Karndean Issue...

If the screed was buffed and is flat then fair enough. So next thing I'd check is the edge of the planks. You're looking to see if the bottom edge protrudes further than the top. If it does, the floor will never look tightly fitted without back cutting the lower edge off.... Which anyone on here will tell you is a pain in the backside.

 

Jambo - as Karndeans report stated ... there are high points in the subfloor (screed)

 

Bottom edge protrudes further than the top?? Don't get ya?

 

OK so, if there are high spots on the floor they must be taken down. Also, as Daz said filler is not acceptable. They're gonna have to lift planks, buff down any high spots to give a flat surface then lay new planks.

 

Boards = planks

Copper plate? On what? The screed or you mean a sanding disc?

 

Ok. Thanks guys.

I'll speak to them tomorrow...

This is a quick vid I've just done now of one part:

 

you shouldnt be using a colour sealent out of a mastic gun, ive never come across this as ive never fitted this type of Karndean if hes used all the correct prep and buffed it off the floor hes laying on should be flat, you'll be able to tell if the floors flat by the light reflecting of the lvt it will show uneveness up in the subfloor,
if you can get your fingernail in the gap then its a gap if your nail is running along the board then the board hasnt been layed in the glue fast enough maybe, so its slightly raised, high temp adhesive hasnt got a long working time so he may have spread out more than he can lay and its gone off.

Cant Karndean tell you what the problem is after all they are the experts?

 

The copper plate went on the bottom of a sanding machine .... its was circular...!?

 

I can really see the unevenness when the sun shines!!

Karndean weren't helpful AT ALL!

 

So the prep was
Plywood Then a fibre screed on it?
Can't see them using a copper disc as that's for taking paint off an old adhesive really. He must of changed it to a sanding disc on the buffer.
In any case if floor not flat that won't help. But for me the White lines are the product.

 

"Karndean werent helpfull at all"
if they werent helpfull then id say the white lines were a product fault cut slightly on the bevel so you can see the base instead of the print colour of board. the gaps probably fitting error if there from the start.

 

Karndean will never blame their products
If he did use a copper disc then jeeeesssuuuss christ he's hardcore!!!

 

If it was a product fault, then I'd expect to maybe see it in one room, in one area... i.e. from one box. But this is in all 3 rooms... We're talking 40 sq/m...

And I'm 99% sure it was copper as I remember asking him WTF the noise was!

 

Not being funny but I've seen the white kind issue on numerous karndean jobs, poorly made material for my money you dont get it with spacia or distinctive, have seen it on colonia and galleria though so I'd say it is to do with quality/how made of the tile, is there any spares if there's look at the header end and let us know if it's dished out of the pack/new tile.

In regards to product faults it can run through while batches....

 

What temp did you put the ufh onto when you firststarted to use it after job done?

 

I've got one of two spare boards in the loft, can check them tomorrow - what to look for?

Re: UFH - around 20 degrees, then gradually worked up.

 

Your looking to see if on the short end of the plank, the header, the tile is flat or if it is dished, basically is the whole end flat or is it slightly ramping up on the edges kind of like the way a dish is or another example would be like the shape of s banana just nowhere near as extreme

 

Ive had the white lines a few times last one was two weeks ago on knight tile. it is a product fault and when i called karndean technical there answer was to roll the floor which i had done so not helpful which is the usual from them. Also the ufh should be turned up gradually not wacked straight on at that temp.I fitted the da vinci mebau about two months ago and didnt have issues but had issues with the tiles not going together on a job the other da which left slight gaps so had to swap tiles out.

 

Karndean are famous for their bloody shoddy buttin with their tiles, Im starting the really dislike the stuff. I dread fitting on UFH as it always seems to give me issues when using Karndean. Not had any issues with expona or moduleo on UFH, only with Karndean

 

Loads of reported issues with da Vinci gapping, it's a batch issue IMO