Stucco vs Hardie in Calgary: what each needs.

Stucco is a continuous textured cement-based surface with no visible seams, applied over lath. Calgary's stucco stock is largely acrylic stucco from the 1975–1998 era, and it dominates the northwest and much of the established southwest.

Fibre cement comes in planks with visible butt joints roughly every twelve feet, and it sounds dense and solid when tapped rather than hollow. It became the default in Calgary's newer communities from the mid-2000s onward — most of Evanston, Sage Hill, Auburn Bay, Mahogany and Cranston.

Stucco cracks. Hairline cracking is normal in Calgary because the wall behind it moves through freeze-thaw and our clay soils shift. What is not normal is a crack you can fit a fingernail into, which usually indicates settlement rather than surface stress and should be looked at before painting.

Correct stucco work means washing to remove chalking, routing and filling cracks with a flexible elastomeric sealant, patching missing texture to match, priming bare patches with a masonry primer, and finishing with a breathable coating. Sealing stucco with a non-breathable film traps moisture in the wall assembly and causes far worse damage than the original cracks.

Hardie arrives primed or pre-finished and is the easiest cladding in Calgary to repaint well. The work is washing, scraping any failed factory finish, caulking butt joints and penetrations with a paintable exterior sealant, spot-priming exposed fibre cement, and applying two coats of a quality 100% acrylic exterior.

The two things that go wrong: painting over a pre-finished ColorPlus surface without proper cleaning and adhesion testing, and using a sealant at butt joints where the manufacturer's install detail actually calls for a flashing behind the joint instead. Neither is expensive to get right — both are expensive to fix later.

In Calgary, repainting stucco typically runs higher per square foot than fibre cement because of crack repair, texture patching and the extra material the texture consumes. Fibre cement is the cheaper and faster of the two on nearly every house.

Lifespan is the reverse of what people assume: a properly coated stucco wall can go seven to ten years, and well-prepped fibre cement eight to twelve. The variable in both cases is prep quality, not the cladding itself.