How do you install rigid insulation to the outside of a brick house"

Updated: Aug. 27, 2020

There is no space between bricks so we would like to add R20 to the exterior of the house also providing a vapour barrier. A previous owner had taking down the lath and plaster and installed two by twos with a bit of fiberglass insulation but no effective vapour barrier.

Any suggestions would be appreciated.

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