How can i get Transparent Overlay only on the home page?
Possible Answers to Your Question:
In the current version of Layers, if you choose the Transparent Overlay, it will only be applied to Layers pages with a slider in the top position or which have a title banner. All other pages will show a normal header using the background color you set under Site Settings > Colors, which includes the Contact page preset.
So if your header color choice is gray, it will look like the second screenshot.