LISTEN...

Any air barrier is going to have tough spots and these areas need careful attention.

Remember: An air barrier should be continuous from basement slab to the the roof!

The older the building, the less likely that there's a proper air barrier. The weakest points are going to be:

• Around floor joists and headers (rim joist)
• Windows and doors
• Outlets and fixtures for electrical, plumbing
• Ceiling and wall junction - drywall cracks from truss uplift
• Attic hatches
• Ventilation for appliances and HVAC

Choose the most appropriate material for improving the air barrier:

• Sheet roll material (exterior application) for walls and roof
• Caulking for small gaps and cracks
• Low expansion spray foam for larger gaps
• Liquid applied air barrier for hard to cover areas - stone or concrete block foundation.