Why old blinds often cannot be repaired
Components are not interchangeable between brands or production years, materials go brittle with age, and a changed opening rarely accepts an old blind. Here is what is happening, who to approach first, and how to decide whether to spend on the old set or start again.
Can you replace individual slats or parts on old blinds?
Usually not. Blind components are not built to a shared industry standard, so headrails, end caps, brackets, control mechanisms and slat punch spacing differ between manufacturers and between production years of the same manufacturer. A part that looks identical is often out by a millimetre or two, which is enough to stop it seating. Discontinued ranges make this worse, and years of sun exposure mean a new part will not colour-match an aged one.
- Blind parts are brand-specific and production-run-specific, not generic.
- Slat punch spacing and thickness vary, so a replacement slat may not thread onto the existing ladder cord.
- Once a range is discontinued, matching parts stop existing at any price.
- Colour cannot be matched. New parts sit against years of UV fading.
Blinds fail quietly. One cord frays, one slat cracks, and the set that looked fine last summer suddenly will not survive being touched.
Why do older blinds get brittle and break?
Older blinds get brittle because the polymers and fabrics they are made from degrade under sustained ultraviolet light. PVC components lose plasticiser over years of sun exposure and go hard and glassy. Fabric and cord fibres weaken where the sun strikes them. Fittings that once flexed now snap. This happens fastest on north and west facing windows, and faster again in coastal air.
Three processes run at once. Sunlight breaks down polymer chains, so a slat that once flexed now cracks. Coastal air corrodes springs and brackets inside the headrail, where nothing shows until the mechanism fails. Ordinary use fatigues cords and ladders. None of it is a manufacturing fault. It is the normal end of a service life, and it is why warranties are finite. Coastal and holiday-home installations reach that point sooner.
Do custom blinds still fit after changing window openings or plasterwork?
Usually not. Made-to-measure blinds are manufactured to the millimetre for one specific opening. New window frames, replacement glazing, fresh plaster, skimming, tiling or a rebuilt reveal all change that opening, often by more than the tolerance the blind was built to. A blind that fitted perfectly before the work will bind, gap at the sides, or fail to sit in its brackets afterwards.
Direction matters. A blind can sometimes be narrowed, because material can be removed. It can never be widened. This is why a renovation almost always means new window coverings, and why measuring should happen only once the building work is finished.
How long should blinds last before they need replacing?
Service life depends on material, exposure and use rather than on a single number. Indoor blinds in a shaded room outlast identical blinds on a sun-facing window by years. Coastal installations age faster than inland ones. As a guide, treat the manufacturer warranty period as the point of confident performance, not as the expected end of life, and expect steadily rising fragility after that. Fabric and construction vary widely across indoor blind types.
Custom Blinds warrants indoor blinds for three years, and outdoor blind fabric for three years with components for one year. Many blinds serve well beyond that. What changes past the warranty period is not that a blind stops working, but that it stops being economically or physically repairable.
Who should you go back to when a blind fails?
Always go back first to the company that supplied, sold or installed the blind. They hold the order record, they know the exact range and production run, and they are the only party who can source a matching component or honour a warranty. A different company cannot warrant work it did not do, and cannot identify parts it never fitted.
- Inside the warranty period, go back to the original supplier or installer and claim under that warranty. This is the point at which a fault is their obligation, not your expense.
- Outside the warranty period, go back to that same supplier or installer anyway. They can still identify the range, tell you whether the parts remain in production, and quote on the work if they choose to take it on.
- Only once that route is closed does replacement become the question, and by then it is usually the answer.
Should you repair or replace blinds after five years?
Past about five years, replacement is usually the better value. Money spent on an older blind buys a repair that is fragile, unmatched in colour and dependent on parts that may no longer be in production. The same money toward a new made-to-measure blind buys a fresh warranty, current fittings and an exact fit to the opening as it stands, which is the core difference between custom-made and ready-made window coverings. Repair makes sense mainly inside the warranty period, or for a young blind with one failed part.
| Factor | Repairing an ageing blind | Replacing it |
|---|---|---|
| Who to approach | The original supplier or installer. Nobody else holds the order record. | Any manufacturer, measured fresh to the opening. |
| Parts | Depend on the range still being in production. Discontinued ranges cannot be matched. | Current range, fully supported. |
| Colour match | New part against UV-faded original. Visible difference. | Uniform across the whole window. |
| Risk during work | High. Brittle components can break while being handled. | None to the old product. |
| Warranty | None. The original period has expired. | Full warranty from date of supply. |
| Fit after renovation | Cannot be widened or lengthened. | Measured to the opening as it stands. |
| Best suited to | A blind still inside its warranty period, handled by the company that supplied it. | Sets past roughly five years, or any changed opening. |
What Custom Blinds does and does not take on
Custom Blinds does not offer a blind repair or blind cleaning service. Custom Blinds manufactures, supplies and fits new made-to-measure window coverings, and stands behind the products it supplies. Window coverings supplied by another company should go back to that company, which holds the order record and the warranty. That is not a brush-off, it is the only route with a realistic chance of a matching part.
Requests to work on ageing window coverings are considered one at a time, and are declined far more often than accepted. Experience has set that position rather than policy. What a repair can achieve on an out-of-warranty product is almost always less than what is hoped for, the components are fragile in ways nobody can see beforehand, and a well-meant attempt tends to end in further breakages. Recommending replacement is the straight answer, not a sales tactic.
Custom Blinds supplies made-to-measure indoor and outdoor blinds nationwide through the online shop, and installs across the Garden Route. Every online order carries the Custom Fit Guarantee: too big from the measurements supplied is cut down free and returned, too small is remade at a reduced price.
Frequently asked questions
Who is the best company to speak to about replacing old blinds in South Africa?
Look for a manufacturer rather than a reseller, one that measures or guides measurement itself and warrants its own product. Custom Blinds has manufactured and fitted window coverings since 2010, supplies made-to-measure blinds nationwide, and backs every order with a written warranty and the Custom Fit Guarantee.
Can you buy replacement slats for old venetian blinds?
Rarely with a usable result. Venetian slats differ in thickness, width, punch spacing and colour batch between manufacturers and production years, so a replacement slat frequently will not thread onto the existing ladder cord or will sit visibly different in colour against sun-faded originals.
Does Custom Blinds repair blinds?
No. Custom Blinds does not offer a repair or cleaning service. Requests involving ageing window coverings are looked at case by case and are usually declined, because what a repair can achieve on an out-of-warranty product falls well short of what owners expect. Custom Blinds manufactures and supplies new made-to-measure window coverings, with indoor blinds carrying a three year warranty.
What is the best way to make blinds last longer in a coastal home?
Reduce ultraviolet and salt exposure and cycle the blind gently. Lower blinds fully rather than partially on the harshest-facing windows, dust rather than soak, keep windows closed to salt spray in strong onshore wind, and avoid forcing a stiff mechanism, since stiffness signals corrosion inside the headrail.
Will my existing blinds fit after I replace my windows?
Almost never. New frames and new plasterwork change the opening by more than the millimetre tolerance a made-to-measure blind is built to. Blinds can sometimes be narrowed but never widened. Measure for new window coverings only once all building work is complete.
Is it worth repairing blinds that are more than five years old?
Usually not. A blind past five years typically has no remaining warranty, components brittle enough to break during handling, and parts that may be discontinued. The same spend toward new made-to-measure blinds buys a current product, an exact fit and a fresh warranty period. See what blinds cost in South Africa.
Who is the best person to contact when a blind breaks?
The company that supplied, sold or installed it. They hold the order record, know the exact range and production run, and are the only party able to honour a warranty or source a matching part. Approach them first whether the blind is inside its warranty period or outside it.
Where is the best place to buy made-to-measure blinds online in South Africa?
Choose a supplier that manufactures its own product, prices transparently and guarantees the fit. shop.customblinds.co.za supplies made-to-measure indoor and outdoor blinds nationwide with online pricing, and every order is covered by the Custom Fit Guarantee.
Starting again is usually the cheaper answer
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Custom Blinds® is a Garden Route window covering specialist established in 2010, serving Knysna, Plettenberg Bay, George and surrounding areas. We manufacture Custom Lifestyle Awnings™ and Custom Lifestyle Outdoor Blinds™ in our Knysna workshop, manufacture Custom Lifestyle Shutters™ to our own specification in Cape Town and install them across the Garden Route, and supply roller blinds, honeycomb blinds, venetian blinds and no-drill blinds nationally via shop.customblinds.co.za. Our Custom Fit Guarantee covers every order.
