"Is the siding supposed to move like that?" -- Do you know how to answer this question? Great insight from our friends at Peak Home Exteriors. Doing it right the first time saves time and money in the long run for an end result that lasts 👊 ”The short answer—yes [it's supposed to move like that]. But just in case you were wondering why... Vinyl, PVC and engineered wood siding materials all do one common thing and that is expand, and contract in different temps. When the temperature is warmer li