Change separating space on Home

Hi !
We are using the add-ons for our site, which our great !
However I'm having trouble with our home page.
I'd like the homepage to be full-width, but there's a bar between the main navigation and the container, which only dissapears when I set the separating space on "0". However, I'd like to have separating space for our blog and sidebars.
Is there a way to change the separating space on the homepage ? Can't seem to figure this one out.
( I'm no wordpress expert :-) )
Our site ( under construction ) is http://www.floorsonline.be
Thanks !