Raising Floor Level

[the-ben]

Hi

I have read the stickies but to no avail, I have about a 10mm heght difference between my lounge/dining room and kitchen,

I have laid a screed which has settled at about 2-2.5mm I also have some compacted wood insulation and damp proof to lay which will add about another 7 to start but over time i think it will settle and compress to about 5.

Am laying laminate flooring on top, would i be ok to to lay damp proof then a layer of 3-4 mm ply sheets before the laminate?

 

[noseall]

sounds ok to me.

 

[WoodYouLike]

Don't forget the 3mm you need between plywood and laminate for sound-insulation underlayment.

 

[the-ben]

Don't forget the 3mm you need between plywood and laminate for sound-insulation underlayment.

Can you explain a bit more please?

 

[WoodYouLike]

If you're planning to fill the rest of the 'gap' with plywood so when the laminate is installed it is on one level, you have to keep in mind that the sound-insulation underlayment you need between the plywood (subfloor) and the laminate takes up 'space' too (2 -3 mm) = hence calculate the 'gap' first, deduct the thickness of the laminate and the 2-3mm underlayment to see how thick your plywood needs to be.

 

[the-ben]

Ah see now,

I had thought of that

Damp proof material = 1mm

Insulation on a test has compressed to about 4.5 - 5mm

i still think it needs to be about 3 mm thick,

Was aware of the gap calculation just wasn't sure if it was advisable to use ply as a subfloor,

On another note is it best to fix it I.e bolt it to concrete? or leave it floating?

and should there be a gap in between the sheets and walls, (no longer have skirting board up) or but it hard against each other