DIY mistakes
Common DIY Roller Shutter Mistakes (and How to Avoid Them)
Updated 24 May 2026
Quick answer
The five most expensive DIY roller shutter mistakes in Australia are: wrong measurements (cut-to-size kits are non-returnable), unsafe or uncertified mains wiring (illegal and voids insurance), wrong bracket type for the wall, out-of-level head box (causes binding within weeks), and voiding the warranty by failing to follow brand installation requirements.
Each is avoidable with a careful read of the manual, a second person verifying the work, and booking a licensed electrician for any mains-power task.
- Who this is for
- DIYers about to start a roller shutter project and wanting to avoid known pitfalls.
- Key takeaway
- The most expensive DIY mistakes are the ones that arrive in writing. Wrong-size kits and voided warranties. Both are avoidable.
Every mistake on this page has cost an Australian homeowner real money in the last 12 months. Each one is easy to avoid with a small amount of preparation. If you're reading this before ordering the kit, the next 5 minutes will save you a few hundred dollars.
Typical price ranges
Indicative supplied-and-installed pricing across Australia in 2026. Final pricing depends on installer assessment.
Wrong-size kit (non-returnable)
$220-$850 lost
kits are cut-to-order, no refund
Uncertified wiring rework
$300-$600
electrician must redo + re-certify
Wrong bracket type. Wall damage
$150-$500
patching + re-drilling
Voided motor warranty (early failure)
$300-$700
full replacement at your cost
What changes the price
Mistake 1: measuring in mm and cm on the same form
Suppliers receive measurements in millimetres. A homeowner writing "150 cm" instead of "1500 mm" can result in a kit cut to 150 mm wide. Useless and non-refundable. Always write mm, always confirm with the supplier.
Mistake 2: measuring at only one point
Window openings are rarely perfectly square. Width measured at the top can differ from the bottom by 5-15 mm. Always measure at three heights and three widths, and order from the smallest of each.
Mistake 3: DIY mains wiring on electric shutters
Uncertified electrical work is illegal in every Australian state, voids home insurance, voids the motor warranty and creates a fire/shock risk. Book a licensed electrician, no exceptions.
Mistake 4: wrong bracket fixings for the wall
Timber-frame walls need screws into studs (not the plasterboard). Brick veneer needs masonry plugs in the brick course (not the air cavity). Solid masonry needs deeper plugs through both leaves. Mismatched fixings can pull out and damage the wall.
Mistake 5: skipping the level check
A head box that's 5 mm out of level over a 1500 mm window means the shutter binds within 5-10 cycles. Check level at every stage. Initial line, after bracket mounting, after head box install, after side channels.
Mistake 6: voiding warranty by ignoring installation manual
Brands like Somfy, Becker, Alpha and Nice require specific bracket spacing and side-channel screw counts for warranty cover. Failing to follow them voids the motor warranty. Read the manual, follow it exactly, retain photos of compliance.
Mistake 7: ordering without checking lead time
Cut-to-size kits often have 2-5 week lead times. Longer for custom colours. Ordering without confirming lead time can delay an entire renovation.
The single most expensive mistake
Without question: ordering a wrong-size kit. Cut-to-size shutters cannot be returned or recut. A single $500 kit ordered to the wrong dimensions is $500 straight in the bin, plus the time to re-order and re-measure correctly. Spend 15 extra minutes measuring with a second person before you click "buy".
The most dangerous mistake
Wiring an electric motor to mains power without a licensed electrician. In Australia this is illegal under AS/NZS 3000, voids home insurance and the motor warranty, and creates a serious fire/shock risk. Even if you've done electrical work before, the law is unambiguous. Book a sparkie.
Recovering from a DIY mistake
If you've already installed a shutter that's binding, leaking weather, or otherwise misbehaving. Most local installers will come out and rectify a DIY install for a labour-only fee (typically $150-$350 per window). Some won't touch DIY work at all. Get a quote from a local installer who explicitly accepts DIY rectification work if you need help fixing a mistake.
Checklist before you accept a quote
- 1
Measurements in mm only, three points each
Never mix mm and cm; order from smallest reading.
- 2
Independent second-person verification
Catches almost every measurement error.
- 3
Licensed electrician booked for any mains work
No exceptions.
- 4
Correct bracket type for your wall
Confirm with supplier before ordering.
- 5
Level check at every stage
Initial line, brackets, head box, side channels.
- 6
Manual followed exactly for warranty cover
Retain photos of compliant install.
Frequently asked questions
What is the most common DIY roller shutter mistake?
Can I wire an electric roller shutter myself in Australia?
Will DIY installation void my roller shutter warranty?
What do I do if I've already made a DIY install mistake?
Made a DIY mistake or want to avoid making one?
Get quotes from local installers. Including those who accept DIY rectification work.