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Proactive Testing. Informed Decision Making.

Pre-Sale Home Inspections

Independent, Test-Only Mold & Moisture Inspections for Home Buyers, Sellers, and Real Estate Professionals.


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Your Friendly Test Only Inspector - Tanjun Mold Inspections

Buying or Selling a Home?

Real estate transactions can be an emotional roller coaster. Knowing the property's true condition helps you make smart, informed decisions.

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What Happens During A Mold Inspection?

Pre-Sale Inspection & Testing

1. Visual Inspections

Visual home inspection. Tanjun Mold Inspections professional inspector checking home for moisture, water damage, and visible mold.

Our certified inspectors perform a visual assessment of the property, focusing on areas prone to moisture intrusions and mold growth.

We may take environmental measurements such as moisture content or relative humidity readings. We look for signs of visible mold, water damage, leaks, discoloring, and other conditions — helping identify concerns early in the process.

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2. Surface & Air Sampling

Indoor Air Quality. Air mold sampling being performed in kitchen of modern home.

When requested, air and surface samples equip customers with lab-confirmed mold data. Air samples can detect airborne mold spores not visible to the naked eye.

Samples are analyzed by an AIHA-accredited laboratory to determine mold types and concentrations, providing objective data regarding the property's fungal ecology and condition.

IAQ Testing

3. Inspection Report

Inspector's notes for findings and recommendations report.

A key deliverable is a detailed PDF report along with a friendly explanation outlining inspection findings and lab results, if samples were taken.

Where appropriate, specific recommendations may be outlined including mold remediation protocols as well as important repair or follow-up evaluation tasks — empowering you to negotiate, disclose, or move forward with confidence.

Learn Our Process
Southern California Home Pre-Sale Mold Inspection - Los Angeles and Ventura County

Unbiased Documentation. Fewer Delays.

Supporting Real Estate Transactions

Due Diligence & Disclosures

Clear Documentation for Buyers, Sellers & Agents

Our presale and buyer's home inspections, specializing in mold and water damage investigations, are designed to assist real estate transactions. We equip decision makers with inspection findings, recommendations, and certified lab data when samples are taken.

  • Sellers Preparing to List: Identify and resolve water damage, moisture or mold issues proactively before hitting the market.
  • Buyers Conducting Due Diligence: Understand the true condition of the property before removing contingencies.
  • Agents Protecting Client Interests: Rely on independent, test-only findings that reduce surprises and closing delays.
LA & Ventura County Mold Testing

Serving Los Angeles & Ventura County

We provide professional seller's prelisting (presale) and buyer's home mold inspections throughout Los Angeles County and Ventura County, including Porter Ranch, Northridge, Granada Hills, Tarzana, Santa Monica, West Hollywood, Pasadena, Glendale, Burbank, Sherman Oaks, Thousand Oaks, Westlake Village, Malibu, Simi Valley, Oxnard, and the surrounding communities.

Our local familiarity means we understand Southern California regional building history and styles, coastal moisture issues, and water damage related mold risks — delivering detailed inspection reports that allow you to make informed decisions.

Happy Clients. Successful Inspections.

Customer Feedback

"The opposite of corporate! Genuine, human help when needed most!"

— Monty B., Homeowner Testimonial

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The 3 Vital Methods To Assess Fungal Ecology

Why We Often Combine 3 Methods

Since each inspection method has limitations, relying on just one may miss important details.
Each method answers different mold and water damage questions — Combining all three contributes to a more thorough investigation — both before and after mold remediation.

Method 01

Visual Inspection

Purpose

Checks for visible mold growth, signs of water damage (like stains or bubbling), condensation, and moisture intrusion (such as by windows, sinks, and ceilings)

Limitations

Eyes cannot detect microscopic spores in your air — nor can it see inside walls or under floors. A room can look clean — but have elevated mold spore counts in the air. Surfaces can look dry — but retain high moisture.

See How We Solve This

Combine with Moisture Testing — to detect moisture behind walls or flooring and utilize Air Sampling — to measure invisible airborne spore levels in the breathing zone. Wall Cavity air sampling may be useful if hidden mold growth is suspected behind the walls.

Method 02

Moisture Testing

Purpose

Uses moisture meters to check for high moisture content (MC) such as in walls or flooring. Since mold needs moisture, checking for moisture is key.

Limitations

Moisture meters cannot detect (1) elevated mold spore counts in the air (2) remaining mold from past water damage or (3) if the moisture is trapped deeper into the wall cavity or building materials — even if there is mold growth.

See How We Solve This

Combine with a Visual Inspection — to check if there is visible mold on various building materials. If mold colonization inside walls or flooring causes spores to travel into the ambient air, Air Sampling may be able to detect it. Wall cavity air sampling may be able to detect mold growth behind the walls.

Method 03

Air Sampling

Purpose

Detects (1) mold types and (2) spore counts in the air — helpful for assessing fungal ecology for pre-remediation and essential for post-remediation clearance testing.

Limitations

Although elevated mold spores typically are found close to the growth source, air samples cannot identify the source of the leak. Mold spores may stay inside walls or flooring. Also, heavier and stickier spores may not become easily airborne.

See How We Solve This

Combine with Visual Inspections & Moisture Testing to check for areas at risk for mold growth or to trace elevated spore counts back to the source of the moisture intrusion.

Industry Standard: IICRC S520 Fungal Ecology

Can Visual Checks and Moisture Meters Alone Verify a Condition 1 Status?

No. Since mold spores are not visible when airborne, lab testing is required to assess fungal ecology. Under professional IICRC S520 guidelines, a home's fungal condition falls into three Conditions that eyes and moisture meters alone cannot verify:

Clearance - Post-Remediation Verification (PRV) Passing Clearance means the environment has returned to a Condition 1 status. Practically, this requires performing air sampling inside the containment in order to check the mold types and spore counts detected.
Pre-Remediation Inspections During an inspection where water damage has been experienced, or where there is risk of mold growth, a visual inspection should be combined with moisture content testing and where appropriate, air or surface sampling should be performed to assess the fungal ecology.
● Condition 1 — Normal Fungal Ecology An indoor environment that reflects a normal fungal ecology.
● Condition 2 — Settled Spores An indoor environment that is contaminated with some settled spores.
● Condition 3 — Actual Growth An indoor environment that is contaminated with actual mold growth and associated spores.
AIHA LAP Accredited Laboratory Logo Badge

Samples are sent to an AIHA (American Industrial Hygiene Association) accredited laboratory that specializes in environmental microbiology.

ENVIRONMENTAL MICROBIOLOGY


Lab Reports

What Kind of Information is Contained in Lab Reports?

They provide very technical and detailed information that we analyze and summarize so that it is more friendly and useful to our customers.

The lab analysis will report on any mold found, the amount and the mold types detected (such as Aspergillus/Penicillium, Stachybotrys, Chaetomium, Ulocladium). We determine whether the sample indicates:

  • NORMAL FUNGAL ECOLOGY An indoor environment that reflects a normal fungal ecology
  • SETTLED SPORES An indoor environment that is contaminated with some settled spores
  • ACTUAL GROWTH An indoor environment that is contaminated with actual mold growth and associated spores
FUNGAL DICTIONARY

What are common mold types found indoors?

Select a mold genus below to review its environmental characteristics and common indoor substrates.

Lab technician holding petri dish with mold growth analysis
Alternaria

Alternaria is one of the most common molds and is abundant worldwide. This genus contains around 40 to 50 different species, only a few of which are commonly found indoors. Alternaria spores are easily dispersed through the air by wind. Alternaria can grow on a variety of substrates indoors when moisture is present.

Cladosporium

Cladosporium is an abundant mold worldwide and is normally one of the most abundant spore types present in both indoor or outdoor air samples. This genus contains around 20 - 30 different species. Cladosporium produces dry spores that are formed in branching chains. Spores are released by twisting of the spore-bearing hyphae as they dry. Thus, the spores are most abundant in dry weather. Cladosporium can be found anywhere indoors, including textiles, bathroom tiles, wood, moist windowsills, and any wet areas in a home. Some species of Cladosporium grow at temperatures near or below 0(C) / 32(F) and can often be found on refrigerated foodstuffs and even frozen meat.

Penicillium / Aspergillus

Penicillium / Aspergillus are two separate genera of molds that are so visually similar that they are commonly discussed together as a group. Together, there are approximately 400 different species of Penicillium / Aspergillus. Penicillium / Aspergillus produce dry spore types that are easily dispersed through the air by wind. These fungi serve as a food source for mites, and therefore can be dispersed by mites and various insects as well. Penicillium / Aspergillus are found throughout the home. They are common in house dust, growing on wallpaper, wallpaper glue, decaying fabrics, wallboard, moist chipboards, and behind paint. They have also been isolated from blue rot in apples, dried foodstuffs, cheeses, fresh herbs, spices, dry cereals, nuts, onions, and oranges.

Chaetomium

Chaetomium is a common mold worldwide. This genus contains around 80 - 90 different species. Chaetomium spores are formed inside fruiting bodies. The spores are released by being forced out through a small opening in the fruiting body. The spores are then dispersed by wind, water drops, or insects. Chaetomium can grow in a variety of areas indoors, but is usually found on cellulosebased or woody materials in the home. It is very common on sheetrock paper that is or has been wet.

Stachybotrys

Stachybotrys is ubiquitous in nature. This genus contains about 15 species. Stachybotrys produces wet slimy spores and is commonly dispersed through water flow, droplets, or insect transport, less commonly through the air. Stachybotrys is common indoors on wet materials containing cellulose such as wallboard, jute, wicker, straw baskets, and other paper materials.

Dig Deeper • Educational Guides

Tanjun Knowledge Library

Plain-language guides on mold science, indoor air quality (IAQ), hidden moisture signs, and the test-only process.

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FAQ

Mold Frequently Asked Questions

Our Credentials


MICRO Certified Mold Inspector CMI # 86294

InterNACHI (International Association of Certified Home Inspectors) Certified Mold Inspector

Member # NACHI25081826  |  Certificate # 1755634505

IAC2 Certified, IAC2 Mold Certified (International Association of Certified Indoor Air Consultants)

Certification ID: IAC2-95070

Friendly Communications. Lab Backed Data.

Our Process

Tanjun Mold Inspections performing- Professional Performing Visual Inspections

Visual Inspections

We start with performing a visual inspection of the property, focusing on areas where there may be water damage, moisture issues or suspected mold growth.

Tanjun Mold Inspections - Advanced Tools for Taking Environmental Measurements

Environment Readings

With the help of specialized tools we may take environmental readings such as Moisture Content (MC) or humidity levels in order to identify any potential issues.

Tanjun Mold Inspections - Lab Analysis for Mold Samples

Lab Testing & Analysis

Surface and Air samples may be recommended depending on the inspection findings or customer concerns. Such samples are sent to an AIHA Accredited Lab that specializes in identifying and analyzing mold.

Tanjun Mold Inspections Providing a Comprehensive Findings and Recommendations Report

Findings & Recommendations

Once all of the data is collected, we provide a report of our findings. If a mold growth problem is identified, a Remediation Protocol is outlined.

CONTACT US

Our Process - Advanced Tools for Taking Environmental Measurements

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PHONE Call (818) 964-1533

EMAIL tanjunmold@gmail.com

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Los Angeles County, CA

Ventura County, CA



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