Has anyone installed Velux windows into roof with corrugated sheet roofing?

[Great_scot_selfbuild]

Anyone willing to share an example of a construction drawing showing the installation of velux in a roof with corrugated profile sheet covering, plus advice on the flashing kit?

 

I'm wanting to install the 7 x velux roof windows (940x1600) ourselves and looking for advice on which flashing kit we would need and how it will fit into the structural opening. Grateful for any experience / advice. We have all the other windows being installed by the supplier and although our builder could no doubt do these, I'm looking at which tasks we could manage ourselves and try and grapple some control of labour costs where it is more manageable for us to (perhaps) do.

 

The installation would be timed to take place whilst scaffolding is still in place and I'm expecting the windows to be lifted in place from inside the house.

 

Our fixed rooflights on the garage had huge up stands the windows simply sat on, whereas the rooflights openings for vellum have a structural opening (windows = 940x1600, structural opening = 960x1620) and we haven't yet received the construction drawings fro the architectural technician yet (on holiday until early Sep) - looking to understand what we should expect in advance of receiving the drawings. We'd like the velux to be flush with the roof rather than on upstands, and our roofing material will be plasticol coated corrugated (here - https://www.panelsandprofiles.co.uk/wp-content/uploads/2014/03/TPP-14-3-CORRUGATED-Roof-Load-Span.pdf) - photo of the finish attached as used on our garage.

 

Cross-section of a building regs drawing attached to show the section view with the velux window positions.

 

Our searches of Velux flashings for sheet profile roofing has led us here: https://www.roofingsuperstore.co.uk/browse/roof-windows/pitched-roof-windows/velux-flashings/filterby/code/edw.html

 

TIA...

[JamesP]

I used EDW for fitting 7 Velux in Tata Standing seam roof.

All I can add is take your time with the detail and an extra pair of strong arms for the lift.

Have a look at this for starters.

 

[Bramco]

@Great_scot_selfbuild

 

We didn't use Velux - hate the stand up edges.   We did use the Roofmaker skylights that it looks like you have used on your garage.  Ours are flush with the corrugated roof. Essentially you have to leave a large gap at the bottom of the roof light, create a slight slope and then mold a water resistant membrane across that and onto the top edge of the roof below the roof-light.

 

Ill have to check with the builder and architect what we eventually used - was 3 years ago.  EDIT: checked and we used -> https://www.deks.co.uk/fast-flash

 

See photo - I have the architects drawings for this if you DM me.

 

 

PS What's the reason for using Velux rather than the Roofmaker roof-lights?

 

 

Edited 8 hours ago by Bramco
flashing product link

[Great_scot_selfbuild]

2 hours ago, Bramco said:

@Great_scot_selfbuild

 

We didn't use Velux - hate the stand up edges.   We did use the Roofmaker skylights that it looks like you have used on your garage.  Ours are flush with the corrugated roof. Essentially you have to leave a large gap at the bottom of the roof light, create a slight slope and then mold a water resistant membrane across that and onto the top edge of the roof below the roof-light.

 

Ill have to check with the builder and architect what we eventually used - was 3 years ago.  EDIT: checked and we used -> https://www.deks.co.uk/fast-flash

 

See photo - I have the architects drawings for this if you DM me.

 

 

PS What's the reason for using Velux rather than the Roofmaker roof-lights?

 

 

@Bramco that looks like a very tidy finish. Our garage roof lights were actually from here - https://saris-extensions.co.uk/shop/skylights/pitched-roof/

 

but we’re looking for opening roof windows and part of the velux draw was the ability to plug in electric powered blinds and u-value. Not that we’ve committed yet so I’m continually reviewing options. 
 

What cladding is that you’ve used? Looks great. 

[Bramco]

@Great_scot_selfbuild - thanks, I'll tell the builders next time I see them.

 

Those saris rooflights look exactly the same as the Roofmaker rooflights we used -> https://roof-maker.co.uk/products/hinged-opening-flat-rooflights/.   Think they do these in a variety of glass types/u values.  Ours are triple glazed as in the link and work very well.   

 

On the blinds aspect, ours are in the living space and bathrooms and on a landing, so we're not worried about having blinds.  Wonder if @JamesP has blinds?  If you're thinking blinds to cut out solar gain, then maybe it would be enough to simply open the roof lights to dissipate the heat. Works for us.

 

The cladding is Greencoat (afaik) specced for longevity.  I can check the exact spec if you need that.

 

Here's a link to the architect's web site with more photos -> https://lhc.net/projects/ashcroft-creating-a-low-energy-family-home/