Eps board dimensionally variable?

[gravelrash]

Just putting foundations EPS sheet down and the boards seem to have quite a large tolerance dimensionally, leaving gaps between boards up to 5/6mm. Is this normal for EPS? I have been gap filling but cant get into smaller gaps, but 3 layers going down with dpm between 2nd and third. 

 Probably been covered before but cant find anything in the search.

[SuperJohnG]

My insulated foundation from KORE had some variations between outer lengths and heights where they were cut but in building it I just filled with foam and cut the final block. 

 

The inner section  which was all boards I staggered joins as I had three layers but those ones were pretty decent tolerances. As long as you stick to the overall dimensions you require it'll be fine. 

[gravelrash]

do you have to foam all the small gaps? ie 2-3mm

[SuperJohnG]

2 hours ago, gravelrash said:

do you have to foam all the small gaps? ie 2-3mm

Is it an insulated foundation?  If so I didnt. I filled large gaps, but small ones are fine.