Patio doors
Sliding Glass Door Repair
Four small wheels carry the whole panel. When they go, the door stops rolling and starts dragging — and in Minnesota it then spends five months as a wall that no longer seals.
- Typical visit
- One to three hours
- Usually
- Rollers and track together
- Replacement
- Rarely warranted
- Estimate
- Free, fixed in writing
Rule these out first
Four things a dragging slider is not
Patio doors attract replacement quotes faster than anything else in the house, usually on the basis of one of these.
Not this
It is not a failed door
Rollers are a wear part, meant to be replaced the way tyres are. The frame, the glass and the hardware around them are almost always fine.
Not this
It is not unfixable because the track is grooved
A stainless cap fits over the damaged rail and gives new rollers a hard, true surface. Taking the frame out of the wall is rarely warranted.
Not this
It is not a broken lock
When a slider will not latch, the panel has usually dropped on worn rollers and the latch sits below the keeper. Resetting the height normally restores the lock.
Not this
It is not something to force when frozen
A panel iced into its track will move eventually, and the rail will be bent when it does. Thawing it costs nothing; forcing it costs a track.
How it actually works
What a patio door is actually doing in January
Four things happening at once on the largest opening in most Minnesota houses.
Carrying weight it was barely rated for
Eighty to two hundred pounds of tempered glass on four small wheels. Worn bearings mean the panel is dragging rather than rolling, and every use cuts the rail a little deeper.
Sealing a very large opening
In the heating season the door stops being a door and becomes a section of wall. A dropped panel and hardened interlock gaskets turn the closing edge into a continuous cold line.
Draining meltwater it was not designed to hold
Snow piled against the sill melts in afternoon sun and refreezes overnight. Weep channels are meant to send that water outside; blocked, they hold it where it freezes.
Freezing from the inside of the track outward
That trapped water expands as it freezes, distorting the rail and jamming the panel. Most of the bent tracks we cap in Minnesota were bent by ice, not by use.
By temperature
The patio door year
A Minnesota slider has four distinct phases and each produces different complaints.
70°F
Heavy and grinding
Peak use onto decks and patios. Worn rollers are most noticeable when the door is being used twenty times a day.
40°F
Draught at the closing edge
First cold mornings reveal hardened interlock gaskets and a panel sitting slightly low.
20°F
Water in the track, then ice
Thaw-freeze cycling fills a blocked sill and freezes it. This is the band where lasting damage happens.
-20°F
Frozen shut
The panel will not move and should not be forced. Thaw it, then deal with the drainage that allowed it.
On the visit
What we check on a slider
Four things, and the first is the only way to diagnose honestly.
Lift the panel out
It is the only way to assess rollers properly. Anybody quoting from pushing the door is guessing.
Sight along the rail
At eye level, for grooves, burrs and pitting. This decides whether the job is rollers or rollers plus track.
Pour water into the track
It should disappear through the weeps within a minute or two. If it sits, you have found what freezes in January.
Check the interlock along its height
Hand down the closing edge with the door shut. Air movement anywhere means the panels are not seating, which is both the cold line and the water path.
Minnesota conditions
What Minnesota does to a patio door
Ice in the track, salt in the bearings and five months as part of the building envelope.
Ice is the main destroyer
More than wear, more than salt. Water standing in a blocked sill freezes, expands and distorts the rail. Nearly every bent patio door track we see in Minnesota was bent by ice and then by somebody forcing the panel.
Snow drifting against the sill
On an exposed deck, snow piles against the threshold and stays for weeks. The melt-refreeze cycle underneath it is relentless and the drainage has to be clear to cope.
Road salt in the bearings
Carried in on boots straight into the track, where it mixes with old lubricant into an abrasive, corrosive paste. Dry silicone is the correct lubricant here; oil makes it worse.
Five months as a sealed wall
Unlike warmer states, a Minnesota patio door spends most of the heating season shut. Hardened gaskets and a dropped panel are a measurable heat loss on the largest opening you own.
Questions
Patio door questions
Is it the rollers or the track?
If the door drags but the rail still looks clean, rollers. If you can see or feel grooves, both. We check both at the estimate.
My door is frozen shut.
Let it thaw. Forcing a frozen panel bends the rail and cracks glass, and the underlying cause is blocked drainage that will do it again next week.
Can a grooved track be repaired?
Yes, with a stainless cap over the damaged rail. It gives new rollers a true surface and costs a fraction of replacing the door.
The door came off its track.
Leave it. The panel is heavy and awkward, forcing it back can chip the rail or crack the glass, and it will not stay on because the rollers have collapsed.
Cold air along the middle of the door.
Hardened interlock gaskets, usually with a dropped panel as well. Renewing them while the panel is out is inexpensive.
How do I stop it happening again?
Vacuum the track a few times a year, clear the weep channels before winter, and use dry silicone. Never oil.
Coverage
Sliding glass door repair across Minnesota
A mobile service covering the whole state, metro to the Iron Range. Pick your town below, or call and we will come to you.
Sliding Glass Door Repair Across Minnesota
Related
Other repairs we handle
Windows and doors are the whole business, so whatever has failed, it is on this list.
Next step
Get the slider sorted before freeze-up
Free estimates across Minnesota, with a fixed written price before we start.