To square-up lumber on the joiner is to do a straight cut on wood with accuracy. Make perfect cuts in wood for your projects with help from a professional remodeler in this free video. Expert: Chris Palmer Bio: Chris Palmer brings his experience as a residential remodeler to a wide range of home improvement projects, including bathrooms, kitchens, carpentry and cabinet making. Filmmaker: John Baldino Series Description: There are many tools to help you get your home remodel done quickly. Learn the basic tools available for you from a professional remodeler in this free video.