The fault finding and repair you have done is better than most professional roofers would ever do. The video is really well filmed - great job. Well done and thanks.

An exceptional explanatory video. I wish all videos on KZfaq were this clear and to the point. Our newly installed velux roof light is leaking in the exact same place. The builder has said he will fix it, but good to know it is a relatively easy fix if, for whatever reason, I need to do this myself. I'm sure it takes time a lot of time and effort to produce a video like this for the benefit of others - thank you for going to the trouble, I really appreciate it.

Very helpful video. Just had exactly the same problem. The breathable membrane underneath was overwhelmed by the quantity of rainwater. The foam “seals” had perished after 10 years. Used the same product you did. And made sure there were no gaps. Hopefully this will sort the issue.

Your front apron flashing also has only about 50mm lap onto the course of tiles in front of the velux, also bend the metal apron flashing back on itself forming a welt, on the first cut tile on eitherside as water can still track side ways and finally reseal all exposed screw fixings as these also fail, good work though if you are a diyer.👍

I was thinking of replacing my 2 old velux windows because i have this problem with 1 but im intending to do a little survey because i think you have found the problem . The modern throw away age is a curse.

I have had rain water issue with mine for over a year . had roofer look at it . still leaking . i have just ordered the suggested strip in your video and i'm going to try it. thanks fingers crossed.

brilliant got a leak in Estonia 🇪🇪 on my 1 of 4 velux

Forgive my ignorance, but I am surprised that given the fall of your window the cause of the ingress is the foam under the tiles - I would have thought that so long as the channels were clear and the flashing at the top is in good shape, this should have run off without a problem. I am faced with a similar problem on a much gentler fall (questionable really whether a velux should ever have been fitted) and will certainly try this as well as checking around. It has functioned for 10 years without a problem so I was hoping it might have been moss growth. Difficult to access which is why I haven't been able to diagnose it properly yet.

Absolutely brilliant. Followed your advice. Had similar issue. Many thanks

Remarkably similar roofing to what we have in Australia. And yes that Velux foam just turns to dust like an Egyptian mummy! A disgrace for an expensive product IMO.

How I fixed rain water penetration on my velux window. Please let me know if this helped you

The velux must be fitted gauge with tiles & battens this is a must or they don’t get roofed in properly 👍

Thanks a lot for this excellent video and for including the link to the actual material you used. Very few people on KZfaq care to do that. Also, great to see how you worked around varying profile shapes by shaping the foam. Which tool did you use to so cleanly and smoothly shape the foam profile when you attached two strips on top of each other? A normal Stanley knife or did you have something else? All the best.

Basically the real problem is the Velux flashing kits for tiles are woefully inadequate unlike the slate flashing kits which work quite well.

great work

Yes I think surprisingly those seals completely perish.

Battling with new velux. Lots of leaks. Builders installed a flashing kit EDW SK10 2000 (red line) with a blue line GGL SK10 3070. Is this a mismatch given the different colours? Would be so grateful for any advice.

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

Thank you

Thanks from Rochester,NY

Great Video... Did it work? Has the ingress stopped?

Thanks for the really great video. Did you not think about just using spray foam which might have been a lot easier?

Das Fenster ist zu hoch eingebaut und die Ecken vom brustblech müssen umgekantet werden....

Did it leak after ?

Bend the corners on the front flashing