You do not mention whether you wooden wall will be painted or stained wood. Either way, there paint products you can use to properly seal and protect the wood either way. You should visit your local paint store and tell them what you are trying to do and see what products they recommend.

OSB board will do the trick. You need another photo for us to offer a species and finish. Natural finish (clear coat...water based polyurethane finish...NO oil modified) in a low gloss or satin finish on white oak with FLOOD LIGHTS will offer the same "look" as the poor photo. Beyond that, you will need a better photo.

It took me ten years to figure out as an adult why my allergies are non stop when I visit my moms custom home. This morning I figured it out. Pine floors. We eliminated feathers, my seasonal allergies and there are no other triggers apparently in this house. I have to take the max allergy meds per day to be here. Treating the floor did not stop this from.happening to me as my allergies are severe. So heads up guys, people can react to the wood flooring even after its treated

that is what i have added if you can see the pic above.. want some suggestions on partition that i can use between dining and sitting