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The ninety-year-old slate roof could not be saved, so roofing contractor Sean Green and his crew strip off the old slate, and lay down new asphalt the proper way. General contractor Tom Silva shows host Kevin O'Connor how his crew is hanging 5/8 fire-rated wallboard on the ceiling with the help of a handy wallboard hanger. In the second floor bathroom, plumbing and heating expert Richard Trethewey installs a new custom copper shower pan and drain . In the basement, master electrician Allen Gallant shows homeowner Chris Flynn the new, updated service panels and the new external whole house surge suppression system that will protect all the household appliances and electronics from power surges and lightening strikes. Kevin lends Tom and Richard a hand getting the cast iron tub into homeowner Liz Bagley's first floor bathroom.