It's the screws on the cap pings that let the water in, no need to remove the glued down trim. We tend to fit slightly oversized screws back in with a liquid silicone gasket.

Many thanks for this - did mine last week from the inside by opening the window and standing on my step ladder (I never knew my real ladder). I used some Screwfix No Nonsense Roof & Gutter Sealant as I thought would be easier to remove if I even needed to replace the glass.

I had the same problem last year - I have six velux all the same - two were showing water damage at the bottom corner. I was fortunate to be able to look at all six and they all showed the same problem at differing worsening stages which gave absolute proof it was water coming through the screws in the aluminum cappings. On velux's newer models they have stopped using screws although I think two still remain. I took the argument up with Velux and they gave me 6 brand new windows for free. mine were about 12 year old but I argued under the the New Zealand consumer guarantees act that they should last for at least 15 years and be fit for purpose. Velux timber is not treated so any moisture rots the wood immediately and repairs just delay the inevitable once they start to leak. I also found that the glue that they laminate the various sections together was failing - I suspect this was either due to the moisture or vapour in the roofspace - Again Velux insulate the newer models. just putting silicon on the screws and keeping an eye on them would make then last for many more years. Velux should fess up and tell everyone what to do to get more life out of their windows but I guess they are in the game of selling more windows

As per comments below, this enabled me to quickly get to the problem, replace the seals and solve the problem. Just to let you know how I appreciate your clear description and well thought through video. You made it so easy. No more leaks!!!

Thanks so much for this video! You are a life saver, sir. I had exactly the same problem with the rubbery stuff being dried out and crumbly near the bottom. Only difference is that water was coming in through the right bottom corner of the window. The wood started rotting there and there is a small hole now, but I think I'll be able to fix that with special filler. First I wanted to make sure that there was no longer any leaks. We have had a couple of severe showers now and I've seen no water come in whatsoever. Thanks again!

Not what I intended to be doing on Christmas Eve, but after big leak I had no option. Many thanks for the top tip identifying our issue😊

thank you, exactly same problem. Velux just 10 years old on 200 year old cottage in Scotland........We have caught it early as the window is right above our bed........so we will get the window out this weekend and replace with clear silicone. superb vid and explanation.

After a couple of dry days run a bead of plumbers gold clear sealant along the edges. Frog tape glass to stop overspill. Works perfectly and my velux windows are over 20 years old.

I had the same problem and, after years of desperation, I finally called the Velux technical service. What they did was pretty much the same as you did. However, they charged me 200 € for repairing two windows. Thanks for sharing, great video !!

Great video. You gave me confidence in having ago at resealing mine. I would just like to add that be careful when removing the metal retainer on the window pane as it is a single piece and not three!

Ours are about 12 years old and one (of 4) has started leaking in the corner. It's the same seal issue you describe, with it going all crumbly over time. I've tested out sealing it without taking off the metal frame.. just shoving a thin sausage of Blu-tac where the glass meets the metal frame & that's fixed the leak. I'm therefore thinking I'll just use some low modulus silicone where the glass meets the metal frame without taking it off.. that'll stop the water seeping into that area & running down to the wood.

It's recommended to use low modulus silicone as it has less restriction to stretching with the two different materials applied to being that is being applied to glass and metal

Thank you for doing this video. I've got *exactly* the same problem. Just waiting for my wife to help me remove the window so I can remove the trim and re-seal it. It only seemed to start leaking after we bothered to clean the outside of the windows. I think we disturbed the moss/dirt that was actually sealing the gap! I will comment back in a few days when hopefully I would have sorted the issue.

All my 4 Velux skylights are leaking also. Thought it might've been the glass seal, so siliconed that but they still leak. Thanks all for the tips in the comments, and for this video.

Two of mine did this.... All I did was clean the outside edge of the glass where the trim is and added a small bead of weather proof silicone around the edges and it's not leaked since I didn't remove anything 👍

Based on the frequency of issues with Velux skylights it seems like they should offer a hefty upgrade discount for people with wooden frame models.

Well done to you, if that's not your trade. Fair play 👍🏻

Thanks, this may help me solve my problem which is pretty much the same, same window too, we've had some serious rain and I have been drying the window every day with a hairdryer lol, I just hope I can get a dry day to attempt a fix.

An extremely clear and useful explanation. Thank you.

I have this same problem on my fixed (non-opening) Velux skylight. Appreciate the very thorough explanation and good video. However, it would have been more effective if you actually showed the repair process you performed versus just talking about it. Thank you though.

Thank you

Thank you so much for the video. One of our Keylite roof windows that looks very similar to your Velux windows leaks the same way as in your video. The leak is not around the edge of the glass, it comes out through the wood but we cannot see where the water gets in. We have removed the profiles on both sides as you described in your video, but we could not see any rubber seals. Please could you explain what we should be looking for? Thank you.

I've bee having this problem for ages! However, my leak isn't coming from where you showed, mine is coming from the corner where the water builds up, literally, through the corner..... I have no idea how it's getting there!

Nice one .Well done😊a

Did you unscrew each of the grey flat profiles with the 2 screws to get to the bad silicone? Fab video. When I saw your video, it looked like it could have been my house

Thanks for this, excellent! Can this repair be done from the inside? Can I remove the bead without the glass falling in?

My velux window is made of wood and it cracks during sunny days. Any idea how to fix it?

Great - I’m having issues with my windows and I am told that it’s the flashings

Perfect! Thank you.

Thanks .I will try again with silicone.looks a common problem.(velux ?)

Where exactly did you put the sealant in? Thanks

How do you remove the window from the sill? I can’t figure it out,it rains a lot here in Auckland/New Zealand and I have the same problem!

Mine are 18 months old and one has just started leaking. Great😂

wow, thats a good hint to fix the problem. I have the same and will do it in spring. Can you kindly tell me, which silicone you used? Do you also have the problem with condensed water along inside the wooden frame (not the window itself)? This also condenses and is running down to the corners....

Velux Design Flaw .. and the screws are directly below the drip on the lower trim so water pours onto the screws and if they are not tight then water leaks past the screws ... Unbelievably bad design !!

I have the same problem, thanks for the inspiration! For now, I solved this with some duct-tape :).

Thanks for sharing!

Do you need to buy spare parts or just use the silicon?

Good Job mate! I'm having the very same issue on a Fakro roof window. As far as you know, is a general purpose clear silicon sealant enough for the job? Or you used something more specific?

Did you remove the window from the frame first, before doing any repairs? Thanks

My window doesn’t leak unless it is shut - weirdly - then it has the same pattern of leaking as described - why would that happen?

This is a common problem on these windows, about 5 year mark. They use butyl seal around the frame to seal it. I wonder if this is for easy removal of the frame for future fixes or needed glass replacement? I was contemplating whether to use silicone as you have, but worried for future repair if it would damage the frame if needed to be removed?

Great video thankyou

Exact same issue I have. If I remove that side/top trim to replace the sealant and the window is spun around so the outside is facing inside, will there be a risk of the glass detaching from the frame?

thank you

Hi mine has just started to leak from the same corner. I have easy access do I need to take the whole window out I am worried it will just fall and break. Or can I be done in situ

Ciao, io ho lo stesso identico problema, come hai risolto???

What silicon do you recommend - Thanks

If only I had a ladder long enough to get to the window outside 😔

I thought velux had a 10 year guarantee.

Not very good. Showing how it is done would have been quicker too

Bro it looked like my house

Advice : USE only original Velux repair kit. !!! Ask you Velux representative

Hi guys anyone come across how to rectify/ remove the water marks left on the wood inside when water has leaked through ? Any assistance would be appreciated ..Thankyou