break down into tears and Can then went to apologise to Sonny and Alicia, adding that the move wasn’t malicious, but a misunderstanding.