The part that does the heavy lifting
Two small roller assemblies carry the entire weight of a sliding glass panel. On a big lanai door that load is considerable, and it rolls back and forth many times a day. Eventually wheels crack or flatten, bearings seize, and the housings rust. Instead of rolling, the panel starts to slide, and you feel it as resistance, noise or a door that stops short.
Is it the rollers? Quick checks
- Look at the bottom edge of the moving panel. Is it touching the sill, or lower at one end?
- Listen as it moves. A gritty crunch or a squeal usually means failing bearings.
- Try the adjustment screws at the bottom of the panel ends. If turning them no longer raises the panel, the rollers are likely done.
Our roller replacement process
We remove the panel and pull the old assemblies, then match new rollers by profile, size and load rating. Heavier and impact-rated panels need heavier-duty rollers. While the panel is out, we clean and inspect the rail. Once it’s back in, we set the height and level, so the door clears the sill, closes against the jamb and meets its latch.
Rollers and rails go together
A roller that failed months ago may have ground a groove into the rail. Putting new wheels on a damaged rail shortens their life, so if we find damage, we’ll show you and quote track repair alongside.