24H Mold Inspection of Altadena

What They Do

MoldMold TestingLead Paint

• 11th month warranty inspections
• Annual maintenance checkup
• Indoor allergen sampling
• Lead-based paint testing
• Manufactured home inspections
• Mold sampling
• Multi-unit inspections
• New construction inspections
• Pre-listing inspections
• Rental property inspections

In Their Own Words

24H Mold Inspection is a professional mold inspection and assessment company proudly serving residential and commercial properties in Altadena, California, and surrounding communities. We specialize in providing fast, accurate, and reliable mold inspection services 24 hours a day, ensuring property owners receive timely information and expert guidance when mold concerns arise. Our mission is to protect the health of occupants, preserve property value, and deliver peace of mind through thorough inspections and clear, actionable reporting. Mold growth can pose serious health risks and structural concerns if left undetected or untreated. At 24H Mold Inspection, we understand the urgency of mold-related issues, which is why we offer round-the-

Written by the business on its public profile. We have not verified these claims.

Before You Call 24H Mold Inspection of Altadena

1. Where do you think the moisture is coming from, and who fixes it?
2. Will you set up containment and negative air, and how will you protect the rest of the home?
3. Do you also do remediation? If so, who checks your work?
4. How many air samples will you take, and will you take an outdoor control sample?
5. Is your firm certified under the federal lead renovation rule?

California requires a state contractor license for most repair jobs over $1,000. Ask for the number and check it with the Contractors State License Board.

They list no storefront. Ask where the business is based and whether the crew is their own.

How Their Reviews Break Down

Counts from public listings as of September 23, 2026. A handful of reviews says less than a few hundred.

Read This While You Wait

• DIY with careSafe DIY Mold Cleanup for Areas Under 10 Square FeetA step by step method to clean up mold under 10 square feet safely, with the gear to buy, what to throw away, why bleach is not the default, and when to stop.
• Call a proMold Testing, When It Is Worth It and How to Read a Lab ReportWhen a mold test is worth paying for, which kind to ask for, why store kits mislead, and how to read spore counts, outdoor controls and a lab report yourself.
• DIY with careLead Paint in Homes Built Before 1978What lead paint means in a home built before 1978. Who is most at risk, how to test, what the EPA RRP rule requires, and which practices are banned.
• DIY with careAttic Mold on Roof Sheathing, Causes and FixesWhy mold grows on attic roof sheathing, how to find the cause, the fixes that stop it for good, and how to tell a cosmetic stain from a roof that needs work.