When mudding drywall, apply joint compound to corners to join sections of drywall. Push drywall mudding into wall cracks using the tips in this free video on home remodeling from a professional building contractor. Expert: Trigve Hagen Bio: Trigve Hagen is a licensed contractor working in the Los Angeles area specializing in residential home improvement. He was been working in construction for over seven years. Filmmaker: Nili Nathan