What are the best practices for stucco application on a multi-storey Ottawa home?

Stucco application on a multi-storey Ottawa home introduces challenges that single-storey work doesn't — scaffolding logistics, increased wind exposure, more complex water management, and the physical reality of applying heavy material at height. Getting it right requires both technical knowledge and careful planning.

Scaffolding and Access

Proper scaffolding is non-negotiable for multi-storey stucco work. In Ottawa, this means:

• Full frame scaffolding (not just ladders or pump jacks) for anything above two storeys. This gives the applicator a stable, level platform to maintain consistent coat thickness and texture — impossible to achieve while balancing on a ladder.
• Scaffolding costs run $2,000 to $5,000 for a typical Ottawa two-and-a-half or three-storey home, depending on the perimeter and how long it stays up. The scaffold needs to remain in place through the entire application and curing process — usually three to four weeks.
• Ottawa's building department requires a permit for scaffolding over public sidewalks, which is common on homes in the Glebe, Centretown, and Old Ottawa South where setbacks are minimal.

Water Management at Height

This is where multi-storey stucco in Ottawa gets serious:

• Control joints at every floor line: The Ontario Building Code requires horizontal control joints at each floor level to accommodate building movement. These joints interrupt the stucco surface and redirect water outward via Z-flashing underneath.
• Vertical control joints every 5.4 metres maximum and at all changes in substrate or framing material. A three-storey Ottawa home might need six to ten control joints total — each one properly flashed and sealed.
• Kickout flashing where roof lines meet walls: Multi-storey homes typically have roof-to-wall intersections at the second storey. Without kickout flashings at these points, massive amounts of water channel behind the stucco. This is the single most common stucco failure point on Ottawa multi-storey homes.

Application Sequence

• Work from top to bottom: Always start at the highest point and work down. This prevents drips and splatter from marring finished lower sections. Each coat — scratch, brown, and finish — follows this top-down sequence.
• Maintain wet edges: On a large multi-storey wall, the applicator must keep a wet edge moving to avoid cold joints (visible lines where fresh stucco meets partially cured stucco). This is harder on tall walls because the area is larger — experienced Ottawa crews use two applicators working in tandem on multi-storey sections.
• Wind protection: Upper-storey walls catch significantly more wind than ground level. Ottawa's prevailing northwest winds can dry stucco too quickly on exposed upper walls, causing shrinkage cracks. Windscreens on the scaffolding help, and some Ottawa contractors schedule upper-floor work for calmer days.

For a typical two-and-a-half to three-storey Ottawa home (roughly 2,500 to 3,500 square feet of wall area), a full three-coat stucco application runs $25,000 to $45,000, including scaffolding, flashing, and control joints. The premium over a single-storey home reflects the scaffolding cost, slower production at height, and the additional flashing details that multi-storey assemblies demand.

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