Sewer Roots in Seattle. We were called out to a local Seattle residence where they had a complete backup of their sewer lines. The roots in their sewer pipe caused the entire backup as nothing could flow through. This is a great example of the damage roots are capable of– do not let this happen to you! The homeowner had the roots completely removed and then called Perma-Liner for a local Seattle contractor to install a Perma-Lateral liner in the old pipe. The Perma-Lateral liner is impenetrable to roots, adding another 50+ years onto the life of the pipe!