Karndean Issue...

Not sure it's a batch issue alone... I installed DV in our lounge, over the last few months I've noticed a lot of gapping appearing.. Although it's only half a mil or so, I notice it even if no one else does

I do know, that DV is produced in 2 different ways., as I questioned why the bottom of the showroom planks I looked at were of a different construction to the ones my client had as samples..
I was told there are two producers in China that they use, and that's why there was a difference.. (Whether what I was told was correct or not remains unknown)

 

What adhy you use RPB

 

Karndean Universal..., onto ply.. (I always opt for the universal.., can sometimes get messy, but generally a faultless adhesive.)

 

And you got gapping ?
I've laid shit loads of DaVinci and never had this problem even on PS
Stick to the ke66 tho pal Wet set is the best way

 

I think as I sit on the floor every day, I notice it more.. As said, it's only half a mil.., and no one else notices it.., maybe I'm just a little to much critical..
I have also noticed, what looks like gapping is actually ingrained "dirt" along the bevelled joints..

I always wet set., on good advice I was given..

KE66 = Universal ?

 

Yes
slight gapping could be caused by slight temperature changes before the adhy has completely cured fully
And yeah bad maintenance cab leave dirt in the bevel

 

Adhesive will not hold LVT in place for ever. Its always off gassing phosphates through its entire life. If the product is getting smaller due to off gassing then no single part adhesive will hold it.

The speed it off gases at depends on temp. The hotter it is (so UFH) the quicker it will shrink.

However , the amount of phosphates / Plasticizers will also have a big impact on how quick a product off gases. The recycled stuff will normally be worse as the manufacturer does not know how many phosphates / Plasticizers are already in the product. Pure Virgin PVC will be the slowest to off gass and will normally keep its original dimensions for the longest period (life cycle)

Anyway, to answer the questions to the floor in pictures. To me i would guess at 3 possible issues !
1- late placement into adhesive and not rolled
2- manufacturing defect
3- Mixture of the above

 

If your flooring is shrinking through plastercize migration after a short period of time then you've defo got a manufacturer issue if it's laid in adhesive with in the correct open

God flooring is a loose battle

 

just googled it to what info is about . Worth a read - https://en.wikipedia.org/wiki/Plasticizer

 

Without reading the link ( going out on a limb lol )

Plastercizers basically give pvc and similar materials the ability to flex and move rather than be complety ridged and brittle Plastercize contain unstable molecules hense do not want to permanently stay where they are so migrate

It's a bit like how unstable chemicals are used to make bombs

 

Ok read it

 

You want to stick to painting

 

I think if a few people that have installed DV recently could look at the floor again, they may notice gapping..
Wonder whether it's anything to do with the narrower bevelled edges shrinking by .25 of a mil??

 

Probably not pal There's two things that effect the size of a tile either temperatures or over time plastercize migration

 

Told you stick to painting