Window insulation and mold
We need to leave our house unoccupied this winter and I have a concern about heating and mold. Here are the details:
– 1275 sq ft super insulated house with HRV
– triple pane windows with rollshutters on the outside
– very cold, dry climate (northern Alberta). -40 temps not uncommon.
– we normally heat with a wood stove but need to use our back up electrical heat system while the house is vacant
– Plan to set thermostat at 5 or 7 degrees C (41 – 45 F)
– electricity is very, very expensive here
We plan to save on the potential catastophic cost of electric heat by making window inserts from rigid styrofoam insulation (R10). We have made four inserts so far and have tested them overnight while the building is occupied and fully heated. Outdoor temps at night are now around freezing. We notice a LOT of condensation builds up between the glass and the insulation after just one night. My questions are:
– Are we risking mold growth around our windows with this plan?
– Is there anyway to prevent or mitigate mold growth?
– If we go ahead, should we keep the HRV running or turn it off for the winter?
Many thanks for your input.
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