Different levels of underlay in same room

[notsohandyandy]

We're about to take up approx. half (25 sq m) our living room carpet to replace the felt underlay (6mm thick?) with Acoustilay (heavy rubber-backed sound insulating underlay - 15mm thick). We can't do the whole room for various reasons. Question: where the new underlay abuts the old felt underlay what can we do to make the difference in height as unobtrusive as possible?

We'll be re-laying the existing sisal type carpet ontop afterwards. If anyone has any experience of this type of situation and any useful advice we'd much appreciate it - we've had no luck persuading carpet-fitters that this is a job they would enjoy...

Thank you

 

[breezer]

well if its half the room why not put the half you remove on the half you leave?

or you could put up a notice "mind the step"

 

[notsohandyandy]

well if its half the room why not put the half you remove on the half you leave?

Because we can't remove the carpet or underlay in the other half of the room - because of sliding doors, fitted cupboards, freezer cabinet etc. even temporarily