Tiling Substance



To tile a substance texture you will need to add a Texture Coordinate node and multiply this by scalar parameter. 

https://docs.unrealengine.com/latest/INT/Engine/Rendering/Materials/ExpressionReference/Coordinates/#texturecoordinate

To create parameters for both the U and V tile, you can use an Append Vector and multiply this by the TexCoord. This allows you to independently set the U and V tile amounts.