WRB & Flashing
Stucco is likely to last significantly longer than the decking, so make it easy to replace the decking without disrupting the stucco.
Felt, furring strips, and flashing keeps rain out of the walls
Walls that can drain and dry last a lot longer than walls that stay wet. An air gap between the siding and sheathing lets both dry independently. Furring strips are one way to make that air gap.
Integrate the window with the house wrap, and the house wrap with the wall for an airtight, watertight window installation
Insects can get into the little parts of a wall and muck up water and air movement details
How to detail the foam at corners and connections when tightening the energy efficiency of an old house
Flashing a humpy old roof valley requires a little give and take, and a backup plan
Dealing with dips and making clean overlaps
Warm and dry basement living space begins with keeping the basement dry—duh. All moisture from outside must be directed away from the interior walls and slab.
Covering the roof of an old house with a blanket of insulation makes the house more comfortable and it cuts energy use.
The second layer of foam is the air barrier and drainage plane.