insulate garage wall west

[msimerson]

prep walls

• strip walls to plywood
  • [x] remove existing siding
  • [x] remove tar paper
  • [x] remove / pound flat remaining nails
  • [x] remove / disconnect anything else attached to walls
• [x] remove windows
• [x] brush walls to remove dust, debris, and wood particles
• [x] reframe window openings
  • oversize the rough opening:
  • +1/2" vertical for sloped sill (use siding material) to push water out
  • +1.5" for width of plywood extensions (3/4" all around)
• [x] retrofit nail schedule to seismic nailing pattern (#24)
• [x] spray foam fill all cracks and holes
• [x] tape plywood seams

  install foam insulation

• [x] install z-channel flashing
• [x] install insect screening / perfed J-channel / etc. to keep critters out of rain screen
• [x] install foam board, caulk all outer edges, tape all seams
• [x] install 2nd layer, joints offset, caulk all outer edges, tape all seams
• [x] cut out window holes
• [x] install bucks / plywood extensions to outside edge of insulation board
• [x] install furring strips (screw 24" o.c. to 1.5" stud penetration)

[msimerson]

additional fun

• discover rotted sheathing beneath the siding, due to:
  • lack of stem wall
  • later pouring of the garage approach which caused persistent wetting of the siding and sheathing.
• [x] remove rotted plywood and replace with pressure treated plywood and stainless steel screws.
• [x] flash the interface between wall and concrete (grace vycor)
• [x] fill the void with?
  • high density spray foam
  • caulk
  • spray foam (think: backer rod) + caulk