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Hello, I've just had two Velux windows fitted to an extension. The roof pitch is approx 12.5 degrees.
First off, the underslating. All underslating should overlap, but at the top of the window it comes inwards, underlapping. Now, if we were to get wind driven rain, this is going to come inside isn't it? The tiles are concrete interlocking, are they good at preventing wind driven rain even at lower pitches?
Arrows show 'underlapping' at the top of the window.
Second photo showing the window flashing. What concerns me here is where arrowed, is standing water. What will drain away will only be what 'overflows' from this area. I'm thinking this flashing kit is not suitable for this pitch. It is the EDJ kit, which from my research suggests this is not suitable for anything below 20 degrees.
I would like your thoughts before I address this with the builder as I do have some apprehensions over this. Otherwise, I am happy with the work so far.
Thanks.
Edit: Arrows from photo have dissappeared, but hopefully they are clear enough for you to see.
First off, the underslating. All underslating should overlap, but at the top of the window it comes inwards, underlapping. Now, if we were to get wind driven rain, this is going to come inside isn't it? The tiles are concrete interlocking, are they good at preventing wind driven rain even at lower pitches?
Arrows show 'underlapping' at the top of the window.
Second photo showing the window flashing. What concerns me here is where arrowed, is standing water. What will drain away will only be what 'overflows' from this area. I'm thinking this flashing kit is not suitable for this pitch. It is the EDJ kit, which from my research suggests this is not suitable for anything below 20 degrees.
I would like your thoughts before I address this with the builder as I do have some apprehensions over this. Otherwise, I am happy with the work so far.
Thanks.
Edit: Arrows from photo have dissappeared, but hopefully they are clear enough for you to see.
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