Master electrician Allen Gallant shows Kevin the new LED ribbon strip lights he's using under the cabinets in the kitchen and butler's pantry. Norm and Tom build the new mudroom storage system, focusing on the darkly stained maple top and the rail and stile doors and panels. Richard and Tom review the critical need for ventilation in our modern, super insulated buildings. Wallpaper hanger Mark Pehrson shows Kevin his technique for applying wallpaper to a ceiling in one of the girl's rooms. In another daughter's bedroom, Kevin finds painting contractor Mauro Henrique setting up to paint decorative stripes on an accent wall.