The function of air flow in the Fort Myers drying process

Whether drying a large scale commercial job or drying the walls between a home garage and the living space; air movement and reduced relative humidity are required.

Base trim should be removed to accomplish fast and complete drying of walls in homes. Newer homes also have drywall hung ¾ inch off the floor to provide an air space so that:

- In a small Fort Myers flood the drywall will not wet unless the water wicks through the base trim. When that trim is plastic the drywall is protected from indirect wicking. When the base trim is wood it takes time to wick up to the drywall.

- When drying wet drywall the ¾ inch air space allows fans to circulate dehumidified air to the back side of the drywall for drying.

When there is no opening to get air movement to the back of the drywall or the Fort Myers wet materials are overhead; an access hole should be cut in the drywall to allow air movement to the back of Fort Myers wet materials. In situations where the walls cannot be cut, such as tiled walls of faux painting, small holes can be drilled in the wall where they will be covered by the base trim when it is reinstalled. Specialty equipment called “Inject a Dry” uses a manifold fed by air movers and connects to many flexible tubes to push dry air to the back of the Fort Myers wet material surface.

The movement of air across a Fort Myers wet surface creates a “static” pressure at the material surface. This process speeds up the evaporation process and literally pulls the Fort Myers moisture out of wet material. The fan or air mover should be placed at a 15 to 45 degree angle from the wall. The faster the air movement across the surface and the dryer the air the faster the evaporation.

Whether drying a single Fort Myers room or a larger space, a drying envelope must be set up. This is a separation of the Fort Myers wet areas from dry non affected or outside areas to stabilize and control the temperature and humidity for improved drying conditions. A drying envelope can be as simple as 6 mil poly sealing a door way but it should be a small as possible. The dehumidifier will need to process all the air in the envelope to reduce the humidity. Once the Fort Myers moisture is pulled out of the wet materials through evaporation into the air the saturated air in the drying envelope is cycled through an LGR (Low Grain Refrigerant) dehumidifier to keep the relative humidity in the drying envelop as low as possible. This LGR dehumidifier can remove up to 62 pints of Fort Myers water from the air in 24 hours.

Continue reading →