Why is my storage unit roll-up door hard to open?

A roll-up door that used to lift with one hand and now takes all your weight is telling you something. Here is how to read it, what you can safely check yourself, and when to call.

First, test the balance

Lift the door all the way up, then pull it all the way down, and compare the effort each way. Inside Self Storage gives the rule the trade uses: if the door is hard to open and easy to close, the spring may need more tension. If it is hard to close and easy to open, the spring may have too much.

• Hard to lift, easy to close. The spring has lost tension, or it is broken. This is the most common reason a storage door gets heavy.
• Easy to lift, hard to close, or it flies up. The spring has too much tension.
• Hard both ways, or it stops at the same spot. Something is dragging: the guides, the curtain or the latch.

Why a storage unit door gets hard to open

• The spring lost tension. Inside Self Storage calls spring tension the most common adjustment as these doors age. The spring stays wound while the door is closed, and a unit that is opened once a month still keeps it loaded every day. Metal under constant tension tires faster, so a little used door can wear out sooner than you would expect.
• The spring broke. If the door suddenly feels like dead weight, the spring has likely snapped. Leave the door where it is.
• Dirty or worn guides. The curtain rides in a guide on each side. Grit, leaves and worn wear strips make the door grind, stick or bind.
• Bent guides or a dented curtain. A bumped guide or a creased curtain catches as it rolls. Dents from a vehicle or a forced entry are common at storage facilities.
• The latch is still engaged. A slide bolt or latch that is not fully open, or one that has been bent or pried, holds the bottom bar down.
• Ice and cold. In a Denver winter the bottom seal can freeze to the slab, and cold makes a dry door stiffer still.
• A dry spring and dry brackets. A dry spring works harder and fails sooner than a lubricated one.

What you can safely check

1. Make sure the latch or slide bolt is fully open and nothing is jammed in it.
2. Look along both guides for debris, and wipe them clean.
3. In cold weather, look for ice along the bottom seal. Chip it away gently. Do not pour salt at the door, since salt speeds up rust on every metal part.
4. Look at the curtain for dents or creases where it sticks.
5. Lift slowly and evenly from the center of the bottom bar or the pull strap, never from one corner.

What not to do

Do not try to adjust the spring yourself. It is wound under high tension even with the door down, and a slip can cause a serious injury. Trac-Rite, a rolling door maker, says in its manual that the door must be fully open, with the curtain wrapped on the barrel, before a torsion spring is wound. Do not force a door that is jammed partway, and do not pry at the latch, since both bend the curtain and the guides. If you rent the unit, tell the facility office. The door belongs to the facility, and the manager can have it repaired.

How to lubricate a roll-up door

Inside Self Storage recommends a silicone product or a wax on the guide wear strips rather than grease. The spring, bearings and brackets do want grease, and a well greased spring lasts longer than a dry one. Wipe the bottom seal clean while you are there. Facility staff can do this at each move out, when the unit is empty and the door is easy to reach.

Repair or replace?

Most heavy doors need a spring retensioned or replaced, a guide straightened, or a latch renewed. Each of those is a repair. A curtain that is badly torn, rusted through or crushed by a vehicle can make a new door the better value. A technician can tell you which on the first visit.

Common questions

How do I open a jammed storage unit door?

Check that the lock and latch are fully open, then lift slowly from the center of the bottom bar. If it moves a few inches and stops, look for debris or a bent spot in the guides. If it will not move at all, or it feels far heavier than it should, stop and call the facility office, since a broken spring is likely. Forcing it can bend the curtain.

Why won't my roll-up door roll up tight?

A door that will not roll all the way up, or slides back down a few inches, usually has too little spring tension. A dirty or bent guide near the top can also stop it short. Retensioning the spring is a technician's job.

Why is my door stiff and difficult to open?

Stiffness that is the same all the way up points to the spring. Stiffness at one spot points to the guides or a dent in the curtain. Stiffness only in winter often comes from ice at the bottom seal or a dry door.

How often should storage unit doors be checked?

Inside Self Storage suggests a three to five minute inspection at every move in and move out: the spring, curtain, guides, latch and bottom seal. Springs are easiest to see with a flashlight while the door is rolled down.

How G Brothers helps

G Brothers works on self-storage roll-up doors regularly, for facilities across the Denver metro, including Lakewood, Denver, Arvada and Wheat Ridge. We retension and replace springs, straighten guides, renew latches and repair dented curtains, one unit or several on the same visit. We dispatch 24/7 and can provide a certificate of insurance, usually within 24 hours. See storage unit door repair and roll up and rolling steel door repair, read how to open a roll up door by hand, call (720) 421-6489, or ask for a free estimate.

Sources

• Inside Self Storage, Maintaining Your Self-Storage Roll-Up Doors for Better Operation, Lower Expenses and Longer Life
• Inside Self Storage, Ensuring Form, Function and Long Life: How to Properly Care for Your Self-Storage Unit Doors
• Trac-Rite Door, Rack-Lock installation manual (spring winding)