Peephole Installation: See Who's There Without Opening Up
Opening the door to see who's knocking is exactly what you don't want to do with a stranger or an unexpected visitor on the porch. A peephole is a simple, low-tech way to check first, but drilling a clean hole through a solid or metal door, at the right height for everyone in the house, is trickier than it looks.
A peephole, or door viewer, is a wide-angle lens set into the door so you can see the porch without opening up, and it remains one of the simplest security upgrades there is. The two basic types are a traditional optical viewer you look through directly and a digital peephole with a small screen and camera, which is easier for kids, shorter adults, or anyone who can't lean in to a tiny lens. The install is precise drilling: the hole has to be the right diameter and dead level, and the technique differs between a solid wood door and a hollow or metal one so you don't crack, splinter, or deform the door. A pro also sets the height so it works for the people who actually use it, and on a digital model handles the mounting and the battery or power. It's a quick job, but a clean, correctly placed hole is what makes the difference.
How the job is done
- 1
Choose an optical or digital viewer
We help you pick between a classic look-through viewer and a digital peephole with a screen. Digital models suit households where leaning into a small lens is hard, like for kids or shorter family members.
- 2
Set the right height and location
We mark the spot at a height that works for the people who'll use it, centered on a usable part of the door and clear of any window or decorative panel.
- 3
Match the technique to the door
We confirm whether the door is solid wood, hollow-core, or metal, because each is drilled differently to avoid splintering wood or deforming a metal skin.
- 4
Drill a clean, level hole
Using the correct bit size and a steady, square approach, we drill the viewer hole straight through so the lens seats flush and looks finished on both sides.
- 5
Install and seat the viewer
The two halves of the viewer thread together snugly from inside and outside, or the digital unit is mounted with its camera aligned, so the view is clear and the fit is tight.
- 6
Check the view and finish
We look through or power up the viewer to confirm a clear, wide view of the porch, and on a digital model we set up the battery or power and the screen before finishing.
What a pro checks
- A digital peephole with a screen is easier for children, shorter adults, or anyone who struggles to lean into a small lens.
- Solid wood, hollow-core, and metal doors each require a different drilling approach to avoid splintering or denting.
- Hole diameter has to match the viewer; an oversized or off-center hole leaves the lens loose or the view blocked.
- Mounting height should suit the people who actually use the door, not a one-size guess.
- A wide-angle viewer covers more of the porch, but it should still be positioned to see someone standing right at the door.
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Frequently asked questions
What's the difference between a regular and a digital peephole?
A regular viewer is a lens you look through directly, while a digital peephole has a small camera and screen, sometimes with recording. The digital type is easier to use for kids or shorter adults and gives a larger, clearer image.
Can a peephole be installed in a metal door?
Yes. Metal doors just need the right drilling technique and bit so the skin isn't deformed and the viewer seats cleanly. We confirm the door type before drilling.
What height should a peephole be?
It's set for the people who use the door, often a bit lower than the old standard so it works for more of the household. We mark a height that suits your family before drilling.
Is a peephole still worth it if I might get a video doorbell?
Yes. A peephole works instantly with no app, battery worries, or Wi-Fi, so it's a reliable backup and a simple upgrade on its own. Many homes have both, and we can advise on what fits your door and goals.
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