Containment is the barrier between the work being carried out and the rest of the property, and it’s a standard part of any remediation job where there’s a risk of cross-contamination. A full enclosure is built around the affected area using sheeting and sealed access points, physically separating it from the spaces around it.

Negative air pressure is then established inside the enclosure using HEPA-filtered equipment, which draws air out of the containment zone and filters it before releasing it — meaning any air movement is inward, into the contained space, rather than outward into the rest of the property. This is what stops spores disturbed during removal work from drifting into adjoining rooms, hallways, or ventilation systems.

For more complex sites — high-level ceiling voids, awkward access points, or work carried out on scaffolding — containment is built to suit the specific site conditions rather than a one-size-fits-all setup, which is why our team scopes this as part of the initial survey rather than treating it as an afterthought once work has started.

This service isn’t typically instructed on its own — it’s built into MIR, standard remediation, and commercial jobs wherever there’s a meaningful risk of spreading contamination. But it’s worth understanding as a distinct part of the process, because it’s one of the main things separating proper remediation from a quick clean-and-spray job.