How do you insulate an exterior wall from the outside?

Stuart Seldon
Updated: Feb. 15, 2021

We live in an old frame farmouse. I need to replace the the board and batten on one wall. We want to insulate this wall (currently, there's literally no insulation in it). I spoke to a spray foam contactor, but they were quite expensive. I"m wondering if I remove the board and batten, then remove the old exterior plank wall, if I can just add fiberglass into the wall spaces and is there a product that has some kind of a vapour barrier attached. (We don't want to open the inside of the wall, as it's a newly renovated kitchen!) The total area is about 8' x 40', less a couple of doors and windows.

I'd apprecialte your advice/suggestions!

Thank you!

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