washington state diclosure laws

[Maclaver]

I bought a house in washington state, 09/01. My floor is out of level and needs repair. The buyers knew the problem existed, and I have proof. The inspector missed the problem. What recourse do I have. Will the sellers be responsible for the costs.

 

[HomeGuru]

I bought a house in washington state, 09/01. My floor is out of level and needs repair. The buyers knew the problem existed, and I have proof. The inspector missed the problem. What recourse do I have. Will the sellers be responsible for the costs.

My response: confusing post.
Who are the parties?