Did you only make the color and normal maps? I agree with everything that grimsonfart said, for this it would probably be bettern to make a unique texture. Do you have any other assets you can put beside it for size reference? If you are really married to the idea of a tiling texture, Philip K has a good tutorial about…
Yes i have made only diffuse and normal maps. I have already seen that tutorial but it seems that i haven't applied all goodness from it. I use Photoshop.