Can I insulate my house from the outside?

Question

I will be replacing my sinding in the fall and plan on also replacing the "brown board" with OXB sheathing. My house currently has R11 inslulation and I was wandering if I can replace the current insulation with r13-r15 from the outside of the house. I thought as long as I face the vapor barrier toward the drywall I should be ok. I also plan on using insulated vinyl siding for my project.

Answer 1

While it is possible to do if you are planning to use fiberglass batts you need a deeper stud cavity for R-15.

Answer 2

You don't want a sealed area between two vapor barriers.

it can result in rotting your walls.

There are special exterior insulation products that will

serve your requirements. (Glassfoam etc,)

Get local advice.