Can you lay a new sub floor over an existing one?

Do you mean the base board? It is better if you can remove the base board then reattach on top of the new floor. It will give you the best look. If you butt the new wood up against the base boards...

It depends on the condition, material and surface of the laminate. A linolium floor, for example, is soft composition with a textured surface. This makes a horrible foundation for ceramic tile,...

I've done it many times. Make sure the original layer of wood is nailed tightly to the subfloor so that it doesn't squeak. Ideally you would go perpindicular to the original flooring, especially if...

You can; although you may want to use either tar paper or something else to reduce "Squeaks". Remember also that installing a new floor over the existing one is going to raise the new floor up by up...

You can add a new story to your home once the story below it is complete. You can't make a second floor until you have all of your rooms on the first floor. Stairs are jsut to look cool in your...