Structural Drying >> Applied Structural Drying

Understand the limitations of bleach. While this material is convenient and appropriate as a sanitizer for hard, non-porous items after they have been cleaned, it has distinct drawbacks when cleaning flood-impacted buildings. Application of bleach water can cause corrosion of electrical components and other metal parts of mechanical systems, Applied Structural Drying and can compromise the effectiveness of termite treatments in the soil surrounding the building. 

Its effectiveness at killing bacteria and mold is significantly reduced when it comes in contact with residual dirt. Moldy surfaces should be cleaned first and then disinfected. Residual mold spores should then be removed, Applied Structural Drying since killing them does not reduce their toxicity. Remove mud and gross contamination from floors by shoveling into suitable containers. 

Reduce soil and contaminant levels on surfaces by flushing off with clear water. The fastest and most efficient method to clean Applied Structural Drying and decontaminate materials and surfaces is by using a residential-type pressure washer to apply a cleaner-disinfectant solution to the affected areas (Figure 2). Brushes improve decontamination of floors and some walls by scrubbing solution into affected surfaces. 

Avoid scrubbing drywall and plaster walls at this time because they have become softened by the flooding and moisture Applied Structural Drying and may have their surface damaged by scrubbing. Following the first cleaning, floors and walls should be rinsed with water and the cleaning process redone a second time. 

Squeegees can be used to control or direct spent solution, and wet vacuums can be used to collect spent solution.Figure 2 caption. Using a pressure washer to clean contaminated surfaces. Warning: Failure to allow for adequate drying prior to reconstruction can trap moisture in the building, Applied Structural Drying which can cause structural damage and potential health problems in the future.[End text box]5. 

Dry Out Once the clean process is completed, the building and any remaining contents need to dry. Drying is a naturally occurring process. Over time, Applied Structural Drying all wetted building materials will dry. Drying of structural materials will take an extended period of time to dry to pre-flood conditions. Exterior rooms with excellent ventilation can take 2 to 4 weeks to dry, depending on the temperature and humidity outside. 

Interior rooms, or those with minimal ventilation, can take 4 to 6 weeks or more to dry and are candidates for the use of mechanical drying equipment. The use of fans, dehumidifiers, air conditioners, Applied Structural Drying and/or auxiliary electric heaters will speed drying. Allowing materials to dry naturally will take considerably longer.

Wood framing. The moisture content of wood framing must be checked professionally Applied Structural Drying or with a commercially available moisture meter before refinishing or recovering so that excessive moisture does not become trapped in the materials and cause future problems (Figures 3a and 3b). Dryness of wood framing materials can be determined quantitatively using the table on the right above. 

Wetted materials are presumed dry when their moisture content readings are less than or equal to 15 percent when taken with an intrusive/penetrating moisture meter (Figure 3a). If an intrusive/penetrating moisture meter is not available, Applied Structural Drying a non-intrusive/penetrating moisture meter (Figure 3b) may be used; however, keep in mind that the material moisture results measured from non- intrusive meters may be less accurate than intrusive meters.

Summary of Moisture Reading Results for Wood Framing MaterialsMoisture Reading: >20%, Results: Wet no goodMoisture Reading: 15-20%, Results: Partially dry cautionMoisture Reading: <15%, Results: Dry OK[End table]Figure 3a caption. An Applied Structural Drying intrusive/penetrating moisture meter-recommended for final moisture readings. [end caption]Figure 3b caption. 

A non-intrusive/non-penetrating moisture meter-recommended for initial and interim moisture readings. [end caption]Walls, floors, and other building materials. The moisture content of drywall (gypsum board), plywood floors, Applied Structural Drying and other building materials must also be checked professionally or with a commercially available moisture meter before refinishing or recovering so that excessive moisture does not become trapped in the materials and cause future problems (Figures 3a and 3b). 

Unlike wood framing, Applied Structural Drying the dryness of other building materials must be confirmed qualitatively by comparing readings between like materials in affected areas of the building (at or below flood level) and unaffected areas of the building (a room or upper floor above the flood level, or inside a nearby building that was not flooded). 

Wetted materials are presumed dry when their moisture content readings are within 5 percent of those of like materials in unaffected areas of the building when taken with an intrusive/penetrating moisture meter (Figure 3a). If an intrusive/penetrating moisture meter is not available, Applied Structural Drying a non- intrusive/penetrating moisture meter (Figure 3b) may be used; however, keep in mind that the material moisture results measured from non-intrusive meters may be less accurate than intrusive meters.

Kitchen cabinets, Applied Structural Drying bathroom vanities, and other "built-in" furnishings that were subjected to flood water should be removed from their location to permit drying of the material behind them. Once these "hidden" areas are dried, the furnishings can be reinstalled if they are salvageable.

When saturated wood, drywall, and/or other structural materials vulnerable to fungal growth are naturally air dried over an extended period (weeks), the application of a disinfectant prior to drying can prevent mold growth. Materials /> should be closely observed Applied Structural Drying and disinfectant reapplied at the first sight of mold.General Notes for Drying Foundation Floors Crawlspaces. 

Access to crawlspaces is necessary for decontamination purposes. For crawlspaces that do not have an existing access opening, Applied Structural Drying the simplest method to access the crawlspace is by strategically removing sections of overlying flooring to permit access. When the flooring is not salvageable, removal of the flooring provides the necessary access openings. 

Once access is obtained, gross (solid) contamination should be removed from the ground underneath the building for health and sanitation purposes. Next, Applied Structural Drying any remaining water should be removed. If there is an existing vapor retarder on the ground, it can be left in place to collect spent water and cleaning solutions. 

Following remediation and any necessary final cleaning, the vapor retarder can be left in place to facilitate drying. If there is exposed ground within the crawlspace after cleaning, Applied Structural Drying it should be covered with a plastic vapor retarder to minimize potential mold growth and future moisture migration into the house. 

Plastic vapor retarders can be made watertight by overlapping and sealing them together using either glue or heavy-duty adhesive. Suitable adhesives can be obtained from hardware stores Applied Structural Drying or home improvement centers. After the vapor retarder is placed, the underlying support structure of salvageable wooden floor joists, wood sub-floors, and foundation walls should be cleaned and sanitized. 

Following cleaning, application of a wood preservative will provide protection against fungi Applied Structural Drying and wood destroying insects.Grade slabs. Concrete grade slabs provide a dense barrier between the ground and the interior of the home. Remove mud and gross contamination from slabs by shoveling into suitable containers. 

Reduce soil and contaminant levels on surfaces by flushing off with clear water. The fastest and most efficient method to clean and decontaminate contaminated grade slabs and adjacent building materials Applied Structural Drying and surfaces is by using a residential type of pressure washer to apply a cleaner-disinfectant solution to affected areas. 

Brushes improve decontamination of floors and base of walls by scrubbing solution into affected surfaces. Following the first cleaning, floors and base of walls should be rinsed with water Applied Structural Drying and the cleaning process redone a second time. Squeegees can be used to control or direct spent solution, and wet vacuums can be used to collect spent solutions. 

Following cleaning, the slab should be visually examined for signs of heaving or cracking due to hydrostatic pressure. When in doubt, Applied Structural Drying contact the local building inspector, structural engineer or other appropriate professional.

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