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. After a tour of the master bath and new second-floor common areas, homeowner Terry Maitland and the lead abatement contractor discuss how the old house's woodwork will be treated during the upcoming deleading process. Our master carpenter warns Terry that the trick will be removing the old windows carefully so as to minimize damage to the interior plaster and exterior siding. Richard Trethewey investigates an old water well discovered on the property - with a proper pump it could supply irrigation water for the yard. Finally, kitchen and bath designer G