Real Estate Due Diligence

Real Estate IAQ Assessments: Know Before You Close

A standard home inspection checks for code violations and major defects. An ESG Indoor Air Quality Assessment evaluates what a home inspection can't: mold, moisture intrusion, odors, and hidden air quality problems that can affect your health and your investment. Schedule early. Due diligence windows close fast.

Schedule Your IAQ Assessment Call 336-373-1538

Independent Testing No Conflict of Interest Certified Inspectors IICRC-Referenced Standards

Bright residential living room of a home under purchase contract

What a home inspection misses

Code-compliant, and still a health risk

A home can pass a standard inspection and still have serious indoor air quality problems. Mold growth behind walls, moisture intrusion under floors, and chemical off-gassing from materials are invisible to a visual inspection. Only an IAQ professional is certified to determine whether suspect microbial growth is actually mold, rather than assuming based on appearance alone.

Modern kitchen that appears clean while hidden air quality conditions go untested

Home Inspection Only

Visible defects found, hidden problems missed

Standard home inspections focus on structural defects, code compliance, and major systems. They do not evaluate indoor air quality, test for mold, measure moisture intrusion, or identify odor sources. Health-related issues that affect the air you breathe are outside the scope of a general inspection.

ESG air quality meter running inside a residential room during an assessment

After ESG IAQ Assessment

Documented findings before your due diligence closes

ESG uses advanced equipment to evaluate mold, moisture, odors, and air quality red flags that direct next steps. You receive a written report approximately one week after payment, with enough time to review findings, line up contractor quotes, and make a confident decision before your due diligence deadline.

What's included

A science-based IAQ assessment built for real estate decisions

ESG's real estate IAQ assessment evaluates conditions connected to health concerns, odors, mold, and moisture intrusion, identifying potential hidden problems that may be affecting the air quality of the home you're considering purchasing.

Mold and microbial growth assessment: only an IAQ professional is certified to determine whether suspect microbial growth is actually mold, rather than assuming based on appearance alone

Moisture intrusion evaluation: advanced equipment identifies moisture conditions that are often invisible to visual inspection but create conditions for mold growth and structural damage

Odor source identification: ESG uses advanced equipment to identify air quality "red flags" that help direct recommendations and next steps, rather than guessing by smell alone

Remediation contractor guidance: ESG maintains a referral list based on non-biased, industry-standard qualifications and can help you understand what standards a remediation contractor should meet (IICRC-certified, following ANSI/IICRC S520)

Due diligence timeline guidance: ESG advises on how to protect your decision window, including when to seek contractor quotes and whether to request a due diligence extension if issues are discovered

Written report delivered about 1 week after payment: clear findings and recommendations suitable for sharing with your real estate agent, attorney, or remediation contractors for accurate quotes

Moisture meter pressed against a residential wall to detect hidden moisture

Technician swabbing suspect microbial growth on a wall for lab analysis

Open case of calibrated air sampling equipment used during assessments

Printed ESG report pages showing moisture readings and findings

Why ESG

We test. We never remediate. That protects your interests completely.

When ESG identifies mold, moisture, or other issues in a home you're considering purchasing, we have zero financial stake in the remediation. We don't refer contractors for a fee, we don't perform cleanup work, and we don't profit from the size of the problem we find. Our only product is accurate information.

This independence matters in real estate. Some inspection and testing firms have relationships with remediation contractors, creating incentives to find (or overstate) problems. ESG maintains a referral list based strictly on non-biased, industry-standard qualifications so that if you need contractor guidance, it's grounded in professional standards like the ANSI/IICRC S520, not referral economics.

ESG recommends calling as soon as your purchase contract is signed. The earlier you schedule, the more time you have to review findings, get contractor quotes, and make confident decisions before your due diligence window closes.

Schedule Your Assessment

~1 wk

Written report delivered after payment

S520

ANSI/IICRC mold remediation standard we reference

Remediation services sold, total independence

Certified

IAQ professionals, not general home inspectors

Our process

Schedule the day your contract is signed

Due diligence windows are short. ESG's process is designed to give you maximum time to review findings, consult contractors if needed, and make an informed decision before deadlines close.

ESG consultant reviewing paperwork with a client at a table

Schedule Immediately

Call ESG as soon as your purchase contract is signed. This maximizes the time available for assessment, reporting, and, if issues are found, contractor estimates, all within your due diligence window.

Technician using an infrared thermometer to check surface conditions in a home

On-Site Assessment

ESG visits the property with advanced equipment to evaluate mold, moisture intrusion, odors, and air quality conditions. The home should be undisturbed before testing: avoid cooking, smoking, cleaning, open windows, or walkthroughs during the assessment.

Labeled surface sample collected for laboratory analysis

Lab Analysis & Written Report

Samples are submitted for laboratory analysis. ESG delivers a written report approximately one week after payment, detailing findings, air quality red flags, and professional recommendations for next steps.

Well-kept single family home exterior on a clear day

Clear Report, Confident Decision

Use ESG's findings to negotiate repairs, request contractor estimates, or make a fully informed decision to proceed or walk away. If widespread issues are found, ESG advises obtaining all quotes before due diligence ends, or requesting an extension.

IAQ assessment vs. home inspection

Two different tools for two different jobs

ESG IAQ Assessment

Focuses on conditions that may relate to health, odors, mold, and moisture, using data-driven methods that reflect the current state of indoor air quality and detect issues that may not be visible to the eye.

Certified to determine whether suspect growth is actually mold
Advanced equipment identifies hidden moisture and odor sources
No conflict of interest: ESG never performs remediation
Report gives contractors the detail they need for accurate quotes

Home Inspection Alone

Primarily identifies code violations and major building defects through visual inspection. Health-related conditions, especially mold, moisture, and air quality, are generally outside its scope.

Cannot determine if visible growth is mold without lab testing
Hidden moisture intrusion often missed without advanced equipment
Does not evaluate air quality parameters or odor sources
Some inspectors have contractor relationships, a potential bias

Why home buyers choose ESG

Independent, certified, and accountable

ESG has provided independent environmental testing from Greensboro, NC since 2002. Every real estate assessment is built on the same standards.

Independent since 2002: 23+ years of environmental testing experience

We test, we never remediate, so findings are never inflated to sell work

Every report peer-reviewed by two certified professionals

Certifications include CIEC, CMR, CIH, IICRC, and EPA Lead-Safe

BBB A+ rated and family-owned, based in Greensboro, NC

Serving home buyers across NC, VA and TN

Common questions

Frequently asked questions

Do I need an IAQ assessment if I already have a home inspection?

Yes. They serve different purposes. A home inspection focuses on code compliance and major building defects through visual inspection. An IAQ assessment targets health-related concerns like odors, mold, and moisture using advanced equipment and laboratory analysis. Only a certified IAQ professional can determine whether suspect microbial growth is actually mold.

When should I call ESG during the home buying process?

Call immediately after your purchase contract is signed. This gives ESG more time to assess the property and prepare your findings, and gives you more time to review recommendations and, if needed, line up qualified contractors for quotes before your due diligence deadline closes.

How should the home be prepared before testing?

To avoid inaccurate readings, the home should have minimal disturbance before testing. Avoid high activity and movement in the home, cooking, smoking, showering, cleaning, laundry, open windows or doors, spraying airborne products like hairspray, and conducting walkthroughs or other inspections during the test period.

What if the home inspector found visible suspect microbial growth?

Start researching certified remediation contractors right away and plan for quotes to take time, since it can take weeks to schedule and receive estimates. Contractors can provide more accurate pricing after reviewing ESG's full written report. You may also need multiple specialists: remediation contractors, HVAC consultants, waterproofing professionals, or structural engineers.

Can ESG tell me how much remediation will cost?

No. ESG provides independent testing and assessment only. We do not perform remediation work and cannot provide cost estimates; that requires a quote from a licensed remediation contractor. ESG's written report gives contractors the detail they need to provide accurate pricing.

What mold remediation standard should contractors follow?

ESG recommends using remediators certified by the IICRC and following the ANSI/IICRC S520 Standard and Reference Guide for Professional Mold Remediation, the industry-recognized standard for professional mold remediation. ESG maintains a referral list based on these non-biased, industry-standard qualifications.

Schedule Your Real Estate IAQ Assessment

If you're under contract, the best time to schedule is now, so you have time to review findings, request contractor estimates if needed, and make confident decisions before your due diligence window closes.

Ready to get started?