Add H1 tag to home only

Hi there,

I guess my php knowledge is not sufficient enough to solve the following issue. Currently, I am doing some SEO improvements to my blog. The theme I use does not have a h1 heading for the home page. Thus, I am trying to add this to the home page only. Actually I either want to make use of a h1 for the site logo and give it a text (the blog name).
I guess it’s not difficult. However, I stumple upon the themes functionality that it delivers both a regular and a retina logo.

Does any one know a solution?

Thank you!

Cheers,
Christian

Here is the current header.php code:

<a title="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" id="custom_logo" class="logo_wrapper" href="<?php echo home_url(); ?>">
							<img src="<?php echo $pp_retina_logo; ?>" alt="" width="<?php echo $pp_retina_logo_width; ?>" height="<?php echo $pp_retina_logo_height; ?>"/>
						</a>
						<?php
						}
						else //if not retina logo
						{
					?>
						<a title="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" id="custom_logo" class="logo_wrapper" href="<?php echo home_url(); ?>">
							<img src="<?php echo $pp_logo?>" alt=""/>
						</a>
					<?php
						}
					?>