Hi there. I'm now going to call myself a noobie DIYer, since after the last few people we've hired, I'm planning on doing any and everything I can around the house I can :( My problem started with being a rent-to-own tenant, and having my father (not a fan of spending money) as a landlord...

Is there an accepted method to firring old walls (where correction is not feasible) prior to drywall? What to use? The taper varies from 0" to 7/8" over 74" (ht.). Something that will not split? Thank you!!