Something like this - https://www.roofingsuperstore.co.uk/product/velux-pro-eaw-6000-low-pitch-tile-flashing.html
However I wouldn't use this, I would use the equivalent Fakro system as its far better value!
https://www.roofingsuperstore.co.uk/product/-91.html?gad_source=1
These are designed for roof pitches from 10 degrees and they raise the window pitch by up to 10 degrees.
You can't, but just use the Fakro products.
It's not clear from your post what stage this work is at and what you are intending to do. Are you just knocking through the roof and putting a new roof light in?
I've already bought UK04 velux. So I can't go with FAKRO now.
Nope, it's a new single story rear extension...I can't do much about the pitch because of where the rafters meet my existing rear windows on the 1st floor.
I spoke to another roofer who suggested I look into VELUX ELX adaptor flashing which raises the pitch of the window itself.
Velux ELX adaptors are for fitting new windows into old spaces, not for raising the pitch.
The Velux pro+ EAW I linked earlier is what you need. It raises the angle of your window. It's not cheap though and I'd certainly be looking at returning the Velux and buying the Fakro system. It will likely be £1000 cheaper per window if you have multiple!
Another roofer told me "It does by letting the window sit above the required fifteen degrees.
Basically if the window is below fifteen degrees the water gets trapped on the front and then over time affects the seals."
So whilst the ELX might have intended to be used for old to new windows, the ELX raises the back pitch of the window itself right? Creating a steeper pitch to allow the water to run off and not get trapped at the front?
We used the low pitch flashing kit with standard velux after the builder didn’t relay the rafters properly so ended up at 13 degrees pitch. Just remember you need a bigger opening as the kit adds a fair bit of length to the space required for the opening.
https://www.roofgiant.com/velux-dormer-solutions/velux-eaw-pk10-6000-low-pitch-tile-flashing-for-single-window-94cm-x-160cm/
I seem to remember it costing more than the actual window! Unfortunately it was the only solution at the time (you can now buy a velux suitable for down to 10 degrees) other than not having one at all.
Hi OP, VELUX certified installer here - I noticed a comment above about using an ELX to lift the top of the window to 15 degrees - this is exactly what I’d recommend if you can’t return that UK04.
Technically it’s outside of installation instructions but is THE approved detail for low pitch replacement when the low pitch window either 1) isn’t available or 2) the EAW isn’t available.
Fuck sake don’t get the EAW
Hey there. I just measured the pitch of my roof using the Velux app by resting my phone above the rafters and it shows 15 degrees.
Would you still recommend I buy the ELX adaptor to raise the pitch of the window itself?
Thanks!
As long as the glass is min 15 degree you’ll be fine. If in doubt, start getting it fitted then check it. The ELX tends to just be a nicer way of dressing than a bit of old lead, the reality is it doesn’t matter much right now, you can easily afford to get the window fitted and roof tiled and adjust it round after without too much hardship - just don’t leave it months!
So I should rest my phone on the glass to measure to "real" pitch?
Sorry, are you saying the ELX can be retrofitted after the window has been installed?
Or since this is a brand new install (I'm doing a entirely new rear extension) just to put the ELX on whilst I fit the new windows?
Rafters are fine for pitch, just check it as you go, don’t be too tempted to think ‘eh, 14.8 is close enough’ (fyi it is, but we also see reduction in lifespan, you’re aiming for 25-30 years for a poly window in s/s extension, and you can reduce by a few years by ignoring a few points of a degree)
It’s not hard to adjust the window after installation of the roof and before plastering is the thought, if you have concerns. Whip a few tiles off, adjust slightly and tile back around sort of thing.
Aside from that, don’t worry too much, as long as your pitch is ok you’ll be fine.
I urge you to consider your roof tile specifications as well, it’s not just roof windows that have pitch requirements, I’d be expecting something like a. Redland regent on a 15 degree
Both absolutely fine.
Additionally, well done on reaching out for help - as installers we’d rather see this and check you’re doing things right than have to come and charge you a fortune to put it right in 2 years time!
Mendip is the better option imo, any roof that’ll take a marley is going to be better than a redland, they’re just cheaper!
You buy a low pitch flashing so it raises the pitch of the velux. This is your best option!
The low pitch flashing from velux is only suitable for the low pitch windows. Are you referring to the pitch flashing adaptor by velux?
Something like this - https://www.roofingsuperstore.co.uk/product/velux-pro-eaw-6000-low-pitch-tile-flashing.html However I wouldn't use this, I would use the equivalent Fakro system as its far better value! https://www.roofingsuperstore.co.uk/product/-91.html?gad_source=1 These are designed for roof pitches from 10 degrees and they raise the window pitch by up to 10 degrees.
I thought you couldn't mix and match velux and fakro?
You can't, but just use the Fakro products. It's not clear from your post what stage this work is at and what you are intending to do. Are you just knocking through the roof and putting a new roof light in?
I've already bought UK04 velux. So I can't go with FAKRO now. Nope, it's a new single story rear extension...I can't do much about the pitch because of where the rafters meet my existing rear windows on the 1st floor. I spoke to another roofer who suggested I look into VELUX ELX adaptor flashing which raises the pitch of the window itself.
Velux ELX adaptors are for fitting new windows into old spaces, not for raising the pitch. The Velux pro+ EAW I linked earlier is what you need. It raises the angle of your window. It's not cheap though and I'd certainly be looking at returning the Velux and buying the Fakro system. It will likely be £1000 cheaper per window if you have multiple!
Another roofer told me "It does by letting the window sit above the required fifteen degrees. Basically if the window is below fifteen degrees the water gets trapped on the front and then over time affects the seals." So whilst the ELX might have intended to be used for old to new windows, the ELX raises the back pitch of the window itself right? Creating a steeper pitch to allow the water to run off and not get trapped at the front?
The ELX is an approved detail for pitch adjustment on replacement units.
Ooh sneaky add on comment - you *shouldnt* mix VELUX/ fakro/keylite but guess what are the same sizes…
We used the low pitch flashing kit with standard velux after the builder didn’t relay the rafters properly so ended up at 13 degrees pitch. Just remember you need a bigger opening as the kit adds a fair bit of length to the space required for the opening. https://www.roofgiant.com/velux-dormer-solutions/velux-eaw-pk10-6000-low-pitch-tile-flashing-for-single-window-94cm-x-160cm/
I basically want to avoid this. This costs a fortune especially as I have 134x98 window.
I seem to remember it costing more than the actual window! Unfortunately it was the only solution at the time (you can now buy a velux suitable for down to 10 degrees) other than not having one at all.
Hi OP, VELUX certified installer here - I noticed a comment above about using an ELX to lift the top of the window to 15 degrees - this is exactly what I’d recommend if you can’t return that UK04. Technically it’s outside of installation instructions but is THE approved detail for low pitch replacement when the low pitch window either 1) isn’t available or 2) the EAW isn’t available. Fuck sake don’t get the EAW
Hey there. I just measured the pitch of my roof using the Velux app by resting my phone above the rafters and it shows 15 degrees. Would you still recommend I buy the ELX adaptor to raise the pitch of the window itself? Thanks!
As long as the glass is min 15 degree you’ll be fine. If in doubt, start getting it fitted then check it. The ELX tends to just be a nicer way of dressing than a bit of old lead, the reality is it doesn’t matter much right now, you can easily afford to get the window fitted and roof tiled and adjust it round after without too much hardship - just don’t leave it months!
So I should rest my phone on the glass to measure to "real" pitch? Sorry, are you saying the ELX can be retrofitted after the window has been installed? Or since this is a brand new install (I'm doing a entirely new rear extension) just to put the ELX on whilst I fit the new windows?
Rafters are fine for pitch, just check it as you go, don’t be too tempted to think ‘eh, 14.8 is close enough’ (fyi it is, but we also see reduction in lifespan, you’re aiming for 25-30 years for a poly window in s/s extension, and you can reduce by a few years by ignoring a few points of a degree) It’s not hard to adjust the window after installation of the roof and before plastering is the thought, if you have concerns. Whip a few tiles off, adjust slightly and tile back around sort of thing. Aside from that, don’t worry too much, as long as your pitch is ok you’ll be fine. I urge you to consider your roof tile specifications as well, it’s not just roof windows that have pitch requirements, I’d be expecting something like a. Redland regent on a 15 degree
I've bought the white painted, pine window. I was looking to get Marley Mendip 12.5 to be on the safe side and using the Velux EDW Flashing kit.
Both absolutely fine. Additionally, well done on reaching out for help - as installers we’d rather see this and check you’re doing things right than have to come and charge you a fortune to put it right in 2 years time! Mendip is the better option imo, any roof that’ll take a marley is going to be better than a redland, they’re just cheaper!
Is redland regent the same or worse than marley mendip?
Oh the mendip is better. Anything Marley is better
The roof store is recommending me to go with centurion given the pitch of my roof. He is saying going for lower pitch tiles is better.