OSB On Interior Walls

Interior Surfaces
Hello, I've got a quick question, hoping you may have some contacts or resourses to share with me.
I just bought a house.  I had my realtor, and the realtor that was selling the house also was the owner.  The other realtor/owner was a pain all the way through the process but we got it done.  Now after being there not even a month I found out that the realtor/owner had some remodel work done on the home.  All four walls in the living room and the kitchen are not sheet rock, she had OSB waffer board(roof decking)  put on the walls and sheet rock mud over the entire wall then paint.  So now the sheet rock mud and paint are falling off of the walls.  The realtor/owner is not very cooperative and offered five hundred dollars to fix the problem (since she'd have to pay at least that much if i were to take her to small claims court), which would be enough to maybe cover the materials. 
What can I do or who can I contact about this?  Thank you for your time.



Hello Issac,

The use of OSB for interior wall surfaces is a non-standard practice and maybe in violation of some building codes. Installing a plaster surface onto OSB is difficult and usually requires some special adhesives and techniques in order to function. For exampe, it might require the application of a mesh on all the surfaces in order to compensate for the natural movement in the wood.

As you have described it, the failure of the plaster surfaces shows that this interior wall surface was installed in a sub-standard manner - does not meet minimum practices of the trades. It has failed preternaturally and partial repairs are unlikely to produce a lasting result. It maybe possible to remove all of the plaster material (drywall mud or whatever) clean the OSB surface, apply an adhesive primer/base and then apply a new plaster surface. The cost of such repairs are most likely going to be much higher than the removal of the OSB and the installation of a drywall surface. It might be possible to leave the OSB on the walls in areas of cabinets etc. but even that will depend upon applicable codes.<