When is the best time to power wash in Calgary?

The best time to power wash exterior surfaces in Calgary is late spring (May to June) after the last frost risk has passed — temperatures should stay above 5°C for at least 48 hours after washing to allow surfaces to dry without freezing. Early fall (August to September) is the second best window, particularly before applying stain or paint to a deck or fence. Avoid power washing in below-freezing temperatures — water that infiltrates wood joints or brick mortar and then freezes can cause spalling, cracked mortar, and wood checking.

What PSI should I use for different Calgary surfaces?

Pressure by surface: vinyl siding (800 to 1,200 PSI, fan tip 40°), wood siding (600 to 800 PSI, fan tip 40° — higher pressure damages wood fibres and paint adhesion), concrete driveway (2,000 to 3,000 PSI, 15° or 25° tip), wood deck (500 to 800 PSI, fan tip 40°, with grain not against it), brick (1,000 to 1,500 PSI, fan tip 25° — avoid high pressure on mortar joints), composite decking (follow manufacturer spec — many warranty voids from power washing over 1,500 PSI or with a zero-degree tip). Calgary's freeze-thaw softens concrete and brick mortar over time; use lower pressure than you think you need on aged masonry.

Can power washing damage Calgary wood siding or decking?

Yes — this is the most common power washing mistake. Too much pressure (over 1,500 PSI on wood) or using a 0° or 15° tip too close raises the wood grain, splinters the surface, and can drive water so deep into the wood that it takes days to dry properly. On Calgary homes with older cedar siding, high-pressure washing can strip paint, open wood checks, and create new entry points for moisture. The correct approach for wood surfaces is the lowest pressure that still cleans effectively, with a wide-fan 40° tip, maintaining at least 30 cm distance from the surface.

How much does power washing cost in Calgary?

Power washing pricing by surface in Calgary: residential concrete driveway (standard double — approximately 5×10 metres), from $95; wood or composite deck (per 100 sq ft), from $65; vinyl or wood siding (bungalow exterior), from $145; fence (per 25 linear feet), from $45; interlocking paver patio, from $85 per 100 sq ft. Combined bookings (driveway + deck + fence same visit) reduce per-item cost.

Does Calgary sand on roads damage my driveway and should I wash it off?

Yes to both. Calgary uses sand (not salt) as the primary road traction material in winter, resulting in significant sand accumulation on driveways, walkways, and garage floors through spring. This sand is abrasive — tracked into the home it scratches hardwood and LVP flooring; left on the driveway, it abrades the concrete surface when driven and walked over. Spring power washing or sweeping to remove accumulated road sand is worthwhile maintenance. The City of Calgary's street sweeping program addresses arterial roads, but residential driveways are the homeowner's responsibility.

Power Washing Calgary | Steve Balakshii

Best timing in Calgary

Spring power washing — typically May through June — addresses the accumulation of road sand, winter salt (used sparingly in Calgary, but ice patches get salted), and general grime from snow and freeze-thaw cycles. This is the most popular window and the most useful: cleaning in spring prepares surfaces for staining, painting, or just looking good through the summer.

Fall power washing (August to September) makes sense before applying a fresh coat of deck stain or fence sealant, or before closing up a deck for winter. Washing and staining in the same visit is efficient: wash in the morning, allow the wood to dry through the afternoon (Calgary's low humidity accelerates drying), and stain in the late afternoon or the following morning.

Avoid washing when frost is forecast within 48 hours. Water that enters wood checks, brick mortar joints, or concrete cracks freezes and expands, widening existing damage.

Pressure by surface: what to use in Calgary

Surface	Pressure	Tip	Notes
Concrete driveway	2,000–3,000 PSI	15° or 25°	Pre-treat oil stains with degreaser
Wood deck	500–800 PSI	40° fan	With the grain; avoid zero-degree tip
Composite decking	≤1,500 PSI	40° fan	Check manufacturer spec — many warranty voids
Vinyl siding	800–1,200 PSI	40° fan	Top-down; avoid spraying upward under panels
Wood siding	600–800 PSI	40° fan	Low pressure; high pressure raises wood grain
Brick (aged mortar)	1,000–1,500 PSI	25°	Avoid direct spray into mortar joints
Interlocking pavers	1,500–2,000 PSI	25°	Re-sand joints after washing
Fencing (wood)	600–1,000 PSI	40°	With the grain; allow full dry before staining

Concrete driveway cleaning in Calgary

Calgary driveways accumulate road sand (used extensively for winter traction) through the winter months. By spring, a typical driveway can have a visible layer of sand and grit. This is more than cosmetic — the abrasive sand scratches concrete sealant and, when tracked inside, scratches hardwood and LVP flooring.

For oil stains from vehicle drips — common in Calgary driveways — apply a concrete degreaser (available at Canadian Tire or Home Depot) and allow it to dwell for 10 to 15 minutes before power washing. The degreaser breaks the hydrocarbon bond; the power washer rinses it away. Without pre-treatment, power washing alone moves oil stains without removing them.

Calgary concrete driveways (most post-1985 construction uses 32 MPa or higher compressive strength concrete) handle 3,000 PSI washing well. Older driveways from the 1960s and 1970s with lower-strength concrete or visible freeze-thaw spalling should be washed at lower pressure — 2,000 PSI maximum — to avoid dislodging aggregate from the surface.

Power washing pricing in Calgary

Scope	Starting price
Double garage driveway (approx 5×10 m)	From $95
Wood or composite deck (per 100 sq ft)	From $65
Wood fence (per 25 linear feet)	From $45
Bungalow exterior siding wash	From $145
Interlocking paver patio (per 100 sq ft)	From $85
Driveway + deck + fence combo (same visit)	From $225

Power washing in Calgary

Tell us what surfaces need cleaning and the approximate square footage — most residential power washing jobs are completed in half a day.

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