When walls hold contamination
Drywall's paper facing and gypsum core absorb liquids, and wall and ceiling cavities often contain insulation that soaks up fluids and odors. Contamination reaches walls in several ways:
- Blood spatter and fluids that soaked into drywall or ran into cavities through outlets and gaps
- Decomposition fluids wicking up from the floor into walls
- Sewage and floodwater saturating the lower portion of walls
- Heavy smoke and drug residue in porous surfaces
- Animal urine, droppings and nests in walls and ceiling cavities
Painted drywall with surface contamination can sometimes be cleaned. Saturated drywall and insulation generally have to be removed.
How the work is done
- Assess how far contamination reached, using moisture readings, visual inspection and, where needed, small inspection openings.
- Set up containment to keep dust and debris from spreading to clean areas.
- Cut drywall at a measured line above contamination, with a margin, and remove insulation in affected bays.
- Bag and dispose of materials appropriately for the type of contamination.
- Clean and disinfect studs, plates and the cavity, and treat odor.
- Seal framing where staining or odor remains.
- Dry framing before rebuilding where water was involved.
- Document measurements and photos.
Hidden hazards
Older homes may have asbestos in joint compound or lead in paint. Testing is arranged before suspect materials are disturbed, and abatement is handled by licensed contractors.
Electrical and plumbing
Wiring and plumbing in walls are protected, and qualified trades handle any repairs or inspections.
Common questions
Do you replace the drywall?
We remove and decontaminate. Your contractor installs new drywall.
How high will you cut?
It depends on how far contamination reached. For floodwater, cuts are typically made above the water line.
Can the insulation be reused?
Not if it's contaminated. It's removed and replaced.