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Preventive building maintenance: what to do, and how often

Building deterioration often develops between scheduled reviews. Preventive maintenance creates a working rhythm — observe, maintain, obtain specialist evaluation and plan — adapted to the building rather than to the urgency of the moment. This guide proposes a framework by frequency and separates four categories of intervention that call on different skills and different decisions. It serves the self-managing owner as much as the owner who delegates the follow-up.

What preventive maintenance is — and what it is not

Published July 14, 2026 · Updated July 14, 2026

What it is: a regular rhythm of observation and upkeep, a written trail, and clear thresholds for calling in professionals. What it is not: a legal minimum — obligations vary by ownership regime and belong to their own texts —, a guarantee against breakdowns, nor a substitute for required professional evaluations. Preventive maintenance can reduce avoidable deterioration; it does not eliminate it.

Four categories of intervention not to confuse

  • Observation — looking, photographing and dating from safely accessible locations, without opening, testing, altering or intervening on systems.
  • Routine upkeep — recurring low-complexity tasks identified by the manufacturer or a qualified service provider, only when safely accessible, within the person's competence and not reserved or regulated.
  • Specialist evaluation — condition assessment by the authorized professional or qualified contractor required for the system or situation.
  • Major and capital work — repair or replacement decisions governed by capital planning and the applicable professional or licensing requirements.

When work requires an RBQ licence, it must be carried out by a holder of the appropriate licence and subclasses. Under the Casaforta model, construction contracts are entered into directly by the owner with the applicable contractor. Any owner-builder licensing requirement or exemption must be verified for the work being considered.

The framework's value lies in the boundary: confusing observation with evaluation can lead to conclusions beyond the observer's role; confusing routine upkeep with major work can turn a decision requiring planning into an improvised expense.

The rhythm by frequency

The rhythm below is an illustrative starting point, not a technical or legal schedule. Frequencies must be adapted to the building's age, systems, use, accessibility and condition, together with manufacturer instructions, professional recommendations and applicable requirements.

  • Monthly — mostly observation: common areas, signs of infiltration or humidity, lighting and exits, recurring tenant requests; light routine upkeep depending on the systems, within the previous section's limits.
  • Seasonal — the transition periods: the apparent condition of drainage, gutters, roofing and caulking from safely accessible locations; seasonal-system start-up or shutdown according to manufacturer instructions or qualified-provider recommendations. Observations during these periods may trigger safely performed routine upkeep or specialist evaluation.
  • Annual — the review: a documented review of safely accessible areas, the year's written trail and upcoming interventions; system servicing at the intervals specified by manufacturers or qualified providers — annual or otherwise — and triage of items requiring specialist evaluation.
  • Multi-year — the long cycles: specialist evaluations follow the interval recommended or required for the system; an updated condition picture; the junction with the capital horizon (see below).

There is no single calendar applicable to every building: it is the regularity of the rhythm, and the trail it leaves, that carry the value.

The written trail: what is not recorded is difficult to verify or reconstruct

Every pass leaves a dated trace: what was observed, what was done, what was postponed and why. The core records and practices are detailed in the Self-Management vs Professional Management guide. For a concrete example of this trail applied to a building: review the Sample Diagnostic.

Where maintenance meets the capital horizon

Preventive maintenance maintains; it does not replace. When a specialist evaluation indicates that a component is approaching major repair or replacement, the file may move from routine maintenance into a repair, replacement and financing decision. The intervention, timing and funding approach then belong to capital planning: 25-year capital plan · component lifespan.

For divided co-ownerships, this practical framework does not replace the specific requirements addressed on the dedicated maintenance-logbook and reserve-fund-study pages. Consult those pages for the applicable framework; this guide does not summarize their content.

If you prefer to entrust the follow-up

The framework stays the same, delegated or not: the rhythm, the categories and the written trail. If you prefer to entrust the maintenance follow-up, ask Casaforta to show how the maintenance rhythm, authorization thresholds, documentary trail and reporting are addressed in its proposal, mandate or supporting documents. The Owner Clarity Diagnostic™ is the usual starting point for complete-management mandates and can establish an initial state of affairs before the final proposal.

See the complete-management mandate

Casaforta management is priced by quotation after qualification. The published "from $950" amount applies to the Owner Clarity Diagnostic™, a separate initial deliverable; it is not the monthly management fee. For complete-management mandates, the Diagnostic is the usual starting point and may be partially credited under the proposal's written terms.

Frequently asked questions

Is there a universal maintenance calendar?
No. Frequencies depend on the building's age, systems, use, accessibility and condition, together with manufacturer instructions and applicable requirements. The framework — observe, maintain, have evaluated, plan — transposes; the specific points adapt.
Does preventive maintenance avoid all breakdowns?
No. It can reduce avoidable deterioration and support better-informed decisions; it guarantees no outcome.
Who can perform which activities?
Observation takes place from safely accessible locations without intervening on systems. Routine upkeep is limited to low-complexity tasks identified by the manufacturer or a qualified service provider, safely accessible, within the person's competence and not reserved or regulated. Specialist evaluation belongs to the authorized professional or qualified contractor required for the system. When work requires an RBQ licence, it must be carried out by a holder of the appropriate licence and subclasses. Under the Casaforta model, construction contracts are entered into directly by the owner with the applicable contractor. Any constructor-owner licensing requirement or exemption must be verified for the work being considered. For the complete distinction and official sources, see the regulated boundaries in the complete-management guide. This guide is not legal advice.
What should I record?
A dated trace of every pass: findings, actions taken, postponements and reasons. The core records are detailed in the Self-Management vs Professional Management guide.
What does preventive maintenance cost?
Costs vary by building and systems; this guide quotes no amount. For the cost of delegated management, see the plex management-cost guide. The published "from $950" amount applies to the Owner Clarity Diagnostic™, a separate initial deliverable; it is not the monthly management fee.

From rhythm to method

A documented maintenance rhythm supports decisions grounded in observed facts.

Want an initial state of affairs before building your maintenance rhythm? Request my Diagnostic.

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