Floor levelling & LVT again

[Spinny]

So I have most of my LVT down now only another 15 sqm to do.

 

However as I feared there is another undulation/raised area within the floor leveller applied on the remaining floor area. The bulk of the floor area is between 0mm and +3mm of target. However there is a ridge/raised area where part of the floor rises to +5mm or +5.5mm and then back down again. Rising from say an acceptable +2-3mm to the peak of +5.5mm and back down to +2mm again over about a 1.4m distance. 500mm rising from +2mm to +5mm, then flatish for 400mm, thenback down to +2mm over 500mm. You can rock a spirit level on the ridge and measure up to a 3-5mm gap under the end of a 1.8m spirit level.

 

There was 1 other smaller area on the floor now laid that had a 'hill' and I asked for it to be reduced as thet said it could be sanded down. However the sanding/grinding process did leave some fine ridges in the floor surface - basically like marks from a sanding/grinding disc. And now the LVT has been layed over that area, these marking suprisingly show through. When viewed into the light at the right angle you can see the markings in the LVT itself, which seems to have conformed itself to any lack of total smoothness in the floor surface.

 

So should I not have my other 'hill' sanded down, as 'messing with it' may reduce the hill/ridge, but end up with the floor perhaps looking worse because the working marks will show through in the LVT surface ? Should I live with a lack of levelness in a decently smooth surface - or risk having a flatter but unsmooth surface by having the flooring contractor work on it ?

 

See photos...

The hill is where the darker pour area is on the floor - now with levels marked on tape by me.

 

The closer photo of the other LVT laid floor area shows how you can see small arcs in the LVT in glancing light from the open door way. This is where the other high spot was sanded/ground down.

 

 

Edited 10 hours ago by Spinny

[Nickfromwales]

@Spinny

 

I'd suggest copying this to the existing thread on this 'journey', as it would have made much more sense there and have greater context.

 

If you want to do that, I can then hide this one .

[Gus Potter]

5 hours ago, Spinny said:

However as I feared there is another undulation/raised area within the floor leveller applied on the remaining floor area. The bulk of the floor area is between 0mm and +3mm of target. However there is a ridge/raised area where part of the floor rises to +5mm or +5.5mm and then back down again. Rising from say an acceptable +2-3mm to the peak of +5.5mm and back down to +2mm again over about a 1.4m distance. 500mm rising from +2mm to +5mm, then flatish for 400mm, thenback down to +2mm over 500mm. You can rock a spirit level on the ridge and measure up to a 3-5mm gap under the end of a 1.8m spirit level.

I appreciate your desire for level and diligence. 

 

Have you considered. If you have an existing house. How level and undulating are the other floors are? If a new house then it is going to take time to bed in, settle.

 

To provide a bit of context. Often as an SE I'll start by designing a house to settle no more differentially by 25mm! Then refine depending on the finishes and how tolerant the structural frame is going to be in terms of differential settlement.  A Swedish log cabin might shrink by 75 - 100mm!

 

I would give the floors you have laid so far a "walk over test" not by you, but by visitors. Ask them if they notice much level or issues with flatness. 

 

Glancing light is always going to show up even tiny changes. This is building, not eye surgery!

 

 

[Mr Punter]

I have an early Victorian rental and the plinth in the kitchen is out by 50mm over 1200mm.  Oddly it is not that noticeable to walk on.