Why Does Stucco Crack?

Several factors can cause stucco to develop cracks:

• Weather stress – Freeze-thaw cycles in cold climates expand small cracks.
• Foundation settling – Homes naturally shift, stressing exterior walls.
• Improper installation – Thin coats or poor preparation can weaken stucco.
• Moisture issues – Water seeping behind stucco can cause bulging or crumbling.
• Aging – Stucco, like all materials, wears down over decades.

DIY Stucco Crack Repair (For Small Cracks Only)

Hairline cracks under ⅛ inch wide can sometimes be handled by homeowners with the right materials.

1. Clean the area – Use a stiff brush to remove dirt and debris from the crack.
2. Prep the crack – Use a chisel or utility knife to widen the crack slightly into a “V” shape so the filler adheres better.
3. Apply patching compound – Use premixed stucco patch or acrylic caulk designed for stucco. Smooth with a putty knife.
4. Texture to match – Dab with a sponge, brush, or trowel to blend with surrounding stucco.
5. Paint the repair – Once dry, paint over the patch with a matching exterior paint.

Pro Tip: Always check for signs of deeper issues like moisture or large cracks. DIY patches are only a short-term solution if there’s a bigger underlying problem.

When to Call a Professional

Not all cracks are equal. Call a professional stucco contractor if you notice:

• Cracks wider than ⅛ inch
• Long cracks around doors, windows, or corners
• Bulging, soft, or discolored stucco
• Chunks of stucco falling off
• Water stains or mold growth

A professional can identify hidden issues like trapped moisture, damaged lath, or foundation problems. They’ll also match texture and color so repairs blend seamlessly — something that’s hard to achieve with a DIY kit.

Benefits of Professional Stucco Repair

• Correct diagnosis of underlying issues
• Long-lasting repairs that prevent future cracking
• Seamless finish that restores curb appeal
• Protection against costly water damage
• Peace of mind knowing the repair is done right

Protect Your Home’s Exterior

Fixing cracked stucco early saves money and protects your home. While small cracks may be manageable as a weekend project, larger or recurring damage is best left to the experts.