"Understanding Your Home" by Building Inspector Mark Visser
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Fruit cellar.
The door should be treated as an exterior door, as it is one. The door and door frame should be insulated. It also needs door stops and weatherstripping. Screened vents to the exterior will help to control humidity levels during the summer. Vents should be closed during the winter.






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Crawl Space and Fruit Cellar
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Unheated crawl space
. Insulate water pipes, heating and cooling ducts and ceiling above (main floor). Floors insulated with glass fibre batts should have a vapour barrier on the heated side of the floor.
The crawl space should be well ventilated to prevent moisture and/or condensation from entering the floor structure.
Heated crawl space. No ventilation is required if the crawl space opens into a full basement. Exposed dirt floors should be covered with a vapour barrier (see below).
If there is a moisture problem, vents should be installed for proper ventilation. These vents should be closed, sealed and insulated during the heating season.
Heat is radiated from uninsulated water pipes and heating ducts. Exterior walls and joist header space should be insulated and covered with a vapour barrier to prevent heat loss in this area.
Vapour barrier. Moisture, directly or indirectly, causes more problems in buildings than any other single cause. Moisture can enter the house in many ways. An exposed dirt floor in the craw space could be the cause for high moisture levels in the house.
Exposed dirt floors should have a 6 mil (0.15 mm) polyethylene cover to trap this moisture. Joints should overlap by 6" (150 mm) and be weighted down. If there is any traffic in the crawl space, 2" (50 mm) of sand should be installed to protect the barrier.
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