Laying Laminate on two Levelled Floor Help, advice, information, answers and tips on all types of flooring from laminate and carpet to timber and vinyl

[Sarahfretwell]

Apologies if this has been asked - I've recently had a wall knocked through and am trying to lay laminate in the room (wooden sub floor) and finding that the middle of the room where the wall was the laminate is bowing in the middle and uneven, both rooms individually are level as much as I can gather from the beginning of laying being fine, but one room slightly higher than the other. Do I need to lay Plywood over both rooms or is there a better/easier option? Any help really appreciated!