Bonded down Bamboo, how flat a floor?

[Tin Soldier]

Morning comrades,

 

I'm looking to get my concrete slab ready for bonding down bamboo click flooring.

My slab is not the most even, and I've already identified a dip of circa 20mm in one corner of the open plan space.

I've bought some self levelling to sort this out (setcrete deepbase)

 

my question really relates to minor imperfections/unevenness off the 3-6mm variety.

 

I want the floor to look good, but I don't want to spend unnecessary effort trying to get it flawlessly flat if I don't need to.

 

do I need to even these out? or will the adhesive BONA R844 help out?

 

cheers

 

Scott

[MikeGrahamT21]

Ive just had some samples of bamboo flooring through the post, and is say its probably a product which won't bend easily like laminate may to fit the unevenness. Not sure myself just how perfect it needs to be for a good finish.

[Jeremy Harris]

I bonded down bamboo to both a primed power floated concrete slab and an OSB floor.  I found that just laying a good thickness of the Sikabond 95 adhesive on the floor, as if laying tiles, then laying the bamboo and just walking over it, resulted in a pretty flat floor, with no creaks.  The adhesive will take out up to about 3mm of unevenness OK, but it is costly!