Screed depth advice

[catrionag]

Getting our Cemfloor screed poured tomorrow (fingers and toes are crossed that it gets above freezing...) but I'm still not sure how much wiggle room we should be leaving for the install of the engineered wood flooring on top of it. Current available space is roughly 80mm between the top of the insulation layer and the door thresholds. Our engineered wood is 14mm. 

Currently the plan is to pour 55mm of screed, leaving 11mm of wiggle room for any differences in height & gluing. Would 60mm be a better depth for the screed to avoid too much of a gap at the thresholds? I'm nervous about only leave 6mm of wiggle room for the flooring.

 

Any advice appreciated!

[Mr Punter]

If the flooring is stuck down the glue is less than 2mm.

 

Do you need any allowance for door mats?

[catrionag]

1 minute ago, Mr Punter said:

If the flooring is stuck down the glue is less than 2mm.

 

Do you need any allowance for door mats?

Thanks! I'd assumed the allowance for door mats would be the height of the doorframe itself (10mm or so I think). 

[JohnMo]

You don't want it to low, do you need to include accessible door thresholds?

[catrionag]

Just now, JohnMo said:

You don't want it to low, do you need to include accessible door thresholds?

That's what I'm slightly worried about - if we end up with it too low, with a gap over 10mm below the accessible door threshold! The more I'm thinking about it, the more it seems sensible to go with the 60mm screed. I just wanted a sanity check that 6mm is plenty of wiggle room.

[Thorfun]

Is there any kind of matting or underlay needed for engineered wood flooring?

[catrionag]

12 hours ago, Thorfun said:

Is there any kind of matting or underlay needed for engineered wood flooring?

 

No we're gluing it directly down onto the screed in order to get maximum heat from the UFH!