Architectural details should shed rainwater away from the foundation, doors, windows and walls. This article focuses on shedding rainwater by roof design and construction with references to humidity control and plumbing leaks. See the related articles for tips on controlling moisture and decay by design and construction of walls and foundations.
Air and humidity control: Air infiltration is a major source of moisture migration into a home, so effective air sealing is an important part of moisture control. Indoor humidity control and exhausting wet air are key strategies to prevent condensation -- as long as that wet air is not deposited under the house or inside the attic.
Plumbing: Although not a major risk in this climate, try to avoid locating plumbing within exterior insulated walls. Holes in exterior walls, drafts, cold pipes and insulation voids can add up to cause condensation. Burst pipes could occur in the occasional severe cold snap. Likewise, vented attics are a risky location for a water heater and plumbing. If they freeze, a lot more than a floor gets wet. Also, protect your home from accidental flooding from worn washing machine hoses and hot water tanks with a pan or floor drain and durable stainless steel hoses.