[header] How to hang voile and curtains together [title] Purchase a double curtain rod kit from a home improvement store. [step] These kits come with 2 curtain rods and curtain rod holders with brackets to hang the second curtain. A double curtain rod will allow the curtains and voile to hang at the same length without having to measure multiple holders. 
[substeps] Choose decorative rods if you want the rods to add flair to the overall window treatment. If you don't want the rods showing, choose concealed rods.