Dehumidifier Installation
in Coquitlam, BC
Coquitlam's topography is dramatically varied — from the near-flat Como Lake area and the Burquitlam lowlands to the steep slopes of Burke Mountain, where residential development has pushed into terrain that was forestland a generation ago. This range means crawlspace conditions are highly site-specific. Burke Mountain homes on new lots sometimes deal with cut-and-fill grading that has disrupted natural drainage patterns, directing water toward foundation walls in ways that were not anticipated during construction. Lower Coquitlam properties in areas like Burquitlam and Maillardville deal with the older housing stock that characterizes the lower Fraser Valley — vented crawlspaces, original fibreglass insulation, and moisture damage that has accumulated over decades.
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.
Why Choose Us in Coquitlam?
- Experience with Coquitlam's specific soil and drainage conditions
- Custom-designed systems — not one-size-fits-all packages
- Fully licensed, insured, and WCB-covered technicians
- Written report with photos after every inspection
- Workmanship guarantee on all completed work
Request Service in Coquitlam
About Coquitlam — What We See Here
Maillardville in particular has some of Coquitlam's oldest residential housing — a French-Canadian community established in the early 20th century, with some properties dating back to the 1910s and 1920s. Crawlspaces in homes of this age have often had multiple rounds of insulation and vapor barrier work over the decades, and we frequently find layers of materials installed by successive owners, some of which have contributed to rather than solved the moisture problems. Proper remediation in these cases requires understanding what is actually there before proceeding with a new approach.
The Austin Heights and Coquitlam Centre areas represent mid-century development — 1950s through 1970s — where many homes have crawlspace foundations and the typical moisture and structural issues of that era. We see a high proportion of cases here where the original fibreglass insulation has completely failed and mold on the subfloor underside is well-established. Encapsulation combined with mold remediation and insulation replacement is the standard scope for these properties.