Dry ice blasting removes mold colonies from wood framing, stucco interiors, and concrete in Sun Valley homes built before 1970. Pellets sublimate on contact, lifting growth without introducing moisture that could restart colonies during the hot, dry summers common in Los Angeles County. Technicians adjust blast pressure for older plaster walls in Shadow Hills and La Tuna Canyon properties where lath can crumble under aggressive media.
After containment with plastic sheathing, the process reaches behind baseboards and into HVAC returns near Hansen Dam Recreation Area homes where seasonal Santa Ana winds push spores through ducts. No water is added, so secondary drying time drops compared with traditional wet methods. Residue is HEPA-vacuumed and surfaces are left ready for inspection or minor repairs.
Edge cases include tight crawl spaces under Sun Valley Park bungalows where access limits pellet flow and requires smaller nozzles. In Pacoima and Burbank border homes, shared walls can allow cross-contamination if neighboring units are not isolated first. All work follows Los Angeles County health guidelines for visible mold greater than ten square feet.
Homeowners should expect the area to remain sealed until post-remediation testing clears the space. Dry ice leaves no chemical film, but any underlying leaks must be fixed before final clearance to prevent recurrence in the warm Mediterranean climate.
Technician insight
In Sun Valley the thing that catches most people out with dry ice blasting mold is older stucco homes where the paper backing on drywall has already delaminated from past roof leaks near La Tuna Canyon. Once you start blasting, whole sections can flake off if you do not pre-test adhesion, and the job turns into a larger patch-out than the homeowner expected.
Shadow Hills Crawl Space Growth
A homeowner noticed musty odor after winter rains. Inspection found mold on joists under a 1960s house near Hansen Dam. Dry ice blasting cleared the growth from the underside of the subfloor without adding moisture. Post-testing cleared the space and the owner sealed the vents to reduce future humidity.
How it works
- 1
Containment Setup
Plastic barriers and negative air machines isolate the work zone in the affected Sun Valley structure.
- 2
Dry Ice Application
Blasting begins at low pressure on visible growth, moving to higher settings only on durable surfaces like concrete slabs.
- 3
Debris Removal
HEPA vacuums collect loosened material while the area stays under negative pressure.
- 4
Clearance Testing
Air and surface samples are taken and sent for lab analysis before barriers come down.
Pricing
Cost depends on square footage treated, access difficulty in older Sun Valley homes, and whether HVAC cleaning is required.