Our SP-site is used as a part of another non-SP site. The layout should look the same on both the SP-site and the non-SP site.
In the past, we have copy/pasted the html from the header and footer of the external site into the SharePoint master page. A preferred solution would be to include static html pages that SP can render as header and footer. That way, header and footer only need to be updated in one place. Is this possible?