Crawlspace Insulation
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.
The majority of homes in Surrey and the surrounding communities built before 2000 have fiberglass batt insulation installed between the floor joists in the crawlspace. When this insulation was new and dry, it provided reasonable thermal resistance. The problem is that fiberglass batts installed in a vented crawlspace environment in a high-rainfall climate like ours rarely stay dry. They absorb ambient moisture, sag out of their cavities, and gradually collapse onto the ground. Wet fiberglass insulation has essentially zero R-value, adds weight that can pull down on vapor barriers or staples, and provides a hospitable nesting environment for rodents.
For crawlspaces that are not being fully encapsulated, we install new unfaced fiberglass batts or mineral wool between the joists, but only after addressing the moisture conditions that destroyed the previous insulation. Installing fresh batts into a still-damp crawlspace environment means you'll be back in the same situation within a few years. Proper sequencing matters: drainage, vapor barrier, then insulation.
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.