Velux outside foam

[Iwilldoit]

Thanks everyone

 

[catlad]

So just to check is the pictures the one that is standard now as its not quite the same as the old one.

Yes

I note an air of sarcasm in your tone

Not really its a diy forum.
If you want to experiment then let us know if it works. Done right it might work.

 

[Iwilldoit]

Ok I decided against the spray foam idea as I thought it would not be a good idea on the grounds of it sticking velux flashing to tiles and not allow any movement expansion.
So I bought the proper stuff. Cut to the profile of the wave of the tiles + a bit extra. Tiles were fitted corectly for a change IE nailed so lifted up the tiles as best I could to get the foam in the correct place it has self adheasive tape on the bottom. I cleaned all around the channels to aid water flow away.
The old foam was in a bit of a state, not fitted very well and covered in moss, it was all one height so bent over and not sitting right in places, also compared to the new foam it seemed like a sponge soaking all the water up, the new stuff is closed cel ? and seems waterproof. One side which is the damp patch side the cut tiles are cut on the up wave and so there is a taller gap on that side but hopefully sorted now..
Look at the state of what I pulled out.