A coil matrasses of any type have to be placed on a solid grate MASIV with openings not bigger than 6 centimetres. They cannot be adjustable.
Foam mattresses less then 18 centimetres in height require a flexible base.
LAMELA grate can be adjustable if it does not contain a coconut core mattress.
The foam mattresses of 18 centimetres in height or higher can be placed on any kind of base.
A combination of different grates in the same bed is possible. However, it is necessary to unify the height. (Each grid has a standard height). Otherwise the new combination requires a change of the bed construction or atypical solution to the grate construction at extra cost.