Installing the Ring Battery Doorbell Pro on a curved arched doorway trim requires a custom mounting approach because the flat factory bracket cannot sit flush against a concave or convex surface. The fastest Ring Battery Doorbell Pro arched doorway install method uses a contoured shim — a 3D-printed wedge, a hand-carved cedar block, or two stacked corner kits — that fills the gap between the doorbell's flat back plate and the curve of your trim. This 2026 guide walks through measuring the arch radius, choosing the right shim material, drilling into stucco, brick, or fiber-cement trim, and weatherproofing the seam so the battery compartment stays dry through every season.
Why Arched and Curved Trim Defeats the Stock Bracket
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The Ring Battery Doorbell Pro ships with a flat back plate designed for standard rectangular door frames. When you press that plate against a concave (inward-curved) brick arch or a convex (outward-curved) Victorian molding, only the top and bottom edges make contact. That gap — usually 3 to 9 millimeters — does three bad things: it lets water creep behind the device, it makes the screws torque the housing every time someone presses the button, and it tilts the radar field high or low so motion alerts trigger on tree branches instead of visitors.
The fix is not to over-tighten the screws. Bowing the polycarbonate plate cracks the radar antenna inside within a few months. Instead, you fill the gap with a rigid shim that matches the trim's curvature, then bond it to the trim before you ever drive a screw.
Tools and Parts Checklist
Before you start your Ring Battery Doorbell Pro arched doorway install, gather:
- The doorbell, its security screw, and the Torx-style bit included in the box
- Ring's wedge/corner kit (sold separately, around $10) — gives you 15° and 30° angled blocks
- A flexible curve gauge or a 12-inch strip of solder wire to trace the arch profile
- Exterior-grade construction adhesive (Loctite PL Premium or 3M 5200)
- A 3/16" masonry bit if your trim is brick, stucco, or fiber cement; a 1/8" wood bit otherwise
- Paintable silicone sealant in a color that matches your trim
- A small block of cedar, PVC trim board, or a 3D-printed PETG wedge for the shim itself
Step 1: Measure the Arch Profile
Bend a piece of solder wire or a flexible plastic ruler against the trim at the exact height where the doorbell will sit — typically 48 inches above the threshold. Lay the bent wire on a piece of paper, trace the curve, and measure the maximum gap between the chord (a straight line between the doorbell's screw holes) and the arc. That maximum gap is the thickness your shim needs at its center.
A concave arch needs a shim that's thickest in the middle; a convex molding needs one that's thickest at the edges. Most Tudor, Spanish, and Craftsman arches fall between 4 mm and 8 mm of deflection across the doorbell's 5.1-inch height.
Step 2: Build or Buy the Shim
You have three workable shim options:
Ring Corner Kit, modified. The 15° wedge in Ring's official kit can be carved with a utility knife to roughly match a shallow arch. This is the cheapest path but only works for deflections under 5 mm.
3D-printed PETG wedge. Search Printables or Thingiverse for "Ring Battery Pro arch shim" and adjust the radius parameter to match your measurement. PETG resists UV and won't warp in summer heat the way PLA does.
Hand-cut cedar or PVC trim block. Cut a rectangle slightly larger than the doorbell's footprint (2.4" × 5.2"), then sand or rasp the back to match the arch. Prime and paint it before mounting so the edges don't wick water.
Step 3: Mark and Drill
Hold the doorbell against the shim and the shim against the trim. Use a level — the Battery Doorbell Pro's radar motion zones assume the device is plumb, and even a 5° tilt will skew detection toward the sky or the ground. Mark the two screw holes with a pencil through the back plate.
For brick or stucco, drill with the 3/16" masonry bit on hammer mode and insert the plastic anchors that come with the doorbell. For wood trim, pre-drill at 1/8" so you don't split the cedar shim when you drive the screws.
Step 4: Seal, Mount, and Test
Run a thin bead of construction adhesive on the back of the shim before pressing it against the trim. This stops the shim from rotating when someone leans on the doorbell. Drive both screws snug but not tight — the polycarbonate back plate should sit flat against the shim without flexing.
Pop the doorbell onto the bracket, install the security screw, and open the Ring app. Run a motion test by walking across your porch at a normal pace. If the device misses you or triggers on the street, adjust the radar zones in the app rather than re-aiming the hardware. Finally, run a thin bead of paintable silicone along the top and sides of the shim — never the bottom, since condensation needs a drainage path.
Companion Cameras for Full Porch Coverage
The Battery Doorbell Pro covers a 150° vertical field, which is excellent for visitors at the door but blind to anyone approaching from the side of the porch, the driveway, or the back gate. Most readers who finish this install also add one or two outdoor cameras to close those gaps. Here's how the strongest 2026 companion options compare:
| Camera | Resolution | Battery / Power | Subscription? | Best For |
|---|---|---|---|---|
| Blink Outdoor 4 XR (4-cam) | 1080p HDR | 2 years AA lithium | No (local via Sync 2) | Whole-house perimeter |
| Blink Outdoor 4 (single) | 1080p HDR | 2 years AA lithium | No (local via Sync 2) | Single side-porch angle |
| Blink Outdoor 2K+ | 2K HDR | 2 years AA lithium | No (local via Sync 2) | Wider porches, sharper night footage |
| aosu T2 Pro | 3K dual-lens | Built-in rechargeable | No (microSD up to 256 GB) | License plate detail, no subscription |
Blink Outdoor 4 XR Wireless Camera (4-Pack)
If your porch wraps around the house or you also need coverage at the garage and back door, the four-camera XR kit is the lowest cost-per-angle in the Blink lineup. The XR variant doubles wireless range over the standard Outdoor 4, which matters when one mounting point sits on the far side of a stucco wall or detached garage. Battery life is the same two-year claim using included AA lithium cells. Pair with the Sync Module 2 (included) so clips save locally to USB instead of pushing every event to the cloud. Check current price on Amazon.
Blink Outdoor 4 Wireless Smart Security Camera
For a single companion camera aimed at the side of the porch, the standard Outdoor 4 is the sweet spot. It shares the Ring/Blink ecosystem, so notifications surface in the same app workflow as your doorbell, and the person-detection update introduced in late 2024 cut false alerts from headlight glare dramatically. Mount it at 8-9 feet with a 30° downward tilt to catch faces, not the tops of heads. Check current price on Amazon.
aosu T2 Pro Wireless Outdoor Security Camera
If you want a higher-resolution sidekick that isn't locked to the Ring/Blink ecosystem, the aosu T2 Pro's 3K dual-lens setup gives you a wide view plus a telephoto channel for license plate captures from the curb. It runs without a subscription — local storage on a microSD card up to 256 GB — which is appealing if you'd rather not stack another monthly fee on top of Ring Protect. Color night vision is usable down to about 0.05 lux. Check current price on Amazon.
Blink Outdoor 2K+ Wireless Smart Security Camera
The 2K+ variant is the newest Blink in 2026 and is the right pick if you want noticeably crisper footage than the Outdoor 4 without leaving the Sync Module 2 ecosystem. The bump to a 2K sensor matters most at night and at the edges of frame — perfect for a wider porch where the camera mounts further from the action. Check current price on Amazon.
Weatherproofing the Gap (Don't Skip This)
Arched stone, stucco, and brick trim are porous, and capillary action will wick water up behind your shim during sideways rain. Two extra steps add years to any Ring Battery Doorbell Pro arched doorway install: first, prime the back of any wood shim with an exterior oil primer before painting — latex over bare cedar will peel within 18 months. Second, when you run the final silicone bead, tool it with a wet finger so the seam slopes away from the device. A flat bead collects water; a tapered bead sheds it.
If you live somewhere with hard freezes, check the silicone every spring and re-apply where you see hairline cracks. We have a fuller walkthrough in our smart doorbell weatherproofing guide.
Troubleshooting Common Install Problems
The doorbell rocks when pressed. Your shim isn't fully bonded. Pull it down, sand the contact face flat, and re-adhere with more construction adhesive.
Motion alerts trigger on the street. The device is tilted forward. Add a 5-10° wedge behind the bottom of the shim or use Ring's 15° downward corner block.
Wi-Fi signal drops near the doorbell. Brick and stucco arches attenuate 2.4 GHz badly. A mesh node or the Ring Range Extender solves this for under $30. See our Ring Wi-Fi troubleshooting guide for full diagnostics.
Frequently Asked Questions
Can I install the Ring Battery Doorbell Pro on a brick arch without drilling?
Yes, but only as a temporary install. Use a no-drill brick clip rated for 4+ pounds and pair it with VHB tape behind the shim. This survives a season or two but isn't permanent — the adhesive softens above 90°F. For long-term mounting, the masonry-drill approach in step 3 is the right answer.
Will the radar motion detection still work through a shim?
Yes. The 24 GHz radar in the Battery Doorbell Pro passes cleanly through wood, PVC, PETG, and most plastics under 20 mm thick. Avoid metal shims or aluminum-backed flashing — those block the radar entirely and reduce you to PIR-only detection.
How thick can my shim be before the security screw stops engaging?
The included security screw bites about 12 mm into the mounting surface. If your shim plus trim depth exceeds 8 mm, swap to a longer M3 stainless screw from a hardware store. Keep the head shape identical so the included Torx-style bit still works.
Does an arched install void the Ring warranty?
Using a third-party shim doesn't void the warranty as long as you don't modify the doorbell itself. Drilling into the housing, cutting the back plate, or repainting the front cover does void coverage. Ring's 2026 warranty terms cover hardware defects for one year regardless of mounting method.
What's the best mounting height for a doorbell on an arched entryway?
Mount the lens 48 inches above the threshold. Arched entryways tempt installers to center the doorbell visually in the arch, which can push it to 60+ inches — high enough that the camera looks down at the top of visitors' heads instead of their faces. Stick with 48 inches and add the 15° downward wedge if your porch is shallow.
Can I use a Ring Battery Doorbell Pro with a curved Victorian molding?
Yes. Convex moldings are actually easier than concave arches because you only need a shim with two thin edges and a thick center. A hand-cut PVC trim block sanded to a gentle curve works well. Paint it to match the molding color before you mount the doorbell.
Do I need a Ring Protect subscription after this install?
No. The doorbell records live snapshots and sends motion alerts without a subscription, but you lose access to recorded video history. If you've added the companion cameras above, decide whether you'd rather pay one Ring Protect fee or use the aosu T2 Pro's free local storage to avoid the subscription entirely. Our Ring Protect vs. local storage comparison breaks down the math for 2026 pricing.
Key Takeaways
- Choosing the right Ring Battery Doorbell Pro arched doorway install means matching capacity and output ports to your actual devices
- Always check actual watt-hours (Wh), not just watts — runtime depends on Wh, not peak output
- Also covers: install Ring doorbell curved trim
- Also covers: Ring Pro arched door frame
- Also covers: mounting Ring doorbell on arch
- Compare price-per-Wh across models to find the best value for your budget