Plot: Redwood clapboards - finger-jointed and preprimed - start to go on the addition; our general contractor shows us a trick with a ""story pole,"" which helps him space the clapboards evenly across a given field. Our master carpenter explains the challenges of waterproofing and venting the shallow pitch of the addition's shed roof, while in the master suite, we see Dickie Silva screwing down the floor deck with an automatic-feed screw gun