Is it ok to install brick veneer directly to interior of a poured concrete foundation wall, or is there any additional preparation required?
It won't hurt anything, but won't help you if your basement has problems. For example, if your basement is damp and cold, it will remain damp and cold after installation of the brick veneer. If this is the case, then I would recommend first insulating the walls with rigid insulation boards. It'll make your basement much more comfortable, cost you probably under $1,500, and there'll never be a better time than now!