We have a family dog (su) 2 yrs old that is crate trained and some what house trained.

The problem is that when we try to take it out to go to the washroom it pees on the floor. At first we thought the dog might be excited, now it appears that it is on perpose. We have also limited the dog to a couple of rooms in the house, other wise the dog will go to the washroom in other areas of the house.

It is quite frustrating,any suggestions.

You mean your dog goes pee inside as you are taking it out?

Yes that would be great if it were clarified. What I take is that the dog is in the crate, and you open the door and dog goes out and wee's on the floor?
Why don't you pick her up and carry her out?
How long is she crated for? Why was she never fully housebroken?
Has she had a vet check recently?
Dogs don't know the emotion 'spite" so she probably isn't doing it on purpose in the scence that you think. She probably doesn't know that her job is to wait until she gets outside. Are you taking her out on a regualr basis?
She doesn't know she HAS to wait until she goes outside, because she isn't housebrokeN!
You can try to start from square one and housebreak.