Dehumidifier Installation
in Bridgeview, BC

Bridgeview is a mixed residential and light-industrial neighbourhood in north Surrey, sitting adjacent to the Alex Fraser Bridge approach and close to the Fraser River. The area occupies low-lying ground with a water table profile similar to Newton and parts of Richmond — close to grade through the wet season and subject to periodic flooding during major rain events or high freshet years. Many of the residential homes in Bridgeview are older properties on larger lots, some dating from the 1950s and 1960s, with crawlspaces that have had decades of exposure to these demanding conditions.

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.