Snap lock: 1-inch seam
1-Inch Snap Lock Metal Roof Panel for a Low, Clean Seam
The 1-inch snap lock metal roof panel is the lowest seam we form. Our 1.5″ and 1.75″ panels stand tall; this one keeps the ribs short and the roof calm. It suits smaller homes, dormers and bay roofs pitched 3/12 or steeper.
- 20+ years of experience
- Lifetime limited warranty
- Free written estimates
1-inch snap lock specifications
PMRS does not publish a separate sheet for the 1″ panel, so the figures below are typical industry values. We confirm exact widths, gauges and clip details for your project on request.
| Specification | 1″ snap lock |
|---|---|
| Seam height | 1″ |
| Panel width | Typically 12″ to 16″; 16″ is our standard coverage |
| Minimum slope | 3/12 |
| Deck | Solid deck |
| Seam type | Snap seam over concealed clips; no seaming tool |
| Duty | Residential steep slope and small accent roofs |
| Metals | Steel or aluminum; gauge confirmed per project |
| Finishes | PVDF (Kynar 500), crinkle and Tedlar PVF film |
| Finish warranties | From the coil coater, typically 30 years on solid PVDF colors and 20 on metallics |
| Ribs and striations | Optional, to reduce visible oil canning |
| Best for | Dormers, bay windows, steeper porches and smaller homes |
Need numbers for a submittal? Request the 1″ snap lock data and we will send current specs. For a published comparison, open the 1.5″ MD snap lock spec sheet (PDF).
How is the 1-inch panel different from our other snap locks?
Seam height is the whole story. At 1″, the rib sits a third lower than the 1.5″ and three-quarters of an inch lower than the 1.75″. From the street, that reads as fine pinstripes rather than bold ribs.
The lower seam has limits too. It gives water less height to clear before it reaches the joint, and it stiffens the panel less. So it is chosen for steeper, simpler roofs and moderate panel runs.
When a roof needs more, its siblings take over. The 1.5″ snap lock handles mansard and wall transitions. The 1.75″ snap lock handles open framing and higher uplift. All three belong to our snap lock standing seam line.
When is the 1-inch snap lock the right call?
Choose it when proportion matters more than span. These are the jobs where it earns its place.
- Ranch and cottage homes where a tall seam would look oversized
- Dormers, bay windows and entry roofs that accent a different main roof
- Porch roofs pitched 3/12 or steeper that should read as trim, not as a second roof
- Accent roofs and awnings on light commercial storefronts
Skip it for roofs under 3/12, very long runs, open framing or sites with high wind-uplift requirements. Those belong to the 1.75″ snap lock or our mechanical lock panels.
How do we install the 1-inch panel?
It follows our standard snap lock sequence, with a few habits specific to this size.
- Solid decking under every panel, checked for flatness, since flat pans show uneven decking
- High-temperature underlayment over the whole deck, plus a self-adhered layer wherever water concentrates
- Clips at the spacing the panel and wind exposure call for, with floating clips on longer runs
- Trim scaled to the seam, so drip edges and ridge caps do not overpower a low-profile roof
Colors, cost and warranty for the 1-inch panel
Pick any PVDF color from our metal roof color chart, or ask about crinkle and Tedlar finishes. Light colors reflect more of the Texas sun.
Whole-roof pricing starts from our standing seam baseline of $15 per square foot for 24-gauge Galvalume in Kynar 500. Small accent roofs are quoted per job. Our lifetime non-prorated limited warranty covers PMRS standing seam roofs for both material and labor.
1-inch snap lock questions
Is a 1-inch seam strong enough for a whole house?
On a simple roof pitched 3/12 or steeper, it can be. For long runs, high uplift or heavy hail exposure, we usually steer owners to the 1.75″ snap lock or a mechanical lock panel.
Why is there no PMRS spec sheet for the 1-inch panel?
We publish sheets for the 1.5″ and 1.75″ snap locks and our three mechanical locks. For the 1″ panel we send project-specific data on request, so the numbers match the gauge and clip you will actually get.
Can the 1-inch snap lock go on a low-slope porch?
Only if the porch is pitched at 3/12 or more. Flatter porch roofs need a seamed panel such as our 1″ mechanical lock, which is rated to 1/2:12.
Does a 1-inch panel oil can more than taller seams?
Seam height is not the main factor. Panel width, gauge, deck flatness and finish gloss matter more, and optional striations help on any width.
Get Your Free Metal Roof Estimate
Tell us about your roof and a Permanent Metal Roofing Systems specialist will follow up to schedule your free estimate. No pressure, no obligation.
Prefer to talk now? Call (469) 466-2421.
Want a low-profile seam on your roof?
Send us a few photos or your plans. We will confirm whether the 1″ panel fits and quote it in writing.