Exterior Wall Sheathing Installation
Wall sheathing has gotten complicated with all the material options, fastening requirements, and weather barrier concerns flying around. As someone who has installed sheathing on every project type, I learned everything there is to know about proper installation. Today, I will share it all with you.
Sheathing Materials
Probably should have led with this section, honestly—common options include OSB, plywood, and rigid foam.
Installation Steps
- Start at corner, align with framing
- Install vertically with staggered joints
- Leave 1/8″ gaps for expansion
- Nail per manufacturer and code requirements
Fastening Schedule
- 6″ on center at edges
- 12″ on center in field
- Nails 3/8″ from edges minimum
- Use correct nail length for penetration
Weather Protection
- Install housewrap over sheathing
- Flash all openings properly
- Seal penetrations
- Maintain air gap behind cladding
