English to Serbo-Croat Tech/Engineering Forestry / Wood / Timber

evo objasnjenja za 'underlayment' sa jednog sajta:
'An underlayment can be a panel type like plywood or a cement type like a self leveling underlayment. Underlayment is applied over a subfloor to provide a smooth substrate for the new floor covering. What’s a substrate? That is what we put the floor on. It could be a subfloor, an underlayment, or an existing floor...'

u ovom slucaju radi se o sperploci