Simi Valley, CA 93065 & 93063 • Ventura County
Check your Simi Valley (93065 & 93063) home for mold, moisture, and air quality issues. Schedule your Test-Only inspection.
Local Housing & Environmental Insights • 93065 & 93063
Simi Valley — a thriving suburban community framed by the Santa Susana Mountains and Simi Hills — presents distinct moisture management considerations for homeowners. While the 93063 and 93065 zip codes are known for an arid climate, the valley’s expansive soils and aging 1960s–1980s housing stock can create hidden moisture vulnerabilities. Many original residences were constructed using slab-on-grade methods that, over decades of soil movement, have developed hairline fissures in the concrete.
A critical factor in Simi Valley is the Santa Susana wind-tunnel effect. Intense seasonal Santa Ana winds can dry out and degrade roof flashings and window sealants. When dry winds are followed by sudden winter rainstorms, compromised seals allow water to penetrate the building envelope, dampening wall cavities and attics that stay dry most of the year.
Schedule a professional inspection to assess potential mold risks in your Simi Valley home.
Your Friendly Technical Interpreter. Test-Only
Visual inspections that may include moisture content readings, humidity measurements, and checking common areas where moisture intrusion is often a risk. Includes a detailed written report with findings and recommendations.
Learn More →Our professional mold samples are analyzed by an AIHA-accredited laboratory, with standard results typically available within 2 business days. Rush processing, including next-business-day reporting, is available for an additional fee.
Learn More →Evaluate airborne mold spores, species detected, and ambient air quality. When appropriate, wall cavity air sampling may also be performed.
Learn More →PRV (Post Remediation Verification) or Clearance Testing services involve independent verification and testing to ensure mold remediation was successfully completed.
Learn More →A vital aspect for performing due diligence during real estate transactions, Tanjun Mold Inspections offers pre-purchase and pre-sale inspections for buyers, sellers, and agents in Simi Valley and nearby communities.
Learn More →Promptly identify hidden moisture and potential mold growth after leaks, floods, or plumbing failures to minimize damage.
Learn More →Prompt turnaround times, detailed reports, and friendly, easy-to-understand explanations.
$350+
Base fee starting at $350 for homes up to 1,500 sq. ft.
$95
Per air or surface sample analyzed by an AIHA-accredited lab.
$440+
Starting at $440 for targeted air quality only visit & lab report.
$550+
Starting at $550 for independent PRV visual, moisture & air testing.
Schedule Appointment
If you’re buying a home, noticing a musty odor, or dealing with past water damage, a professional mold inspection can help you make informed decisions.
Professional mold inspections and Indoor Air Quality Testing in Simi Valley, CA can help you identify potential risks early on to maintain a healthy indoor environment — with accurate, reliable results you can trust.
EDUCATOR. NEIGHBOR. SPECIALIST.
"Takes Time to Teach..."
We take time — to provide a friendly and understandable explanation of the inspection findings and the technical details of the report to customers — who are not lab techs.
"Opposite of Corporate..."
Since we're not a chain or franchise — we are not under pressure to meet corporate sales quotas. Instead, we invest in the time and personal attention needed for each unique job.
AIHA Certified
All air and surface samples are logged and processed utilizing trusted, independent AIHA-accredited laboratories with secure chain-of-custody protocols. Reliable data — means informed decisions.
Samples are sent to an AIHA (American Industrial Hygiene Association) accredited laboratory that specializes in environmental microbiology.
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:
Select a mold genus below to review its environmental characteristics and common indoor substrates.
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 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 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 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 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.
Simi Valley, CA 93065 & 93063 • Local Mold Insights
Simi Valley is known for expansive clay soil that swells when wet and shrinks when dry, causing foundations to shift and develop hairline cracks over time. These openings can allow groundwater or irrigation moisture to migrate into crawl spaces or beneath concrete slabs.
The Santa Ana winds funneling through the Santa Susana passes are among the strongest in the region, drying out roofing sealants and window caulking. When winter rainstorms arrive, wind-driven rain can enter these gaps and cause hidden leaks in attics and wall cavities.
Homes built during the 1960s and 1970s were often constructed before modern sub-slab vapor barriers and balanced attic ventilation became standard. In addition, original copper or galvanized plumbing and roofing underlayments from that era are reaching the end of their service life, increasing the risk of pinhole leaks and water intrusion.
The cost of a standard home mold inspection in Simi Valley starts at $350 for homes up to 1,500 square feet. AIHA-accredited lab testing ($95 per sample), indoor air quality testing only ($440+), and post-remediation clearance testing ($550+) are available depending on your property's needs.
MICRO Certified Mold Inspector CMI # 86294
InterNACHI (International Association of Certified Home Inspectors) Certified Mold Inspector
IAC2 Certified, IAC2 Mold Certified (International Association of Certified Indoor Air Consultants)
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.
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.
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.
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.
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Los Angeles County, CA
Ventura County, CA
