Rooftops Campaign is a fan-made singleplayer campaign mod for Call of Duty 4. It includes a brand new storyline, cool new innovative scripted sequences, intense gunfights, and fun mission concepts.
I manage to get an awesome rooftop tile texture.
O combined it with a rooftop edge tile model and it looks very nice. The sizes may not be very precise but I think it will do. It won't be very noticeable from under Rooftops.