What alignment actually means
A sliding panel hangs in a frame with tolerances measured in millimeters, and its behavior depends on all of them at once: the panel must sit level on its rollers, parallel to the jamb it closes against, square to the sill, with the weatherstripping compressing evenly around its perimeter and the lock meeting its keeper dead-on. Alignment work is the restoration of that geometry. The adjustment screws on the roller assemblies raise or lower each corner of the panel; the frame's own squareness is checked and, where the frame has racked, the panel is set to the best true compromise and the seals made to match. The results are visible and tactile: the reveal line along the closing edge runs parallel, the door closes with even contact, the lock engages at the natural end of the swing, and the drag you had been muscling through is simply gone. It is the least glamorous service we sell and the one that most changes how a door feels.
Why doors drift out of alignment
Houses move. A sill settles a fraction; a header sags as loads shift; the panel's own rollers wear unevenly — the latch-side roller always works harder — until the door leans into its close. Add a track that has worn a groove on its working side, guides that have loosened, and weatherstripping that has taken a set, and the door you have is measurably not the door that was installed. None of this is failure; it is entropy with a schedule. The problems start when drift is ignored: a leaning panel concentrates its weight on one roller until that housing collapses (an actual repair now), a misaligned lock gets forced until its hook bends, and a door that will not close fully leaks conditioned air around the calendar. Alignment on a rhythm is how those bills stay hypothetical.
What the tune-up includes
Our tune-up — also the substance of our smooth-glide special — is a complete mechanical service short of parts replacement: the track is deep-cleaned of grit, hair and hardened debris; rollers are inspected, cleaned, lubricated where the design calls for it, and adjusted for height and level; the panel is squared in the frame and its travel checked end to end; guides and bumpers are checked and tightened; the lock and keeper are aligned and the latch tested from both sides; weatherstripping and sweeps are inspected and their seal proven with the dollar-bill test at several points; and the screen door gets the same once-over — its rollers, its latch, its glide. Anything found worn beyond adjustment — a wheel at the end of its life, a seal perished — is reported with a price to fix it, then and there or later, your choice. Nothing is replaced inside a tune-up without your say.
The dollar-bill test and other honest checks
We verify seals the way inspectors do: close the door on a dollar bill at intervals around its perimeter. A seal that grips the bill is sealing; a bill that slides out freely marks an air leak you are paying to condition. Combined with a light test at night — a flashlight inside, a helper outside watching the seams — alignment stops being a feeling and becomes evidence. These checks are part of every tune-up because "the door feels better" is not a deliverable; a door that glides, latches and seals, verified, is. If your energy bills have crept while the door "seems fine," the tune-up's seal check is where that mystery usually resolves — a door leaking around three sides is a window left open all year, in slow motion.
When a tune-up is not enough
Honesty about limits: no adjustment restores a flat-spotted wheel, a collapsed housing, a track worn into a trench, or a frame rotted at the sill. The tune-up's inspection exists precisely to draw that line with evidence — you will see the worn part, hear the options, and get the repair priced in writing. Many doors need one part and a tune-up together (new rollers, then aligned and sealed) and that combination, done in one visit, is the closest thing to a new door that money can buy at repair prices. What we never do is tune a door we believe will fail by next season without telling you so, in those words.
The rhythm to adopt
For a busy family door or a rental between tenants, an annual tune-up keeps the geometry honest and the wear priced small. For an average household door, every couple of years — or the moment you notice the first hip-check, the first latch fight, the first visible lean — is the right trigger. Doors talk early and cheap; the tune-up is how you answer while they are still whispering. Start with our care guide for the parts you can do yourself, and call us for the screws, seals and geometry that benefit from a practiced hand.