Grinding old mortar out of brick makes fine silica dust, and the federal rule is specific about it. A tuckpointing grinder should have a shroud and a dust collection system, and the crew should wear respirators. Dry sweeping that exposes workers is not allowed. Expect noise and some dust even with good control, so ask your contractor how they collect it, how they clean up, and what you should do with windows, cars and play areas.
If you have never had your building tuckpointed, the dust is the part nobody warns you about. Here is what the rules say about tuckpointing dust collection, what a good crew does, and how to get your building ready.
What does the federal rule say about tuckpointing dust?
When a crew grinds mortar out of joints, it throws silica dust, and OSHA regulates it. Its silica standard sets a permissible exposure limit of 50 micrograms per cubic meter over an 8-hour day, and it lists handheld grinders used for mortar removal by name (OSHA).
For tuckpointing, that means a grinder with a commercially available shroud and a dust collection system. The standard spells out the airflow (25 cubic feet per minute per inch of wheel diameter) and a filter that is 99% efficient. Crews wear respirators, and the type depends on how many hours per shift they grind. Dry sweeping or dry brushing that could expose workers to the dust is not allowed (OSHA).
This rule protects the workers first. It also tells you how a serious crew operates: shrouded grinder, vacuum attached, no one grinding bare. If you see a bare blade throwing a cloud, you are watching a crew that is skipping the rules. Our list of tuckpointing mistakes that cost owners twice includes this one.
What dust should you still expect?
A shroud and vacuum cut the dust a great deal. They do not make a grinding job silent or spotless. Expect these:
- Noise from the grinders and the vacuums, for as long as the grinding phase lasts.
- Some dust around the wall, on the scaffolding and on the ground below.
- Debris from the old mortar, which has to be collected, bagged and hauled, not swept into the gangway.
- Fine dust left on surfaces near the work, which a good crew cleans up without dry sweeping.
How long the grinding phase lasts depends on the size of the wall, the depth of the joints and the crew. We do not quote days on a blog. See how long tuckpointing takes for what drives the schedule, and how deep old mortar should be ground out for why you do not want the crew rushing it.
On Chicago two-flats and three-flats, the front wall often sits right at the sidewalk, and the rear wall faces a gangway or a neighbor's window. Dust on a car parked below, or coming through a window left open upstairs, is a common complaint. It is avoidable with a little notice and some prep.
How should you prepare your building?
Ask the contractor, then do the small things that make the biggest difference.
- Ask how they collect dust and what grinder and vacuum they use.
- Ask how they clean the work area each day and what happens to the debris.
- Close windows on the wall being worked, and tell upstairs tenants the day before.
- Move cars, grills, outdoor furniture and kids' toys away from the wall and below the scaffolding.
- Bring pets inside, and keep children and anyone with breathing trouble away from the work area.
- If scaffolding or a debris container will sit on the sidewalk or alley, ask who gets the separate public way permit from the Chicago Department of Transportation (City of Chicago).
Two more flags. If your building was built before 1978 and the brick is painted, the EPA requires paid crews that disturb painted surfaces to be lead-safe certified (EPA). If the building is a designated landmark or proposed landmark, the City says dust control, including a possible air quality permit for masonry grinding, applies regardless (City of Chicago). Confirm either with the Department of Buildings. For what happens end to end, read the Chicago tuckpointing guide, and if you want a crew that runs the job this way, see our tuckpointing service.
Common questions
Grinding old mortar does make fine dust, which is why the federal silica rule requires a shroud, dust collection and respirators. Expect some dust and noise even with good control. Ask your contractor how they collect and clean up.
Under OSHA's silica standard, handheld grinders used to remove mortar need a commercially available shroud and a dust collection system with a high efficiency filter, and workers wear respirators. Dry sweeping that could expose workers is not allowed.
Yes, on the wall being worked, and tell upstairs tenants the day before. Move cars, grills and toys away from the wall, and keep children, pets and anyone with breathing problems out of the work area.
Sources
- OSHA: 29 CFR 1926.1153: Respirable Crystalline Silica in Construction
- City of Chicago: Guide to Building Permits: What Types of Work Do Not Require a Building Permit?
- U.S. Environmental Protection Agency: Lead Renovation, Repair and Painting Program
Facts last checked: October 7, 2026.
This article explains general rules and common situations in Chicago. It is not legal advice, and City rules change. For a specific property, check with the Chicago Department of Buildings or a licensed professional.