Insulated floating floor support

[diYdidisayyes]

Hi all,

I am levelling off a few concrete pads into 1 level area, new kitchen/diner inside/outside space, and have seen online that my new internal floating floor needs support along the door threshold.

The make up from bottom to top; SLC, DPM, 50mm PIR insulation board, slip layer, 22mm chipboard glued together, and finally some Stone Plastic Composite click lay tiles.

I have an approximately 6m threshold for some slide and turn external doors that I want to have a flush threshold. My question is how should the batten be fixed in place along this threshold? right next to it? With some insulation between it and the threshold? An air gap?

My current plan is to use packers to get the batten to the correct height and level, then screwing it to the concrete, and pour the slc so it flows up to it underneath (to kind of use as a depth guide too). Should I fix it to the aluminium threshold too? Or would this be a bad idea due to the differing thermal expansion between materials? Maybe a high flex silicone?

Feels like I didn't type threshold enough, so here's another, threshold.

Many thanks

 

[Deluks]

Are the doors already installed?
Photos would help.

 

[diYdidisayyes]

Are the doors already installed?
Photos would help.

Yes, doors are already installed.

 

[Deluks]

You could fold up the damp proof course, hold in place with tape.
If batten is necessary for levelling the compound, you can always remove it afterwards, it doesn't need to stay there.
Just ensure the dpm goes up to meet the dpc, tape or sealant to join the two, then lay the PIR right up to the doors.

That pipe's a bit random, what's that for?

 

[diYdidisayyes]

Thanks for the reply. The pipe is our temporary water main solution while some building is getting finished.
I read on a few websites that the batten is needed to support the floating floor at any high traffic edges like door thresholds.

"4. Install preservative treated timber battens where high point loads are expected, for example at thresholds. The top of the battens should be at the same level as the top of the insulation boards."

Taken from the MANNOKbuild website, also says something very similar on Kingspan's guide page.

Was more after how these should be secured; to the concrete floor, the door threshold, or both?

Also, thank you for the advice on dpm and dpc being taped/sealed together

 

[Deluks]

Probably won't make much difference, 6m is a pretty spread out point load.
But manu instructions must always be followed!

Confused about the slc, this is to smooth off the surface before laying the insulation boards? Or to make up the depth?
Do you mean self levelling screed, what depth are we talking?