Is it worth repairing an old shutter?

Usually yes, because a roller shutter is a set of separate parts and each one can be replaced on its own. Strap, winder spring, a worn bearing, one or two slats: repair it, and the shutter carries on for years. Several cracked or warped slats, bent guides, a crushed aluminium curtain: replace the curtain and keep the box.

This page is about the Portuguese roller shutter, the estore de rolo in its caixa de estores above the window. Hinged wooden shutters are a different question, answered at the end.

The rule of thumb

• Strap, spring winder, one or two slats, a worn bearing: repair. These are the parts that wear, they are stock items, and none of them says anything about the rest of the shutter.
• Several cracked or warped slats, bent guides, a crushed aluminium curtain: new curtain, same box. The curtain is the set of slats and the bottom rail. Underneath it, the box, the shaft and usually the guides are fine, and a new curtain goes in from inside through the lid.
• A broken box, a rotten lintel, or a window being replaced anyway: a whole new shutter. That is the only case for it, because taking a box out of a Portuguese wall is building work, not shutter work.

What are the three facts that decide it?

The age and material of the slats. PVC slats on a south or west facing window spend their lives being cooked. They fade, go chalky and crack along their length, and once a curtain cracks in several places from ordinary handling, every repair becomes a return visit. Aluminium with a foam core does not go brittle; it dents, crushes and splits at the edge, and a curtain forced past a jammed slat can be creased for good. One damaged place is a slat. Damage along the length is a curtain.

Whether the guides are straight. Sight along each side channel from below with the shutter up. A guide bent by a ladder, by a shutter forced while jammed, or by corrosion near the coast will jam any curtain, old or new, so it is replaced, usually with a new curtain at the same time, since the window is opened up once. Guides that are straight but full of sand, salt and old paint are cleaned, not replaced.

Whether the box and the shaft are sound. Inside the box sit the shaft the curtain rolls onto, a bearing at each end, and the drum the strap winds on. A shaft bowed on a wide window, seized bearings, brackets pulling out of the box wall: all repairable, and each one adds to the sum. A sound box is what makes a new curtain a modest job; one that needs the shaft, the bearings and the lid is where a full replacement is worth quoting alongside.

When does motorising an old shutter make sense?

When the curtain and the guides are in good condition and the shutter is large, used every day, or awkward to reach. The motor is a tubular unit that takes the place of the shaft, so the curtain and guides stay, the strap and winder go, and the slot in the wall is sealed.

The order matters. A motor applies the same force on every cycle and finds every defect a hand would have felt and stopped at: a cracked slat, a gritty guide, a shaft out of line. So the mechanics come first, and on a failing curtain the sequence is new curtain, then motor. Power is the other question: a cable to the box is what takes the time, and where chasing one in is not welcome there are battery motors charged by a small panel outside. In a house left closed for part of the year, a motor on a timer is often the real reason to do it.

The costs people forget

Each of these is a line on the quote that a bare repair does not carry.

• The second opening of the box. A new strap on a curtain that is already cracking means the lid comes off again within the year, and the work of opening and closing the box is paid twice. Ask what else is at the end of its life while the lid is off.
• Matching the slat. An old profile may no longer be made, and a new slat in a sun-faded curtain shows as a stripe. Sometimes the honest fix is a whole curtain rather than a patchwork, and a good quote says so.
• Access. A first floor box that only opens from outside, or a lid painted shut in an old decoration: the time goes into reaching the box safely, not into the part.
• The weight change. A new aluminium curtain weighs more than the PVC it replaces, so the winder spring is sized for it, and a heavy curtain on a strap is how motorising enters the conversation.
• The box itself. With the lid off, a bare box is the moment to fit insulation and a brush seal at the slot, a small addition now and a separate job later.

What to do next

Send three photos: the shutter fully down from outside, for the curtain and the guides; one slat up close, for the profile and the material; and the open box from inside if the lid comes off easily. Say how many shutters are involved and whether they are manual or electric, and ask for the repair and the new curtain quoted alongside each other, so the decision is made with both in view.

If the fault is a strap or a winder and you would rather do it yourself, the guide to a roller shutter that will not open covers the strap and the tension step by step. For everything past that, roller shutter repair in the Algarve explains what the visit covers and how the quote is put together.

The habits that keep a shutter in the repairable column

Never force a shutter that has stopped: a curtain dragged past a jumped slat is how one broken slat becomes five and a straight guide becomes a bent one. Run the shutters every few weeks in a house that stands closed, because a strap that sits for months dries out and parts on the first pull. Near the coast, rinse the guides with fresh water now and then and keep grease, which holds grit, out of them. And replace a strap that has started to fray at the winder before it snaps.