Paul Grothouse installs a teak island top in the kitchen, while Jim Snyder installs a solid surface vanity top in the master bath. Designer Christine Tuttle reviews how the vision for the house evolved from fabric, paint and light fixture choices. Tom builds a small but handy electronics nook. Tile contractor Mark Ferrante grouts the pebble tiles on the shower floor. Wallpaper hanger Warren Reeb hangs handmade wallpaper. Norm and Tom install a new front door. In the second half of the hour, on a special episode of ASK THIS OLD HOUSE, the guys make several important improvements. Kevin helps make a home accessible for a homeowner in a wheelchair by modifying a bathroom and several different sets of stairs. Tom and Kevin rebuild a dangerous staircase for a survivor of the Boston Marathon bombing.