Side Edge Distance for Velux

[omits]

My Porch is 1.8m wide. I have a second hand Velux which is 1140mm wide but of course flashing around will need space.. I have concrete verge tile and the roof is Marley concrete Modern (rough) tile. Would this Velux fit in that width of 330mm each side? Thanks.

 

[DAZB]

Is the 1.8m external width or internal as you need to allow for the wall thickness too ? The width of a Modern is 330mm so will depend on your internal size.

 

[noseall]

My Porch is 1.8m wide. I have a second hand Velux which is 1140mm wide but of course flashing around will need space.. I have concrete verge tile and the roof is Marley concrete Modern (rough) tile. Would this Velux fit in that width of 330mm each side? Thanks.

Have you considered other factors like window height, ceiling joists, critical positioning, openable etc?

 

[datarebal]

critical positioning

This is important, its in the instructions.

But simply cut the tiles need be

 

[catlad]

As per the others have already alluded to, you will be crippling 90% of the rafters!
So a lot of care needed.