Mould, pests, heat or leaks: keeping a record of rental conditions

To keep a record of conditions like mold (or mould), pests, a lack of heat or recurring leaks in a rental, photograph the same spots on a regular schedule so the photos show change over time, and write a short factual note with each set. For heat and dampness, add simple readings, such as the indoor temperature at set times. Report each problem to the landlord in writing and keep copies of those reports, any replies, and any visit or treatment that follows.

Describe what you see, smell, hear and measure rather than what you think it means. Keep any health information to a minimum and stored privately. What landlords must do about conditions, and which public body can inspect, differs by province, territory, state and city, so the official landlord-tenant body or a tenant legal clinic is the place to ask about your options.

A broken lock is either fixed or not. Conditions are different. Mould spreads slowly along a window frame, cockroaches appear at night and vanish by morning, a radiator works on mild days and fails during a cold snap, a ceiling leaks only when it rains hard. One photo shows a moment; it cannot show that a problem has lasted six weeks or keeps coming back.

That is why the method here is about repetition. A sequence of dated photos, readings and short notes shows when a condition started, how it changed, what was reported, and whether anything improved after a visit or treatment.

1. Pick fixed spots for each problem, such as the bedroom window corner, the cabinet under the sink, or the ceiling above the tub.
2. Take a wide shot that shows the room, then a close-up from the same position each time.
3. Put a ruler, tape measure or coin in the close-up so growth or spread can be compared.
4. Repeat on a schedule, for example every Sunday, and also whenever the problem changes or after any visit.
5. Use video for things that move or come and go, such as pests at night, a drip, or a heater cycling on and off.
6. Photograph before anyone cleans, paints over or treats the area, and again afterwards.
7. Keep the original files and back them up away from your phone, with the date in the file name or a note.

A picture of a radiator does not show that the room was cold. A basic indoor thermometer, or one that also shows humidity, turns that into something you can write down. Consistency matters more than precision: the same device, in the same spot, at the same times of day.

• Place the thermometer away from windows, heaters and direct sun, at about chest height.
• Record the reading at set times, such as 7 a.m. and 9 p.m., with the room name.
• Note the outdoor temperature from a public weather service for the same time, which puts the indoor reading in context.
• Photograph the display now and then, with a clock or phone screen in view.
• For dampness, note humidity readings, condensation on windows, and whether a fan or dehumidifier was running.

Strong labels like toxic mold, infestation or unlivable invite argument and are hard for anyone to check. Plain descriptions are easier to rely on: colour, size, location, smell, sound, how often, and since when. Leave conclusions about causes and health effects to people qualified to make them.

Less useful: The bathroom is full of toxic black mould and the landlord does not care. More useful: Dark spotted patch on the bathroom ceiling above the shower, about 30 by 20 cm, first noticed Oct 2, now about twice that size (photos B-01 to B-06). Musty smell when the door has been closed overnight. Reported by email Oct 3 and Oct 17.

Health Canada's page on mould says that if you rent your home, you should speak to your landlord about any mould problems, and that information on landlord and tenant rights and responsibilities is available from your provincial or territorial government. In the US, HUD's resident rights brochure for HUD-assisted multifamily housing lists the right to decent, safe and sanitary housing and to timely repairs on request. In either country, a written report with photos attached gives the problem a clear start date.

Some conditions are urgent. CMHC's maintenance guidance for Canada describes emergencies as problems that affect the tenant's health or safety or put the building at risk, and says tenants should try to contact the landlord at least twice in an emergency. Whatever the urgency, log every attempt to reach someone, including calls that went to voicemail.

Pest treatments create their own paper trail. Health Canada's guidance for landlords and building managers says tenants must be told when they can safely return to their unit after a pesticide application, and encourages landlords to give tenants the product name and registration number. If a treatment happens, record those details along with the rest.

• The date of each written report and the channel used, with a copy saved.
• Any preparation instructions you received, such as bagging clothes or emptying cupboards.
• Treatment or repair dates, who came by role, and what they did.
• Product names and registration numbers if provided, and the stated re-entry time.
• Follow-up visits, and whether the problem returned, with photos from your usual spots.

Depending on where you live, conditions in rental housing may fall under a city or county property standards office, a housing or building inspector, or a public health unit. Health Canada's bedbug resources, for example, note that provincial and municipal public health officers are responsible for local health issues. Which office applies and how it works varies widely, so a tenant legal clinic or the official landlord-tenant body can tell you what exists in your area.

If an inspection does take place, treat it like any other event in the file: the date, the office, the inspector by role, what they looked at, any reference number, and a copy of any report or order you are given. Photograph the same spots that day so your sequence lines up with what the inspector saw.

Conditions like mould, pests or cold can affect health, and it is natural to want to write that down. A condition log, though, is often shared with a landlord, a mediator or a clinic. Keep the main log symptom-free and focused on the unit. If health matters to your situation, keep that information in a separate private note or folder.

• Record only what a reviewer would need, such as the date of an appointment, not a full medical history.
• Keep any letter from a health provider in the private folder, not attached to messages to the landlord.
• Share health details only with someone who needs them to advise you, and only after asking why they are needed.
• Never post photos of your unit, your health details or the landlord's information on social media.

• Nov 4, 7:00 a.m. Living room 15 C, bedroom 14 C, outdoor minus 6 C. Radiator in bedroom cold to the touch. Photo of thermometer H-03.
• Nov 4, 9:12 a.m. Email to property manager reporting low heat since Nov 1, readings attached. Copy saved E-21.
• Nov 7, 11:30 p.m. Video K-02, about 20 seconds: three cockroaches near the stove base after lights on. Second sighting this week.
• Nov 12, 2:00 p.m. Pest control contractor treated kitchen and bathroom. Written notice gave product name and a four-hour re-entry time. Notice saved D-09.
• Nov 26, 6:45 p.m. Ceiling leak above the bathroom fan during heavy rain. Bucket placed. Photos W-11 to W-13. Third leak since September.

Should I pay for mold testing? Health Canada's mould page says that in most cases there is no need to measure the actual concentration of mould in indoor air, and that the focus is on finding and fixing moisture and mould problems. Testing does not replace a clear record of what you see and when. If someone suggests it in your situation, ask a tenant legal clinic or the relevant public body first.

Can I clean the mould or set traps myself? Small everyday cleaning is part of normal life, but photograph first so the record survives. For anything larger, or for pesticides, check your lease and ask the landlord in writing before acting, since responsibilities differ by place.

What if the problem comes from a neighbouring unit? Record it the same way and note what you observe about the source, such as water stains spreading from a shared wall. Leave the question of who is responsible to the landlord and, if needed, a qualified reviewer.

How often should I take photos? Weekly is enough for slow changes like mould. For pests, cold or leaks, record each occurrence. A gap of several weeks with no entries can make a problem look like it stopped, even if it did not.

Weekly photos, temperature readings and treatment notices add up quickly, and SteadyFile can keep them in order. Start a free rental housing file in the browser at app.steadyfile.com, with no account needed, and log each reading, sighting, report and visit as a dated entry. Each photo series, email and notice gets an ID in the records index, and the people list keeps the superintendent, contractor and inspector straight by role. With an account, entries keep their creation date and edit history. When you speak with a clinic, the exported chronological packet shows the condition over weeks or months in a few pages. The landlord has no access, and SteadyFile does not assess the condition or its health effects.