Find a mold remediation professional near Cupertino, CA

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Find a mold remediation professional near Cupertino, CA

44 near you

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Q & A

Answers to commonly asked questions from the experts on Thumbtack.

What is a mold remediation?

Mold remediation is the process of identifying and removing unhealthy levels of mold that have colonized in a home, office, school or other building. Over time, if untreated, mold can destroy a home by breaking down cellulose-based materials (like wood or ceiling tiles) and causing a slow and messy decay. In the shorter term, a mold infestation can cause severe health problems. According to the Federal Emergency Management Agency (FEMA), mold can trigger respiratory problems, nasal and sinus congestion, eye irritation, nose or throat irritation, skin irritations, problems with your nervous system, and aches and pains. Mold inspection and mold remediation are often requested in tandem, although they are two separate services. Nationally, mold inspection costs range from $250 to $300. If mold has been positively identified in your house, either by visual examination or through mold testing, remediation can safely remove it. Properly trained and equipped professionals use specialized equipment (like vacuums and air scrubbers with HEPA filters) to keep mold spores contained while they remove contaminated materials and treat infested areas with antimicrobial spray. A key component to a successful mold remediation after eliminating the mold is ensuring that the water source that caused the mold infestation is also resolved.

How is a mold test done?

Mold testing can help identify a mold infestation in your home or business. Mold inspection costs can vary based on the type of test you want done and the number of samples you request. The national average mold inspection cost is $250-$300. The EPA explains that if you have a visible mold problem, in most cases sampling and testing is unnecessary. However, if you have unexplained and potential mold-related illness or can smell mold in your house, mold inspection costs may be a good investment. To avoid unscrupulous testers, the EPA recommends working with a testing agency that adheres to the analytical methods laid out by professional organizations such as the American Industrial Hygiene Association or the American Conference of Governmental Industrial Hygienists. Mold inspection costs can vary based on the type of testing done. Prices can also vary, depending on the size of the home, the number of surface areas to be tested, and the extent of the mold infestation. Here are some examples of mold inspection average costs:

  • Swab testing: $200-$300
    • A professional collects a surface swab from a potentially infested area for testing in a lab. Some professionals have concerns about this being the sole test done because it only gathers a small amount of data from a certain area of the house. That’s why it’s frequently done in conjunction with air cell testing.
  • Air cell testing: $250-$350
    • A professional collects an air sample in the home to measure the amount of mold spores in the air. This test is frequently done in conjunction with swab testing to ensure more complete data. Costs are higher for this test because the equipment required of the contractor is more expensive.
  • Both air cell and swab tests provided by the same company: $400-$600.

How does mold remediation work?

Mold remediation can eliminate mold colonies from your home or business. Mold is a normal part of daily life, but in wet or humid settings mold can quickly colonize and spread by making spores. Whether visible or hidden, untreated mold can cause real health problems and cause extensive (and expensive) damage to your property. Mold remediation involves killing the mold, removing the dead mold and preventing future mold growth. Here is an example of the steps involved in professional mold remediation:

  • Contain work area and apply negative air pressure HEPA air purifiers to prevent cross-contamination. If spores spread, the colonies can easily regrow elsewhere in your home.
  • Mist an EPA-registered antimicrobial to suspend and kill mold spores.
  • Remove affected building surfaces.
  • Bag and dispose of contaminated materials properly.
  • Treat cavities/underlayment and dehumidify.
  • Abrasively remove dead loose mold.
  • Apply EPA-registered protective sealer.
  • Perform clearance testing.

Remove containment materials.

How much does it cost to clean up mold?

The cost to clean up mold in your home or business will vary based on the pervasiveness of the mold infestation, regional labor rates, and the accessibility of the mold sources for remediation. Mold remediation costs will increase anytime demolition is necessary or the crew must access interior areas like HVAC ducts. For example, these two homes have approximately the same size floor plan but a different number of square feet of mold to be treated. The two homes also have varying levels of accessibility to the sites of mold the mold infestation.

  • House 1:
    • Mold treatment of 15 square feet in an accessible area with a less aggressive type of mold: $3,400 (average).
      • Price includes mold inspection costs.
  • House 2:
    • Mold treatment of 27 square feet inside an HVAC system requiring a higher level of chemicals and processes: $9,500 (average).
      • Price includes mold inspection costs.

How much does it cost to remove mold per square foot?

Mold remediation can be hazardous to the health. DIY cleanup is possible if your health and abilities permit it, but the Environmental Protection Agency recommends hiring a professional if your mold infestation is 10 square feet or larger. The cost per square foot for mold remediation will vary based on where you live (regional labor rates), the size and severity of your mold infestation, and the accessibility of the mold colonies. Here are some examples of mold remediation average costs per square foot:

  • Basic mold remediation in attics and crawl spaces: about $2 per square foot.
  • Mold remediation involving demolition: about $4 to $6 per square foot.
  • Mold treatment of 15 square feet in an accessible area with a less aggressive type of mold: $3,400.
    • Price includes mold inspection costs.
  • Mold treatment of 27 square feet inside an HVAC system requiring a higher level of chemicals and processes: $9,500.
    • Price includes mold inspection costs.
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