Condensation Concern with Intello Membrane in Middle of Wall
We’re renovating a very old house in northwest MA that currently has no insulation. Planning to put recycled rigid foam in real 2×4 stud bays. Contractor proposed putting Intello membrane over studs to air seal, then building 2×3 wall with offset studs to thermally break and filling with batt insulation, which would be easy to put around electrical wiring. Question: would having air barrier in middle of wall allow moisture in the winter to go through the 2×3 wall and condense on the exterior wall where the membrane is located, thinking those exterior studs would be especially cold. Here’s the design from exterior inward:
2×4 wall filled with rigid foam (sealed with can foam)
2×3 wall with fiberglass batt insulation
The purpose for the Intello in middle is to make it easier to air seal and not worry about penetrations for electric boxes, etc.
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