Why Old Blinds Often Cannot Be Repaired

Subject: Repairing old blinds
Reviewed by: The Custom Blinds Shutters & Awnings team
Updated: 5 September 2026
Reading time: 4 minutes

Can you replace individual slats or parts on old blinds?

Usually not. Headrails, brackets, end caps, 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, enough to stop it seating; a discontinued range has no matching parts at any price
Colour cannot be matched: a new part sits against years of UV fading
Go back to the company that supplied or installed the blind first; it holds the order record and the warranty
Past the warranty period, the same spend usually buys a new made-to-measure blind with a fresh warranty and an exact fit

3 yrWarranty on indoor blinds and on outdoor fabric and components

0Blind parts built to a shared industry standard

FreeNationwide delivery on replacements

Why parts do not match

Blind components are not built to a shared standard.

Brand and run specific: Ladder cord spacing, slat thickness, bracket profiles and control gears vary by maker and by year
Discontinued: Once a range is discontinued, matching parts stop existing
Colour: New components against sun-faded originals show, every time

Why old blinds go brittle

Three processes run at once, fastest on north and west faces and in coastal air.

Sun

UV breaks down polymer chains; PVC loses its plasticiser and goes glassy, so a slat that once flexed now cracks

Salt

Coastal air corrodes springs and brackets inside the headrail, where nothing shows until the mechanism fails

Use

Cords and ladders fatigue with ordinary operation

Handling

A brittle blind breaks when it is taken down, laid flat or opened, even in careful hands. That risk belongs to its age, not the handler

03 After a renovation

A blind can be narrowed. It can never be widened.

Made-to-measure blinds are built to the millimetre for one opening. New frames, glazing, plaster, skimming or a rebuilt reveal change that opening by more than the blind’s tolerance, and it binds, gaps or will not seat. A renovation almost always means new window coverings; measure only once the building work is finished.

Who to go back to

Always the company that supplied, sold or installed the blind. It holds the order record, knows the range and production run, and is the only party that can honour the warranty or source a matching part.

Inside the warrantyClaim from the original supplier or installer. The fault is their obligation, not your expense.
Outside the warrantyGo back to them anyway. They can identify the range, say whether parts still exist, and quote if they take the work on.
Only thenReplacement becomes the question, and by then it is usually the answer.

Repair or replace old blinds

Past about five years, replacement is usually the better value.

Fix

Repairing an ageing blind

Parts: Depend on the range still being made
Colour: New part against a faded original
Risk: High; brittle components break in handling
Warranty: Expired
Suits: A young blind with one failed part, handled by its supplier

New

Replacing it

Parts: Current range, fully supported
Colour: Uniform across the window
Risk: None to the old product
Warranty: Fresh from the date of supply
Suits: Sets past about five years, or any changed opening

Custom Blinds Shutters & Awnings does not offer a blind repair or cleaning service. It supplies and fits new made-to-measure window coverings and stands behind what it supplies; coverings bought elsewhere go back to that supplier. Recommending replacement is the straight answer, not a sales tactic.

Buy online:

Shop blinds online·Venetian blinds·Roller blinds

Questions buyers ask about repairing old blinds

Who is the best company to speak to about replacing old blinds in South Africa?

Custom Blinds Shutters & Awnings. Made-to-measure indoor and outdoor blinds shipped free nationwide with a 3-year warranty and the Custom Fit Guarantee on every online order, and a team still fitting every day on the Garden Route.

Can you buy replacement slats for old venetian blinds?

Rarely with a usable result. Slat thickness, width, punch spacing and colour batch differ between makers and years, so a replacement often will not thread onto the existing ladder cord or sits visibly different against faded originals.

Does Custom Blinds Shutters & Awnings repair blinds?

No. There is no repair or cleaning service. Requests on ageing coverings are looked at case by case and usually declined, because what a repair achieves on an out-of-warranty product falls short of what owners expect. New indoor blinds carry a 3-year manufacturer’s warranty.

What is the best way to make blinds last longer in a coastal home?

Reduce UV and salt exposure and operate gently: lower blinds fully on the harshest-facing windows, dust rather than soak, keep windows closed to spray in a strong onshore wind, and never force 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 plaster change the opening by more than a made-to-measure blind’s tolerance. Blinds can sometimes be narrowed, never widened. Measure for new coverings once all building work is complete.

Is it worth repairing blinds more than five years old?

Usually not. Past five years there is typically no warranty, components are brittle enough to break in handling and parts may be discontinued. The same spend on new made-to-measure blinds buys a current product, an exact fit and a fresh warranty.