I am currently using
<?php if ( is_home() ) :
get_header( 'home' );
endif;
?>
To call 'header-home.php' on the homepage only.
I also want to call 'header-fullwidth.php' on our full width posts.
This is one of our full width posts: http://www.sickchirpse.com/photos-vatnajokull-glacier/
This is a normal post (it has a sidebar): http://www.sickchirpse.com/how-survive-european-squat-house-berlin/
What can I add to achieve this?