Written by Stucco Champions — Southern California’s Authority on Exterior Plastering.
How to Cut Through Stucco: A Comprehensive Tool Guide
Cutting into stucco is a necessary evil for many home improvement projects, from installing a new window to running an electrical conduit. But stucco is not drywall. It is a rigid, 7/8" thick layer of Portland cement reinforced with steel wire. If you attack it with the wrong tool, you will burn out your motor, dull your blade, and crack the surrounding wall.
This guide breaks down the professional tools required to cut masonry cleanly, safely, and efficiently.
1. The Powerhouse: Angle Grinder + Diamond Blade
For 90% of cuts, the 4.5" Angle Grinder is the tool of choice.
The Blade: You must use a Segmented Diamond Blade. The segments allow for cooling and dust ejection. A continuous rim blade (for tile) will overheat and warp.
Best For: Long straight lines, square cutouts for electrical boxes, and heavy demolition.
2. The Precision Tool: Oscillating Multi-Tool
When you need a surgical cut without over-cutting the corners, the Multi-Tool is essential.
The Blade: Use a Carbide Grit or Diamond Grit blade. Standard wood blades will lose their teeth in seconds against cement.
Best For: Plunge cuts, tight corners where a round grinder blade would cut too far, and detail work.
3. The Hole Maker: Diamond Hole Saw
If you are installing a pipe, dryer vent, or hose bib, do not try to cut a circle with a grinder.
The Tool: A drill-mounted Diamond Core Bit.
Technique: Use a spray bottle to keep the cut wet. This cools the diamonds and prevents the bit from burning up. Go slow and let the grit do the work.
Cutting stucco releases Silica Dust, which is a severe lung hazard (and illegal to release in large quantities).
Protocol: Always wear an N95 respirator. Whenever possible, use a dust shroud connected to a HEPA vacuum, or have a helper spray a fine mist of water on the blade to suppress the cloud.
4. Cutting the Wire (Lath)
Once you cut the cement, you will hit the steel mesh.
The Problem: Spinning blades can snag the wire and rip it out of the wall, causing massive damage.
The Fix: Cut the cement first, then stop. Use Aviation Snips (tin snips) to manually cut the wire mesh. This ensures a clean edge and prevents the lath from unraveling inside the wall.
Conclusion: Respect the Material
Stucco is rock. Treat it like rock. Use diamond tooling, manage the dust, and be gentle with the wire lath underneath. By using the right tool for the specific cut, you can open a wall without destroying the structural integrity of the home.
Last week, we shared LaHabra Stucco Color Charts. If you are patching the hole you just cut, you'll need to match the color.
Need stucco repair in Southern California? Stucco Champions proudly serves homeowners throughout Orange County, Los Angeles, Riverside, and San Bernardino counties. Check out our Service Areas page to see all the cities we cover.