How soon after paving should I backfill the edge of the asphalt? A How soon after paving should I backfill the edge of the asphalt? Backfill edge of asphalt within about two weeks after paving to support the asphalt edge. Leave a Reply Cancel replyCommentEnter your name or username to comment Enter your email address to comment Enter your website URL (optional) Save my name, email, and website in this browser for the next time I comment. Notify me of new posts by email.