How to Install House Numbers on Brick Without Drilling
Posted on August 12, 2026 by Plate Style
Drilling into brick is not hard. Undoing it is. A hole in a brick face is permanent, and if you are renting, restoring an older house, or simply not sure the numbers belong there yet, you want a method that comes off without leaving a scar.
The honest version: adhesive on brick works, but only with the right kind of sign and the right kind of prep. Brick is porous, uneven and thermally busy — it moves more than you would think. Most failed installs are not adhesive failures, they are surface failures.
Why loose numbers fail on brick and plaques do not
This is the single thing worth understanding before you buy anything.
Individual numerals stuck straight onto brick have to bond to whatever is directly behind each one. Brick faces are rough, slightly cupped, and often dusty in a way that never fully cleans off. Half of a numeral's back may be touching air. Mortar joints are worse — they are recessed, so anything that spans one is bridging a gap.
A plaque changes the problem completely. The numbers are already fixed to a flat backer, and you are bonding one rigid panel to the wall instead of four fiddly shapes. You can put adhesive exactly where the brick is flat and proud, and ignore the joints entirely.
If you are set on individual numbers on bare brick without drilling, be realistic: it is the hardest version of this job and the one most likely to be back in your hand after a winter.
What actually holds on brick
Construction adhesive — the reliable one
A polyurethane or hybrid-polymer construction adhesive (the cartridge kind, in a caulk gun) is what actually belongs on masonry. It gap-fills, which matters on a surface that is never flat, it stays flexible through freeze and thaw, and it is rated for exterior use.
The trade-off is that it is semi-permanent. It will come off, but with effort and possibly with a little surface brick.
Exterior VHB tape — only on smooth, flat brick
Double-sided acrylic foam tape is excellent on glass, painted metal and smooth composite. On brick it is a gamble, because the tape needs continuous contact and brick rarely gives it. It can work on smooth-faced modern brick or on painted brickwork. On old, sandy, textured brick it will let go.
If you use tape, use it on a plaque, not on loose numerals, and add a bead of adhesive in the middle as insurance.
Mortar-joint anchors — the honest "reversible" option
Worth saying plainly, because it is often the right answer: if you drill, drill the mortar, not the brick. Mortar is softer, faster to drill, and a hole in it can be repointed invisibly in ten minutes. Most "no drilling" advice exists to avoid damaging brick faces — going into the joint sidesteps that entirely.
For a renter this is usually acceptable where a brick hole is not.
Step by step, adhesive method
- Pick your spot in daylight, from the street. Walk to where a car would stop and check the sign is not behind a shrub, a porch post or the mailbox. Numbers you cannot see from the road fail the one job they have.
- Find the flattest run of brick. Hold the plaque up and look along it at a low angle. You want the backer touching brick faces, not spanning a recessed joint through its middle.
- Clean hard. A stiff brush, then a wipe with isopropyl alcohol, then let it dry completely. Brick holds dust in its pores; a casual wipe leaves a release layer behind. Do not use soap — the residue is worse than the dust.
- Check it is dry. Not damp-looking — dry. Masonry that has rained in the last day is still wet inside. Give it a warm day.
- Apply adhesive in dots, not a bead. Five or six generous dots — corners and center — sized so they squash out to about a coin when pressed. A continuous perimeter bead traps moisture behind the sign, which is how staining starts.
- Press and hold, then support it. Thirty seconds of firm pressure, then tape it in place with painter's tape or prop it with a length of timber. Construction adhesive needs hours, not minutes, and gravity wins arguments.
- Leave it 24 hours before touching it. Longer if it is cold. Most adhesives lose a lot of strength below about 50 °F while curing.
Temperature is the part people skip
Installing on a cold, damp autumn afternoon is the most common reason a sign is on the ground by spring. Pick a dry day above 50 °F, ideally with a few more behind it.
How to take it off later
This is the whole reason you chose adhesive, so it is worth knowing before you commit.
- Warm it. A hairdryer or heat gun on low, worked across the sign, softens most adhesives considerably.
- Cut behind it. Braided fishing line or a thin guitar string, sawed side to side behind the panel, gets through the dots without prying.
- Never lever against the brick. A screwdriver under the edge will take a chip of brick face with it, which is exactly the damage you were avoiding.
- Remove residue with an adhesive remover made for masonry, and test it somewhere hidden first — some products lighten brick.
Get the size right while you are at it
A sign that is bonded beautifully and too small to read has not solved anything. Most US jurisdictions adopt the International Fire Code, which asks for numerals at least 4 inches tall with a ½-inch stroke, contrasting with their background and legible from the street. Many towns require more, and houses set well back from the road often need numbers at the driveway too.
We go through the numbers properly in house number size requirements. If your wall is siding rather than masonry, that is a different job with different failure modes — see installing on vinyl siding.
Frequently asked
Will Command strips hold house numbers on brick?
No. They are designed for smooth indoor surfaces and release by stretching, which needs a clean uniform bond. On exterior brick they fail quickly, and usually in the first cold snap.
Can I use silicone sealant instead of construction adhesive?
You can, and it holds reasonably on masonry, but it stays rubbery and lets a light sign shift in wind. It is also harder to clean off later than an adhesive designed to be cut through.
What about painted brick?
Easier, because the surface is sealed and flatter. Tape becomes a genuine option. The risk shifts to the paint itself — if the paint lets go of the brick, everything comes with it.
Is drilling into mortar really acceptable in a rental?
Usually more acceptable than drilling brick, but ask. A repointed joint is invisible and cheap to fix; a drilled brick face is not.
Our address plaques are cut from acrylic with the numerals raised on a flat backer, which is the shape that makes an adhesive install on masonry realistic. See them in address signs.