The difference
| Snap-lock | Mechanical-lock | |
|---|---|---|
| How it joins | Panels snap over each other by hand | A seamer folds the seam once (single-lock) or twice (double-lock) |
| Typical pitch | Steeper residential roofs | Can go to lower slopes |
| Wind and water | Good for most homes | Highest uplift and water resistance |
| Install | Faster | Slower; needs the seamer |
| Long panel runs | Good | Best, with floating clips for expansion |
General characteristics; the right system depends on the panel and the roof.
Which one for your roof?
- Typical Texas home, 4:12 and up: snap-lock usually does the job
- Low-slope porches, long ranch roofs, open lake lots: mechanical-lock
- Commercial: usually mechanical-lock
Thermal movement
Texas swings from summer heat to winter freezes, and steel panels grow and shrink. Clips that let panels float, and panels formed to full length on site, help the roof move without stressing fasteners.
See standing seam cost factors. Every metal roof we install is Class 4 impact rated.
Residential warranty: a 10-year transferable workmanship warranty, with manufacturer warranties up to lifetime. Manufacturer coverage depends on the product and brand, and on the project qualifying for that manufacturer's program. We put the exact warranty for your roof in writing.
Certified, with 30 years installing every major roofing brand, a family roofing business going back 75 years, and over $80 million in completed roofing projects. 5.0 stars on Google at all three of our offices.
Request a free inspection or call (817) 733-9228. Small repairs are welcome too.