NORMI™ Professional Guidance for DIY Remediation

In general, a well-trained and experienced indoor mold remediation professional (CMR) should be consulted when performing remediation. You may find a NORMI CMR in your area by searching online at

The following guidelines are applicable to non-trained individuals performing mold remediation on areas potentially affected by less than ten square feet of (10 ft2) of visible indoor mold growth. Care must be taken to protect the health of the occupants and workers by utilizing proper PPE (Professional Protection Equipment), possibly the need for containment and established negative pressure. When this criteria is not met, a professional must be consulted.

In all situations, the underlying moisture problem should be corrected to prevent recurring indoor mold growth. This is best accomplished by a professional Assessor (CMA) or, if unavailable, a DIY PSP (Professional Screening Partner) Assessment Kit, available at

  1. (a)  Indoor moisture can result from numerous causes in which case a licensed professional might be engaged to make the appropriate repairs

  2. (1)  Façade and roof leaks (roofing contractor);

  3. (2)  Plumbing leaks (plumbing contractor);

  4. (3)  Floods (water extraction contractor);

  5. (4)  Condensation (architect or general building contractor); and/or

  6. (5)  High relative humidity (mechanical engineer or HVAC contractor).

  1. (b)  Relative humidity should be maintained at levels between forty and sixty percent (40%-60%) to inhibit indoor mold growth.

  2. (1)  Short term periods of higher humidity are not expected to result in indoor mold growth.

  3. (2)  Condensation on cold surfaces could result in water accumulation at much lower levels.

  4. (3)  Relative humidity should be kept low enough to prevent condensation on windows and other surfaces.

To successfully and safely remediate mold, building maintenance staff or those working in the mold infected area, should be properly trained on issues such as:

  • The causes of moisture intrusion and indoor mold growth;

  • Health concerns related to mold exposure;

  • The use of appropriate PPE (personal protective equipment); and

  • Mold remediation work practices, procedures, and methods.

Online classes for these and other subjects are available at When responding to areas damaged by water for 24-48 hours, and before indoor mold growth occurs, the table in this section should be considered:

Guidelines for Response to Clean Water Damage within 24-48 Hours to Prevent Indoor Mold Growth Books and papers

  • For non-valuable items, discard books and papers.

  • Photocopy valuable/important items, discard originals.

  • Freeze (in frost-free freezer or meat locker) or freeze-dry.

Carpet and backing (dry within 24 – 48 hours~)

  • Remove water with water extraction vacuum.

  • Reduce ambient humidity levels with dehumidifier.

  • Accelerate drying process with fans.

Ceiling tiles

  • Discard and replace

Cellulose insulation

  • Discard and replace

Concrete or cinder block surfaces

  • Remove water with water extraction vacuum.

  • Accelerate drying process with dehumidifiers, fans, and/or heaters

Fiberglass Insulation

  • Discard and replace

Hard surface, porous flooring (linoleum, ceramic tile, vinyl)

  • Vacuum or damp wipe with water and mild detergent and allow to dry; scrub if necessary.

Non-porous, hard surfaces (plastics, metals)

  • Vacuum or damp wipe with water and mild detergent and allow to dry; scrub if necessary.

Upholstered furniture

  • Remove water with water extraction vacuum.

  • Accelerate drying process with dehumidifiers, fans, and/or heaters.

  • May be difficult to completely dry within 48 hours. If the piece is valuable, you may wish to consult a restoration/water damage professional who specializes in furniture.

Wallboard (drywall and gypsum board)

  • May be dried in place if there is no obvious swelling and the seams are intact. If not, remove, discard, and replace.

  • Ventilate the wall cavity, if possible.

Window Drapes Wood surfaces

  • Follow laundering or cleaning instructions recommended by the manufacturer. Remove moisture immediately and use dehumidifiers, gentle heat and fans for drying. (Use caution when applying heat to hardwood floors.)

  • Treated or finished wood surfaces may be cleaned with mild detergent and clean water and allowed to dry.

  • Wet paneling should be pried away from wall for drying.

*If indoor mold growth has occurred or material has been wet for more than 48 hours, consult the table in below. Even if materials are dried within 48 hours, indoor mold growth may have occurred. Consult an indoor mold assessment professional if in doubt. Note that indoor mold growth will not always occur after 48 hours; this is only a guideline.

These guidelines are for damage caused by clean water. If you know or suspect that the water source is contaminated with sewage, or chemical or biological pollutants, then Personal Protective Equipment and containment are required by the Occupational Safety and Health Administration (OSHA). Do not use fans before determining that the water is clean or sanitary.

If a particular item(s) has high monetary or sentimental value, you may wish to consult a restoration/water damage specialist.

The subfloor under the carpet or other flooring material should also be cleaned and dried. See the appropriate section of this table for recommended actions depending on the composition of the subfloor.