Dehumidifier Installation
in Ladner, BC

Ladner is the historic heart of Delta municipality, a small town centre surrounded by the flat Fraser River delta farmland that characterizes much of this part of the Lower Mainland. The residential areas of Ladner proper sit on some of the most challenging hydrology in the region — flat ground, high water tables, fine-grained delta soils with poor drainage, and proximity to the river channels and sloughs that lace through the delta. Managing crawlspace moisture in Ladner is as much about mechanical water removal as it is about vapour barriers.

Humidity management is the operational heart of any crawlspace encapsulation system. Sealing the crawlspace envelope stops the major sources of moisture entry, but the residual humidity in the sealed space — from the soil itself, from diffusion through concrete stem walls, and from any minor air leakage — needs somewhere to go. In most Lower Mainland crawlspaces, a properly sized commercial dehumidifier running continuously is the right answer. The target is to maintain relative humidity at or below 50 to 55 percent year-round, which is the threshold at which mold growth and wood-boring insect activity become effectively impossible.

Proper sizing is critical. An undersized dehumidifier will run continuously without reaching the setpoint humidity level, eventually burning out its compressor. An oversized unit is not a problem in terms of dehumidification, but it costs more upfront and uses more energy than necessary. We calculate required capacity based on crawlspace square footage, current moisture load (as measured during inspection), the vapor barrier coverage and sealing quality, and the seasonal humidity patterns typical for the specific location.