Drilling Into Brick to Mount Cameras, Lights and Dishes: Hit the Mortar, Not the Brick

Before you start drilling into brick to mount a camera, a porch light, a satellite dish or a hose reel, make one decision first: drill into the mortar joint, not the brick face, whenever the load allows. Mortar is the repairable part of a brick wall. A hole in a joint disappears the next time the wall is tuckpointed; a hole in a brick face stays there for the life of the brick.

Paul Lally's Masonry Inc. — brick repair and tuckpointing across Chicago and the suburbs, (708) 448-8866 — patches the aftermath of decades of mounting on Chicagoland brick: abandoned dish brackets, rows of old light-fixture holes, cracked brick faces from oversized sleeve anchors, rust streaks below cheap screws. Almost all of it was avoidable with a few minutes of planning.

This guide covers where to anchor, which anchor to use, how to keep water out, and when an item is heavy enough that a mason should be involved. It is not a substitute for the manufacturer's installation instructions — where a fixture, dish or charger specifies an anchor or a load rating, follow it.

Drilling into brick to mount anything: why the mortar joint comes first

A brick wall has two materials doing different jobs. The brick is the durable, weather-facing unit, designed to last a century or more. The mortar is deliberately softer and weaker — it is meant to absorb movement, crack before the brick does, and be raked out and replaced every few decades. That replacement is what tuckpointing is.

That makes the joint the natural place for a fastener:

• It gets renewed anyway. Every hole in a mortar joint is erased the next time the wall is repointed.
• It drills cleanly. Mortar drills faster, with less risk of spalling a chip off the face.
• It cannot crack a brick. An expanding anchor in a joint pushes against mortar, not against a brittle unit near its edge.
• It hides. A filled hole in a mortar joint is close to invisible. A filled hole in a brick face never quite is — see why brick repairs look different.

Bed joints (the horizontal ones) are usually the better choice over head joints (the short vertical ones): they are continuous, so you can slide a bracket left or right to land the holes, and they give an anchor more mortar to bite into.

When the mortar is the wrong place

Mortar holds an anchor less strongly than solid brick, and old lime-rich mortar in pre-war Chicago buildings holds less still. So the rule bends for:

• Heavy loads — railings, awnings, large dishes, heavy wall units.
• Loads that pull outward or lever — anything with a long arm, anything the wind catches, anything people lean on.
• Deteriorated joints — if the mortar is soft, sandy or recessed, an anchor will not hold in it. That wall needs tuckpointing before it needs a bracket.

For those, the anchor goes into the centre of a solid brick, well away from its edges, or through the masonry to structure behind.

Know what you are drilling into

The same drill and the same anchor behave very differently depending on the wall. Before drilling into brick to mount anything heavier than a house number, work out which of these you have.

Solid masonry

City bungalows, two-flats, greystones and many inner-ring post-war ranches are solid masonry — two or more wythes of brick tied together. Drilling into the outer wythe hits more brick behind it. These walls take heavy anchors well, provided the brick and mortar are sound. Our guide to what is inside your brick wall explains the layers.

Brick veneer

Most outer-suburb homes from the 1970s onward are brick veneer: a single layer of brick, an air space, then sheathing and wood or steel framing. The veneer is held to the frame with thin metal ties designed to carry the veneer's own weight and wind — not the extra leverage of a heavy awning or a railing. Fasteners long enough to cross the cavity can also hit those ties, the water-resistive barrier, or wiring. See brick veneer vs solid masonry for how to tell which you have.

Cored and hollow brick

Most modern face brick is cored — it has holes running through it top to bottom. Drill into the face and you may break into a void after an inch or so. An expanding sleeve anchor in a void has nothing to grip and can split the thin outer shell off the brick. Cored brick wants adhesive anchors with a screen sleeve, or careful placement in the solid web between cores.

Old soft brick

Pre-war Chicago common brick can be soft and porous. It drills easily and holds poorly, and aggressive hammer action can blow a crater out of the face. Go slow, go rotary, and favour adhesive anchors for anything that matters.

Choosing the anchor

Anchor type	Best for	Where it goes	Watch out for
Plastic plugs (wall plugs)	House numbers, small lights, cable clips, light brackets	Mortar joint	Weak in soft or crumbling mortar; UV-degraded plastic fails outdoors over time
Masonry screws (concrete screws)	Cameras, doorbells, light fixtures, hose reels, conduit straps	Mortar joint or solid brick	Exact pilot-hole size matters; overdriving strips the hole
Sleeve anchors	Medium loads — dish brackets, heavier fixtures	Centre of a solid brick	Expansion can crack brick near edges or blow out cored brick
Adhesive (epoxy) anchors	Heavy or critical loads; hollow, cored or soft brick	Solid brick, or cored brick with a screen sleeve	Hole must be cleaned of dust; cure time before loading
Through-bolting to structure	Awnings, large railings, anything heavy on veneer	Through masonry to framing or backup wall	Needs proper detailing so the penetration does not leak

A few principles hold across all of them:

• Match the bit exactly to the anchor manufacturer's specified diameter. A sloppy hole is the commonest reason an anchor spins or pulls out.
• Clean the hole. Blow out the dust — it is the difference between an adhesive anchor that holds and one that does not, and it matters for screws too.
• Respect edge distance. Anchors placed too close to the edge of a brick split it. Stay toward the middle of the unit.
• Use exterior-rated fasteners. Stainless steel or properly coated screws and brackets. More on rust below.

Hammer drill vs rotary drill

A hammer drill pulses the bit forward as it spins, chipping its way through hard material. With a carbide-tipped masonry bit, it is the right tool for most modern brick and for concrete.

A rotary-only setting just spins. It is slower, but it is gentler, and on old soft brick or lime mortar it is often all you need.

Practical guidance:

1. Start without hammer action to seat the bit and keep it from walking across the face.
2. Switch to hammer once the bit is started, on hard modern brick.
3. Stay rotary or light hammer on old soft brick, glazed brick, and near the edge of a unit, where hammer action breaks out chips.
4. Mark depth with tape on the bit so you do not drill farther into a veneer cavity than you need to.

Keep water out: sealing penetrations

Every hole through a brick face is a potential path for water. Brick walls already manage a lot of water — see how water gets through a brick wall — and an unsealed penetration adds to it.

• Seal the fastener holes. A small amount of exterior sealant in the hole before the anchor goes in, or around the fastener head, keeps water from tracking along the screw.
• Slope cable holes downward to the outside. When a camera, doorbell or dish cable passes through the wall, drill so the outside end of the hole is lower than the inside end. Water then drains out, not in.
• Put a drip loop in every cable before it enters the wall, so water runs off the bottom of the loop rather than following the cable into the hole.
• Seal the cable penetration around the cable with a sealant compatible with masonry, inside a proper entry fitting where one is available.
• Do not caulk a mounting block shut on all four sides if the fixture manufacturer calls for drainage at the bottom; trapped water does more harm than a small gap.

Never drill near weep holes or through flashing

On a veneer wall, the weep holes at the bottom course — and above windows and doors — are the exit for water that drains down the cavity. Behind them sits through-wall flashing that collects that water and directs it out. A drill bit through that flashing creates a leak into the wall that nobody will see until the damage shows up inside.

• Keep fasteners well clear of the bottom courses above grade where flashing sits.
• Keep clear of the courses directly above window and door lintels.
• Never fill, caulk or cover a weep hole to mount something over it.

Our guide to weep holes in brick veneer shows where they are and why they matter.

Rust stains from fasteners

Plain zinc-plated screws — the kind that come loose in the box with many fixtures — rust outdoors in Chicago weather within a season or two. The rust washes down the face and leaves orange streaks below every mounting point.

• Use stainless steel fasteners for anything exterior where you can.
• Replace rusted brackets rather than painting over them.
• Existing rust stains usually need a specialist masonry rust cleaner, used carefully; scrubbing with wire brushes or using harsh acids can damage the brick face more than the stain.

Drilling into brick to mount common items: anchor guide and when to call a mason

Item	Where to anchor	Anchor type	When to call a mason
Security camera	Mortar joint	Masonry screws or plastic plugs	Rarely — unless joints are deteriorated
Video doorbell	Mortar joint; wedge or mount plate as supplied	Masonry screws	If it must sit on brick face and you want minimal damage
Light fixture	Mortar joints via junction box or mounting block	Masonry screws	If the box must be recessed into the brick
House numbers	Mortar joint	Plastic plugs, small masonry screws	No
Satellite dish	Solid brick, centre of unit	Sleeve or adhesive anchors per manufacturer	Old dish removal and hole patching
Hose reel	Mortar joints, or solid brick for wall-mount reels	Masonry screws or sleeve anchors	If the wall-mounted reel is heavy and the joints are soft
Awning	Through masonry to structure	Through-bolts or adhesive anchors per manufacturer	Usually — significant wind load, especially on veneer
Railing	Into steps or solid masonry, core-drilled and grouted	Grouted posts or adhesive anchors	Yes — it is a safety item people lean on
Flagpole bracket	Solid brick, centre of unit	Sleeve or adhesive anchors	If the pole is large or the wall is veneer
EV-charger conduit	Mortar joints for straps	Masonry screws with conduit straps	For the wall penetration if it must pass through brick
Christmas-light clips	No holes needed	Brick clips that grip the brick edges	No — skip drilling altogether

Removing old fixtures and patching abandoned holes

Every Chicagoland brick house collects holes: the dish from 2004, the light that got moved, the security camera the last owner took with them. Leaving open holes lets water in and invites freeze-thaw damage around them.

The right patch depends on where the hole is.

1. Remove the old anchor completely if it will come out. Cut off flush anything that will not, and remove rusting steel where possible.
2. Holes in mortar joints: rake the joint back to sound mortar and repoint with mortar matched in colour, sand and hardness to the existing joints. Done well, the patch disappears.
3. Holes in the brick face: fill with a colour-matched masonry repair mortar, tooled to the brick's texture. It will be close, not invisible.
4. Heavily damaged brick — cracked faces, multiple large holes, blown-out cores — is better replaced with a matched brick than patched.
5. Avoid caulk and silicone as hole fillers on a visible face. They never match, they collect dirt, and they fail.

Matching is the hard part. A mortar patch that is too grey, too white or too hard draws the eye and can harm soft old brick. That is the work our brick repair service handles every week.

DIY vs calling a professional

Mounting a camera, doorbell, house numbers or light fixture into mortar joints is reasonable DIY with the right bit, the right anchor and some care.

Call a mason when:

• The item is heavy, cantilevered, or wind-loaded — awnings, railings, big dishes, flagpoles.
• The wall is veneer and the load is more than light.
• The mortar is soft, sandy or recessed — anchors will not hold, and the wall needs tuckpointing anyway.
• You need a neat penetration through brick for conduit or plumbing.
• You are left with rows of old holes or cracked brick faces that need matched repair.
• A railing or anything safety-critical is involved.

For electrical work, including EV chargers and hardwired lights, a qualified electrician handles the wiring; the masonry question is only how the fixture and conduit attach and where any hole goes through the wall.

The Chicagoland context

Chicago-area brick lives through dozens of freeze-thaw cycles every winter. Any hole that lets water into a brick or behind a joint gives that water a place to freeze and expand, so an unsealed mounting hole grows into a spall over a few winters.

The housing stock matters too:

• City bungalows and two-flats are solid masonry, often with soft brick and lime mortar — anchors hold best in sound brick with adhesive, and hammer drilling needs a light touch.
• Greystones have limestone fronts; drilling into stone is a separate conversation, and the brick side and rear walls are usually the better mounting surface.
• Post-war ranches in the inner ring are often solid brick with harder mortar — friendlier to masonry screws.
• Veneer suburbs need respect for the cavity, the ties, the flashing and the weep holes.

Maintenance and prevention

• Check mounting points each spring for loose anchors, rust and cracking around holes.
• Re-seal cable penetrations when the sealant cracks or pulls away.
• Patch holes as soon as a fixture comes down rather than leaving them open over winter.
• Keep joints sound. An anchor is only as good as the mortar around it.

What drives the cost of repairs

When mounting goes wrong, or when old holes need patching, the cost is driven by the number of holes, whether they are in mortar or brick face, how closely mortar colour and brick must be matched, whether brick needs replacing rather than patching, any water damage behind the penetrations, and height and access. We do not quote figures without seeing the wall — a free on-site estimate is the honest answer.

Related services

• Brick repair — patching and matching holes, cracked faces, and damaged units
• Tuckpointing — renewing joints so anchors have something to grip

The bottom line

Drill the mortar, not the brick, whenever the load allows. Use the anchor the wall and the load call for. Seal every hole, keep clear of weep holes and flashing, use stainless fasteners, and bring in a mason when the item is heavy, the wall is veneer, or the joints are already failing.

Paul Lally's Masonry Inc. is a family-owned, insured masonry contractor serving Chicago and the Chicagoland suburbs since 1988 — tuckpointing, brick repair and replacement, chimney repair and rebuilds, lintel replacement, masonry restoration, and waterproofing for residential and commercial properties. Our name is on every job.

Built on Craftsmanship. Backed by Experience. Get a free on-site estimate or call (708) 448-8866.