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It may be necessary to remove electrical and plumbing to sanddown an area properly. Do what it takes to do the job RIGHT! No Short-cuts. | 
Spraying biocide doesn't require 6 hands :), but make sure that you spray in, around and behind everything, including up into the wall cavity. |
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Some problems may be easier to attack from the exterior. This is a corner bath requiring the contractor to replace the rotten corner posts. | 
A 2nd story tub infestation required the floor to be replaced and reinforced. New wood in the walls and several new studs was needed. |
Once the mold has been cleaned from the structure, it's time to address the Indoor Air Quality. Dehumidifiers control moisture. | 
If you have a high relative humidity in a room or area (55% or higher), then you should strongly consider a dehumidifier. |
Negative air machine are turned on and vented to atmosphere during tear out and remediation to control dust and air-born mold. | 
Once the job is ready for final clearance, the negative air machines run continuously to scrub the air with 2 or 3 stage Hepa / Allergen filters. |
