Mold Testing

Get clear answers about suspected mold with targeted surface sampling, laboratory analysis and practical recommendations.

Nexus Environmental Services Ltd. provides mold testing—for residential, commercial, industrial and multi-residential properties throughout Alberta.

Whether you have discovered suspicious growth, experienced water damage or need documentation of affected building materials, we help determine whether selected samples contain fungal growth and explain the findings.

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✓ Bulk and tape-lift sampling of suspect materials
✓ Laboratory examination and identification
✓ Clear results and practical recommendations

Understand Suspected Mold Before Taking the Next Step

Investigating Suspicious Growth

Determine whether discoloration or suspected growth on a sampled surface contains fungal structures.

Assessing Water-Damaged Materials

Obtain laboratory information about selected materials affected by leaks, flooding or persistent dampness.

Supporting Cleanup Planning

Document findings to help property owners and restoration contractors understand the sampled conditions.

What Is Mold Testing?

Mold testing involves collecting samples from suspect surfaces or materials and submitting them to a laboratory for examination.

Nexus uses bulk and tape-lift sampling to investigate suspected mold on building materials and other accessible surfaces.

Laboratory examination can help establish whether fungal structures are present and identify fungal types to the level supported by the sample and analytical method.

Testing is most useful when it answers a specific question, such as whether an uncertain stain represents fungal growth. Where mold growth is already evident, identifying its type is not normally necessary before addressing the affected materials and moisture source.

Mold Testing May Include:

✓ Discussion of the concern and water-damage history
✓ Visual review of the agreed assessment area
✓ Selection of appropriate sample locations
✓ Tape-lift sampling of suspect surfaces
✓ Bulk sampling of selected materials
✓ Laboratory examination
✓ Photographs and sample-location descriptions
✓ Explanation of results and assessment limitations
✓ Practical recommendations for further action

Important: Results apply to the samples collected. They do not establish conditions throughout an entire building or determine whether mold caused an individual’s symptoms.

What Does Mold Testing Include?

Review of Your Concern

We discuss where the suspected growth was found, when it appeared and whether leaks, flooding, condensation or previous repairs may be relevant.

Visual Review

Accessible surfaces within the agreed scope are reviewed for suspected growth, staining and visible evidence of moisture damage.

Observations help guide sample selection and provide context for the laboratory findings.

Tape-Lift Sampling

A sampling adhesive is applied to a selected surface to collect material for microscopic examination.

This method is useful for investigating suspected growth on accessible surfaces while generally causing little disturbance.

Bulk Sampling

A small piece of suspect material is collected and submitted to the laboratory.

Bulk sampling may be appropriate where examination of the material itself is needed. Collection can leave a visible sample location, which is discussed before sampling.

Laboratory Examination

Samples are examined for fungal structures. The laboratory reports findings according to the analytical method and the characteristics of the sample.

Identification may be limited to a fungal group or genus rather than an exact species.

Results and Recommendations

We explain what the results establish, their limitations and how they relate to the observed conditions.

Recommendations may include addressing moisture sources, cleaning or removing affected materials, obtaining specialist remediation support or investigating concealed areas.

When Should You Consider Mold Testing?

Targeted mold testing may be useful when:

Discoloration cannot readily be distinguished from suspected fungal growth
A landlord or property owner needs documentation of selected materials
Water-damaged materials require further evaluation
A restoration contractor requests laboratory identification
A property transaction raises a specific concern about suspected growth
Previous cleanup has left uncertain staining or suspect material
Documentation is needed to support a defined building investigation

Testing is not necessary for every mold concern. In many cases, visible growth and moisture damage provide enough information to begin planning corrective work.

Nexus helps determine whether sampling will provide useful information for your situation.

Found Suspicious Growth or Water-Damaged Materials?

Send us the property address, photographs of the affected area and a brief description of the concern.

Include any known water-damage history and your required completion date. We will provide a proposal outlining the assessment area, sampling scope, laboratory analysis and reporting.

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Where Can Mold Grow?

Mold can develop where suitable materials remain damp. Common areas of concern include:

Drywall and paper-faced building products
Wood framing and sheathing
Basement walls and finishes
Ceiling materials beneath roof or plumbing leaks
Window surrounds affected by condensation
Bathrooms and laundry areas
Cabinets beneath leaking sinks
Carpet backing and other porous finishes
Materials affected by flooding
Surfaces behind furniture or stored items
Concealed areas surrounding persistent leaks

The presence of growth does not identify the moisture source by itself. Addressing the underlying dampness is important to reduce the likelihood of recurrence.

Does Mold Color Tell You How Dangerous It Is?

No. Color alone cannot reliably identify the fungal type or determine the health implications.

The phrase “black mold” is often used to describe dark growth, but many different fungi can have a similar appearance.

Laboratory examination can provide information about a sample, but it does not establish toxicity or individual health risk on its own.

Nexus explains the findings without relying on alarming labels or unsupported conclusions.

Does Mold Testing Include Mold Removal?

No. Testing documents sampled conditions and provides information to support decisions about the affected area.

Cleaning, removal and restoration are separate activities. The appropriate approach depends on the extent of growth, material type, moisture conditions and accessibility.

Where specialist remediation is warranted, the findings can help inform discussions with an appropriate restoration contractor.

Why Choose Nexus Environmental?

Nexus Environmental Services Ltd. is an Alberta-based environmental consulting company providing targeted mold sampling and practical property-assessment support.

Focused Sampling

Samples are selected to answer the specific questions raised by the suspected growth and affected materials.

Clear Communication

You communicate directly with the environmental professional completing the assessment. We explain what the testing can establish and how to interpret the results.

Laboratory-Supported Findings

Selected samples are submitted for examination rather than relying solely on surface appearance.

Practical Recommendations

Recommendations consider the sampled findings, visible conditions and the importance of addressing moisture.

Useful Documentation

Sample locations, photographs and laboratory results provide a record of the materials assessed.

Additional Environmental Support

Nexus also provides hazardous materials surveys, Phase I and Phase II Environmental Site Assessments, groundwater monitoring and other environmental consulting services.

Mold Testing Services Across Alberta

Nexus Environmental Services Ltd. provides bulk and tape-lift mold testing throughout Alberta.

Based in Lethbridge, we serve clients in Calgary, Edmonton, Red Deer, Medicine Hat, Brooks, Taber, Fort Macleod, Claresholm, Pincher Creek, Crowsnest Pass and communities across the province.

We assist homeowners, landlords, property managers, commercial property owners and restoration project teams throughout urban and rural Alberta.

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Frequently Asked Questions

What Is the Difference Between Tape-Lift and Bulk Sampling?

Tape-lift sampling collects material from a selected surface using a sampling adhesive.

Bulk sampling involves collecting a small piece of the material itself. The appropriate method depends on the surface, material and question being investigated.

Can Testing Distinguish Mold from an Ordinary Stain?

Laboratory examination can help determine whether fungal structures are present in a sample.

Results must be interpreted alongside the sample location and observed conditions. A result from one location does not establish what is present elsewhere.

Do I Need Testing If Mold Is Clearly Visible?

Not necessarily. Visible mold generally needs to be addressed along with its moisture source, regardless of the fungal type.

Sampling may be useful where identification or documentation answers a specific project question.

Can You Identify the Exact Species?

Not always. Identification depends on the structures present and the analytical method.

The laboratory may report a fungal group or genus rather than an exact species. Some samples contain insufficient identifying features for more detailed classification.

Does a Positive Result Mean the Entire Building Is Affected?

No. A positive result describes the sampled material or surface.

Determining the extent of a problem requires consideration of the visible conditions, moisture history, accessibility and any further investigation needed.

Can a Negative Sample Rule Out Mold Throughout the Property?

No. A negative finding applies to the collected sample and the method used.

Growth may be present in other locations, including concealed areas that were not assessed.

Can Testing Find Mold Behind Walls?

Sampling requires access to the material being assessed.

Where concealed growth is suspected, an agreed investigation may require openings or other access arrangements. This work should be planned with appropriate precautions for building materials and occupants.

Will Sampling Damage the Surface?

Tape-lift sampling generally causes little disturbance, although fragile finishes may be affected.

Bulk sampling removes a small portion of material and may leave a visible opening. Sample locations and access requirements are discussed beforehand.

Can Testing Determine Whether Mold Is Making Someone Sick?

No. Material testing does not diagnose illness or establish the cause of an individual’s symptoms.

Health concerns should be discussed with a healthcare professional.

Does Sampling Check for Asbestos or Other Hazardous Materials?

Not automatically. Mold examination and hazardous material analysis are separate laboratory services.

If sampling may disturb suspect asbestos-containing materials, that concern should be addressed before collection. Let us know about any existing hazardous materials information.

How Long Does Mold Testing Take?

Completion time depends on site access, the number of samples, laboratory turnaround and reporting requirements.

Provide your required completion date when requesting a quote so scheduling can be confirmed.

How Much Does Mold Testing Cost?

The cost depends on the property location, assessment scope, number of samples, laboratory requirements and level of reporting.

Send Nexus photographs and a description of the concern to receive a project-specific quote.

What Information Is Needed for a Quote?

Provide the property address, photographs, the approximate size and location of the affected area, any known moisture history and your required completion date.

Include any previous testing or restoration information and the reason documentation is needed.

Get Clear Answers About Suspected Mold

Whether you are investigating an uncertain stain, documenting water-damaged materials or planning corrective work, Nexus Environmental Services Ltd. can provide targeted sampling and clear interpretation.

Send us photographs, the property address and a description of your concern to receive a straightforward mold testing proposal.