Three Winter Clauses for Calgary Window Cleaning Agreements

What to take away

How chinooks change the surface you are cleaning

A chinook is a warm, dry westerly wind that descends the eastern slopes of the Rockies. It can raise Calgary's temperature by tens of degrees in a day, then the wind drops and the refreeze starts.

That cycle changes the work itself. Glass that was dry at 2 p.m. carries a film of meltwater by 4 p.m., and the same film is ice by morning. Runoff from a sill refreezes in the frame channel.

Chinook winds also carry Prairie grit, and melting snow leaves mineral residue behind. A clean that looks finished at midday can show streaking by evening, because the surface was still shedding meltwater when the crew left.

Cold reduces grip strength, and wet gloves on an icy ledge are a fall risk. The Canadian Centre for Occupational Health and Safety sets out how weather and site conditions feed into workplace hazards, and its material on physical hazards covers falls.

Natural Resources Canada publishes energy data and research that helps contractors read how temperature drives building performance, and by extension when exterior work is realistic.

Ice-damage liability clauses

This is the clause Calgary contractors leave out most often, and it produces the ugliest disputes. Meltwater from your work refreezes under a seal or on a neighbouring surface, and the damage shows up the next morning.

A workable clause does four things. It defines the conditions under which you will not start or continue. It states who carries pre-existing seal, frame and glazing defects. It sets a reporting window for the client. It caps your exposure where the client insisted on work outside your written conditions.

Put the reporting window in writing. A client who must notify you within a set period cannot bring a claim weeks later, after several more freeze-thaw cycles have done their own damage.

That is ordinary due diligence: the Canadian Centre for Occupational Health and Safety explains the concept in its guidance on due diligence, and the same logic applies to documenting decisions in a contract.

Confirm with your broker that your policy responds to water damage from exterior cleaning, not only to falls and equipment loss. Limits and exclusions vary, and the general shape of what a policy costs sits in our guide to window cleaning business insurance.

A worked example

A southwest Calgary office building is booked for exterior glass on a February afternoon. The chinook arrives, the temperature climbs above zero, and the crew finishes the south face at 3 p.m. Overnight the wind drops to minus double digits, meltwater in the frame channel freezes, and a sealed unit cracks.

With the clause in place, the sequence is settled. The contract records surface temperature and wind at start and finish. It requires the client to report damage within a set number of days. It assigns the failed seal to the building's maintenance history, which the client warranted as sound. The claim closes without litigation.

Without it, the contractor is arguing about a cracked pane with no records and no agreed reporting window.

Scheduling around temperature swings and wind

Freeze-thaw scheduling converts a judgement call into a rule. The contract names the measurements, the thresholds that trigger a pause, and what happens to the booked slot.

The measurements are surface temperature, air temperature and wind speed at the work face. Wind matters as much as cold here, because it drives wind chill on a suspended platform and it moves a swing stage. Set thresholds with your insurer and your safety officer, then write them in.

The clause should also say who decides. If the crew on site holds that authority, the client cannot argue afterwards that work should have continued. If the client can override, the contract states what the override costs and who carries the risk.

Build the calendar around the forecast, not the other way round. Block high-rise and rope access work into stable cold windows and move low-rise and interior work into chinook days. Our article on scheduling window cleaning work covers the general sequencing method; in Calgary the weather window is the constraint that drives it.

Freeze-thaw scheduling checklist

What the wind does to the schedule

Chinook winds can make suspended access unsafe on a mild, sunny day that looks ideal from the ground. That is the trap: the call is made at height, not in the parking lot.

Alberta's occupational health and safety rules and the suspended access standards set the framework for those calls. The contract should reference them rather than restate them badly. The Canadian Centre for Occupational Health and Safety keeps an overview of acts and regulations across jurisdictions, which is the right starting point when you cite OHS law.

Rope access technique, anchor selection and fall protection are not contract matters. Those sit with CSA Z91 and Z271 and a certified trainer.

Cancellation and stand-down terms

Winter cancellation is where Calgary contracts earn their keep. Clients cancel because the forecast turns, and crews stand down because the site is unsafe. Both need a written rule.

The clause sets a notice period, a fee scale, and a distinction between client cancellation and contractor stand-down. If you stop work for safety, that is not a no-show. If the client cancels inside the notice period, that is a cancellation with a fee.

Your crew is covered by Alberta WCB, and a weather stand-down is a normal part of winter operations. Say so in the contract, so a client reads a safety stop as a cost of doing business in Calgary rather than a scheduling failure. Classification and coverage questions go to WCB, not to the agreement.

The fee scale should reflect real cost. A crew sent home after mobilising has already consumed labour, fuel and equipment time. Price the fee to recover that and state it plainly. Our window cleaning quote template shows how to present those line items so clients see them before they sign.

Keep the tone neutral. A clause that reads as punitive invites an argument; a clause that reads as a shared plan for bad weather gets signed.

Pricing winter risk

Winter pricing in Calgary is not a flat seasonal surcharge. It is a set of adjustments for extra time, extra risk and lost slots.

Three cover most of it. A cold-weather time allowance, because crews work slower in low temperatures and take more breaks. A stand-down allowance, which spreads the expected cost of weather pauses across the season. A rebooking provision, so paused work is rescheduled at the agreed rate instead of becoming a discount negotiation.

Work the allowance from your own numbers. Take the crew's hourly cost, multiply by the extra hours a cold day adds, multiply by the share of winter days you expect to lose, and divide across the season's booked work. Substitute your own figures; the arithmetic is the same for any shop.

Clients accept a winter rate more readily when they can see it pays for safety, records and rebooking. Our window cleaning pricing and profit guide sets out how to build rates from cost rather than from competitor guesses.

Quality control matters more in winter, because defects hide under meltwater and surface the next day. Build a short post-service check into the contract so both sides agree on what finished work looks like. The method in our article on window cleaning service quality is a reasonable basis.

Review the agreement each autumn. Chinook patterns shift, fuel and labour costs move, and a clause written three winters ago may no longer match how you work.

Common questions

Do I need a separate winter contract in Calgary?

Not a separate document, but winter-specific clauses. Ice-damage liability, freeze-thaw scheduling and cancellation terms can sit inside your standard agreement as a seasonal schedule that both parties sign each autumn.

Who pays when meltwater refreezes and damages a window?

It depends on the clause. If the contract assigns pre-existing seal and frame defects to the client and requires prompt reporting, your exposure is limited to what the records show. Confirm the insurance side with your broker.

Is a weather stand-down a no-show?

No. A stand-down is a safety decision by the contractor. The contract should distinguish it from a client cancellation and from an unexplained no-show, because the three carry different fees.

How often should the winter clauses be reviewed?

Once a year, before the freeze-thaw season starts. Check the thresholds, the fee scale and the notice period against what the last winter actually cost you.