Perma-Lateral Lining Boston. We’ve been asked by many people in Boston how to come up with exact measurements – no matter what the job is – on Perma-Lateral lining installations. Perma-Liner has created a step by step installation form that gives instructions on how to get exact measurements on the materials. Perma-Lateral lining is the alternative to digging and replacing sewer branch lines from residential and commercial properties around Boston. If you live in Boston and would like to learn more about Perma-Lateral lining or would like to schedule a live demonstration, call us any time!