Mold Testing for HOAs and Condo Associations

An association calls a tester when one question needs answering: is this a common element problem or a unit owner problem. Everything else follows from that determination. Who pays, whether the association's policy or the owner's responds, whether a special assessment is coming, and whether the board can document that it acted reasonably.

We test only. We do not remediate, we do not bid the work, and we take no referral fee from anyone who does. For a board that matters specifically, because a board that hires the company that also profits from the repair has handed any dissenting owner a ready-made argument.

Association work under 5,000 square feet runs $650 to $950 depending on sample count. Multi-building and multi-unit scope is quoted, typically $0.10 to $0.20 per square foot plus per-sample, with volume rates on portfolio work and net 30 for established accounts.

Common element or unit, and how testing answers it

Governing documents draw the line differently in every association, so read your declaration. That said, the physical question is usually the same one, and it is testable.

Most declarations put the structure, the roof, exterior walls, foundation and below-grade space, and the plumbing and mechanical serving more than one unit into the common elements, with the interior finishes and the fixtures serving only one unit as owner responsibility. Some documents carve out the limited common elements, meaning balconies, patios, assigned parking and sometimes windows and exterior doors, and assign maintenance to the benefited owner while reserving repair to the association or the other way around.

The technical determination sits underneath that. Water in a unit came from somewhere, and there are only a few candidates:

Above. A failure in the unit above, a roof or deck assembly, or a plugged roof drain. Reads as a downward wetting path with the highest moisture readings at the ceiling or the top of a wall and a thermal signature that follows a discrete path rather than a plane.

Inside a shared chase. A stacked plumbing wall serving multiple units. This is the most common finding in stacked condominium buildings and it is usually common element. Moisture concentrates in the chase and appears in the units on both sides at the same elevation.

Through the envelope. Wall penetration, window or door flashing failure, deck ledger, or below-grade wall. Follows the detail that failed and worsens with weather.

From inside the unit. Supply line, appliance, drain, or occupant-driven condensation. Condensation is distinguishable. It concentrates on the coldest surfaces, tracks with interior relative humidity, peaks in winter, and leaves the wall cavity dry behind visible surface growth. A supply line failure wets the cavity and the framing.

We report the moisture path, its extent, and the fungal condition. We do not interpret your governing documents and we do not tell a board how to allocate cost. What we give you is the physical finding the allocation gets applied to, which is far more useful to counsel and to a carrier than a disagreement between two owners.

Party walls and shared plumbing

Attached construction produces a specific class of dispute. One owner reports a smell or visible growth on a party wall. The adjacent owner reports nothing. The board is asked to decide something with no information.

The correct scope is both sides plus the cavity. Surface readings on one face of a party wall tell you almost nothing about the assembly. Thermal imaging on both faces, moisture readings on both faces, and a borescope port into the cavity produce an answer. In townhome and rowhouse construction with a fire-rated party wall assembly, the cavity is often continuous vertically and sometimes horizontally past the demising line, so water introduced in one location surfaces in another.

Shared plumbing behaves the same way. A stack serving four units is one system, and a failure in it is one event affecting four owners. Testing unit by unit as complaints arrive produces four separate reports and four separate arguments. Testing the stack as a system produces one document.

For that reason the association should usually engage us directly rather than each affected owner hiring separately. One scope, one method, one outdoor control, one report all parties are looking at. It is also cheaper.

Board documentation and fiduciary duty

Boards are volunteers acting for the association, and the standard applied to them is generally whether they acted reasonably and in good faith on the information available. That standard is about process, and process is documentable.

What a defensible record looks like on a moisture issue:

• The complaint, dated, in writing
• The board's decision to investigate, in the minutes
• An independent assessment by a party with no financial interest in the outcome, with method stated
• The finding, including the extent of affected material and its likely source
• The decision made in response, in the minutes, with the reasoning
• Verification that corrective work was completed to a standard, if work was done

The weak link in most associations is the third item. An assessment performed by the contractor who then did the work is not independent, and an owner who disagrees with the outcome will say so at the annual meeting and possibly in a demand letter. The assessment is the cheapest part of the sequence and the part that carries the most evidentiary weight.

We also keep health language accurate, which protects the board. CDC has never established a causal link between Stachybotrys and serious illness, and says no test proves an association between a specific mold and particular health symptoms. Documented effects are allergic reaction, asthma triggering and upper respiratory irritation in sensitive people, plus serious infection risk in the severely immunocompromised. A report that overstates hands an owner a claim the association then has to answer.

Reserve study implications

This is the part boards tend to miss. A moisture finding is frequently a component finding.

If testing establishes that water is entering through failed window flashing on the north elevation, that is not a mold event, that is a building envelope component approaching or past its useful life. If a stack failure is the third one in two years, the plumbing component's remaining life estimate in the reserve study is wrong. If a low-slope roof is producing intermittent leaks that individually look small, the roof component needs to be revisited.

An independent assessment that documents the mechanism, not just the growth, gives the reserve analyst something concrete to work with at the next update. Associations that treat each event as a one-off operating expense and never revisit the component schedule are the ones that end up with a special assessment nobody saw coming.

Worth pairing: both Spokane County and Kootenai County are EPA Radon Zone 1, the highest tier, with predicted average indoor levels above the EPA action level of 4 pCi/L. Ground-floor and below-grade units carry the exposure, and it batches efficiently when we are already on site.

What the assessment includes

• Air sampling with a calibrated pump drawing a measured volume through an Air-O-Cell or Allergenco-D spore trap cassette, analyzed by an accredited laboratory using direct microscopic examination
• An outdoor control on every visit. Outdoor air always contains mold spores. Elevated means elevated relative to outside, same property, same day. An indoor number with no baseline supports no conclusion, and in an association dispute that omission is the first thing a dissenting owner's attorney will find
• Surface sampling by swab or tape lift to confirm visible growth is fungal
• Moisture mapping with pin and pinless meters across the affected assembly and both sides of any shared wall
• Thermal imaging at party walls, deck ledgers, window heads and below-grade walls
• Borescope inspection into wall cavities, plumbing chases and stacks
• Psychrometrics in each affected unit and outdoors: temperature, relative humidity, dew point
• Written report with photographs keyed to unit numbers, raw laboratory data, indoor to outdoor comparison, chain of custody, and stated method and limitations

Post-remediation verification is evaluated against IICRC S520, the industry standard for professional mold remediation, and is quoted by containment count.

Pricing

Quotes are written and fixed before mobilization, which matters when the board has to approve an expenditure at a meeting. We provide a scope document a board can vote on and an invoice a management company can process.

Laboratory results normally return in 1 to 3 business days with the report within a day of that.

Why independence is not optional here

Washington's Department of Health states plainly that there are no certification requirements for mold work in the state and that anyone can call themselves a mold specialist without training or credentials. Idaho licenses neither mold work nor home inspection. Nearly every firm marketing mold testing in this market also sells the remediation.

New York banned that arrangement under Labor Law Article 32, which makes it illegal for one company to both assess and remediate the same property. Washington and Idaho have no equivalent rule, so independence in this market is a choice.

For a board, the practical version is short. If the same company found the problem and priced the fix, every owner who votes no has a talking point, and if the matter escalates, so does opposing counsel.

Questions boards ask

Should the association or the owner hire the tester? When more than one unit or any shared assembly is involved, the association. One report is cheaper and far more useful than competing reports from opposite sides of a wall.

Will you tell us who is responsible? We tell you where the water came from, how far it traveled, and what the fungal condition is. Allocating responsibility is a governing document question for your manager and counsel.

Can you present findings to the board or at an annual meeting? Yes. We explain method and findings factually. We do not offer opinions about fault, assessments, or personnel.

Can you test several units in one trip? Yes, and you should. Give us the unit list up front. One mobilization is where the cost comes down.

Can you validate a proposal we have already received? Yes. Independent moisture mapping establishes the boundary of affected material so the proposed scope can be measured against documented extent rather than against another bid.

Can you invoice our management company? Yes. Send your vendor and insurance requirements and we will complete them first.

Get a scope for your association

Send the property address, unit count, building type, and the units and areas in question. We will return a written scope and a fixed price the board can approve.