Training Adult Dog

What is a good technique for training an adult dog house?
We adopted a lab mix years 4 months ago. The refuge told us was the house-trained, but it is not. A big problem is that we plan to walk or do not, then went to the bathroom in the house almost immediately after our return.
that even a puppy, if she goes home, put him in confusion and say NO! then take it out, if she comes out street, much love, girls and good business, make a big deal of it! is better if you get caught in the act and take off in the end and then, when he finished apart from what above, they do feel good about it! but must be consistent! even if you go at night while you sleep, make a box, you can turn around and lay down, but not sufficient space in which the pot can go and not avoid it, dogs do not go to the bathroom in a place where it can not avoid laying
Meet, Greet, Repeat SIRIUS Adult Dog Training