If your Velux blind will not stay up, the problem is almost always the side guides or the spring tension. Slide the blind back into both side channels first, then test it. If it still will not hold, the spring needs adjusting. Check that the top brackets are secure too. See our Velux and loft blinds for made-to-measure replacements if your blind is beyond a quick fix.
This guide walks you through the most common Velux blind problems, in the order you should check them. We will help you spot what is wrong, show you how to clean and look after your blind properly, explain how to adjust the tension, and cover what to do if a part is broken. By the end, you should be able to get your blind working again, or know for certain that it needs replacing.
Velux blind stuck in the closed position
If your Velux blind will not lift, the side guides have usually slipped out of their channels, or the spring has lost tension. Ease the blind back into both side channels and test it. If it still will not stay up, the spring needs re-tensioning.
Velux blind keeps opening or slipping
A blind that creeps down on its own, or springs open when you let go of it, has the wrong spring tension. Take the blind down, turn the tensioning wheel at the top a few turns, then refit it and test again. Keep adjusting until it holds firm at any height.
Re-tensioning or replacing the spring
On most Velux roller and blackout blinds, the spring sits inside the top bar. Turn the tension wheel to adjust it. If the spring is worn out rather than just loose, order a Velux repair kit that matches the blind code printed on the top rail. Getting this code right matters, as kits are made to fit specific blind models.
Identifying the issue with your Velux blind
Before you try to fix anything, it helps to work out exactly what is wrong. This stops you from fixing the wrong thing and causing more damage.
A misaligned or jammed blind usually happens when it is sitting slightly off the window frame, or when something is blocking its path. Gently pull the blind back into line and check for anything stuck in the runners.
A snapped cord or chain means the blind will not raise or lower properly, even though the mechanism itself is fine. You will need a replacement cord or chain kit made for Velux blinds. If you have young children in the house, it is worth choosing a kit designed with loose cords tucked away, or reading our guide on child-safe options for window coverings before you buy.
If the blind feels stiff or does not glide smoothly, it may just need a proper clean. Dust and grit build up in the side channels over time and can make even a healthy blind feel stuck.
Cleaning and maintaining your Velux blind
A quick, regular clean solves more problems than people expect. For the full method on other blind types too, see our guide on how to clean and care for your blinds.
Dust the blind with a soft cloth or a feather duster every couple of weeks. This stops dirt building up in the folds and channels.
For a deeper clean, mix a small amount of mild detergent with warm water and wipe the blind gently with a soft sponge. Rinse off any soap and let the blind dry fully before you raise or lower it again.
While you are cleaning, check for loose screws or worn parts. Tighten anything loose, and note down anything that looks like it needs replacing.
Adjusting the tension of your Velux blind
Getting the tension right is the fix for most blinds that will not stay in place. Too loose, and the blind will not hold its position. Too tight, and it becomes hard to move.
Most Velux blinds have tension adjustment screws on either side of the headrail. Using a screwdriver, turn these clockwise to tighten the tension, and anticlockwise to loosen it. Make small adjustments and test the blind after each one, rather than turning it a lot in one go.
Once the blind moves smoothly and stays where you put it, you are done. If it is still causing problems after adjusting the tension, the issue is likely a broken or worn part rather than tension alone.
Fixing broken or stuck blinds
If your blind is stuck or damaged, do not panic. Most faults can be traced to one of three things: a broken slat, a tangled cord, or a bent part of the mechanism.
To check for damage, take the blind down and lay it flat somewhere clean. Look along the whole length for broken slats, tangled cords or anything bent out of shape.
To replace a broken slat, unhook the damaged one from the ladder string or chain connector, and clip in a new slat of the same size and style.
If a cord or chain has tangled, gently work it loose with your fingers or a blunt tool such as the end of a pencil. Do not pull hard, as this can snap the cord or damage the mechanism.
If part of the mechanism is bent, use pliers to straighten it carefully. Apply gentle pressure only. Too much force can snap the part completely.
Replacing parts and components
Sometimes a clean, a tension adjustment or a small repair will not be enough, and a part simply needs replacing.
Start by working out exactly which part has failed, whether that is a cord, a bracket, or the control mechanism. You may need to remove the blind from its brackets to see the part clearly.
Once you know what you need, order the replacement using the blind code printed on the top rail. Velux sells parts matched to specific models, so this code is the fastest way to get the right one.
Follow the fitting instructions carefully, and take your time. Having a second pair of hands to hold the blind steady while you work makes the job easier.
Frequently asked questions
How do I measure my window for a replacement Velux blind?
Measure the width and height of the window recess, not the frame around it. Take each measurement twice to be sure, and use the blind code on your current blind if you have one, as this tells you the exact size Velux made it to.
Can I paint my Velux blind to match my room?
It is possible, but not something Velux recommends, and it can affect how the fabric folds or blocks light. If you want a different colour or finish, it is usually better to choose a new blind in that colour.
Can I fit blackout blinds to Velux windows?
Yes. Blackout blinds are made to fit Velux roof windows exactly, and block out light fully for bedrooms or media rooms. Our guide to blackout blinds for bedrooms has more on choosing the right fabric and fit.
What is the most common mistake people make when fixing Velux blinds?
Skipping the measuring step. Fitting parts or a replacement blind without checking the exact blind code or window size is the main reason repairs go wrong.
Get help with your Velux blind in Kent
If you have worked through this guide and your Velux blind still will not behave, it may be worth having it looked at properly rather than fitting more parts.
Our Velux and loft blinds are made to measure across Kent, come with a five-year manufacturer’s warranty and a two-year fitting warranty, and are child safe as standard. If your existing blind is beyond repair, this is usually the more reliable option than a generic online replacement, as it is built to your exact window code.
Book a free home visit, and we will take a look at your blind, tell you honestly whether it is worth repairing, and measure up for a replacement if it is not.
