Mold Remediation
We use industrial-grade equipment and safe antimicrobial treatments to kill mold at the source and prevent it from ever returning.
Mold in a crawlspace is far more common in the Lower Mainland than most homeowners realize. The combination of high annual rainfall, cool soil temperatures, and the older vented crawlspace designs found throughout Surrey and Langley creates near-ideal conditions for mold spore germination. Once wood framing reaches sustained moisture content above about 19 percent, various mold species — including Stachybotrys (black mold), Cladosporium, and Penicillium — can establish colonies on joists and subfloor sheathing within days. Left unaddressed, those colonies degrade structural wood, release spores into the living space above, and contribute to persistent musty odors and elevated indoor VOC levels.
Our remediation process starts with containment. Technicians establish negative air pressure in the crawlspace using HEPA-filtered air scrubbers to prevent spores from migrating into the home during the removal process. Heavily colonized wood is wire-brushed or sanded, and where rot has progressed to the point that structural fibers are compromised, we remove and replace the affected sections. After mechanical removal, we apply an EPA-registered antimicrobial encapsulant to all affected framing — not just the visibly moldy areas, but the surrounding wood as well, since spore contamination spreads beyond what the eye can detect.
One point that often surprises homeowners: mold does not go away on its own, and painting over it or applying bleach to crawlspace framing does not constitute proper remediation. Bleach is largely ineffective on porous wood because its active chlorine dissipates before penetrating the surface, leaving the root structure of the mold intact. Proper remediation requires physical removal of the colonized material combined with a professional-grade biocide or encapsulant rated for crawlspace use.
Following remediation, we address the moisture source that allowed mold to take hold in the first place. This is the critical step that separates a lasting fix from a temporary one. Without correcting the underlying drainage, ventilation, or vapor barrier deficiency, mold will return within a season or two. In most cases, mold remediation is paired with crawlspace encapsulation, improved drainage, or dehumidifier installation — whichever combination is appropriate for the specific conditions we find.
Signs that your crawlspace may have an active mold problem include a persistent musty or earthy smell in the home (especially noticeable when the HVAC system runs), unexplained allergy-like symptoms in occupants, visible dark staining on joists when you look into the crawlspace with a flashlight, or a professional inspection report flagging elevated mold spore counts. If you are purchasing a home and the inspection turns up mold in the crawlspace, it is worth having a remediation specialist — not just a general contractor — assess the scope before finalizing the sale.