True or False: Using kiln- or air-dried wood in construction is an expense-efficient method to prevent WDO infestation.

Using kiln- or air-dried wood in construction is indeed considered an expense-efficient method to prevent wood-destroying organism (WDO) infestation. The primary reason for this is that drying the wood significantly reduces its moisture content. WDOs, such as termites and certain fungi, thrive in moist environments. When wood is properly dried, it becomes less attractive to these pests as they generally seek out damp conditions for survival and reproduction.

Additionally, kiln-drying involves heating the wood, which not only lowers its moisture levels but also can kill off any existing pests or eggs that may be present within the wood. Air-drying, while it takes longer and may not eliminate pests as effectively as kiln-drying, still results in lower moisture levels that are less conducive to infestation.

Furthermore, utilizing properly dried wood can lead to long-term cost efficiencies. Although there might be a higher initial investment when opting for kiln-dried wood, the reduced risk of damage from WDOs minimizes future repair and replacement costs, making it a smart investment over time.

In contrast, untreated or high-moisture wood can lead to greater susceptibility to infestations, resulting in more significant expense in terms of property damage and pest control efforts.