Add Before Header and After Footer Widget Areas for Advertising

functions.php

//* Register widget areas
genesis_register_sidebar( array(
	'id'          => 'before-header',
	'name'        => __( 'Before Header', 'themename' ),
	'description' => __( 'This is the before header widget area.', 'themename' ),
) );
genesis_register_sidebar( array(
	'id'          => 'after-footer',
	'name'        => __( 'After Footer', 'themename' ),
	'description' => __( 'This is the after footer section.', 'themename' ),
) );

//* Hook before header widget area above header
add_action( 'genesis_before', 'themename_before_header' );
function themename_before_header() {

	genesis_widget_area( 'before-header', array(
		'before' => '<div class="before-header" class="widget-area"><div class="wrap">',
		'after'  => '</div></div>',
	) );

}

//* Hook after footer widget area below footer
add_action( 'genesis_after', 'themename_after_footer' );
function themename_after_footer() {

	genesis_widget_area( 'after-footer', array(
		'before' => '<div class="after-footer" class="widget-area"><div class="wrap">',
		'after'  => '</div></div>',
	) );

}

style.css

/*
Before Header and After Footer Widgets
---------------------------------------------------------------------------------------------------- */

.before-header,
.after-footer {
	line-height: 1;
	padding: 0 5%;
	text-align: center;
}

.before-header .wrap,
.after-footer .wrap {
	border-bottom: 1px dotted #ddd;
	padding: 20px 0;
}

.before-header p,
.after-footer p {
	line-height: 1.625;
}

.before-header p:last-child,
.after-footer p:last-child {
	margin-bottom: 0;
}