The final roof section of the house is over the new living room addition. It’s unique because it cantilevers out over a balcony. But as Kevin finds out from Tommy, that means installing the rafters takes more care. In the kitchen, the main counter is up against a wall of windows and that causes a problem for venting the drain for the sink. Richard shows Kevin how to install a bow vent to send the pipe down through the basement. Outside, Kevin finds Tommy giving our apprentice Erick a lesson in letting siding breathe. The HVAC crew has been busy with ductwork and today Richard is helping install an air handler for the bedroom wing. A flat roof in New England can turn into a wintery mess if ice and snow slide onto a doorway. Kevin finds Tommy installing cleats on the roof over an entrance. Tom teaches a homeowner how to replace split-level stair treads in his mid-century modern home; Jenn shares some tips about pruners; Richard shortens a gas pipe for a homeowner whose new stove does not fit against the wall because it is getting stuck on the pipe.