Sealing a metal roof

[Isolde1]

Hi, I've just bought a house near Dumfries, that has a metal shed/lean to, attached to the external wall of the house. It's really handy, BUT there's a huge gap between the metal roof, and the wall, so everything inside gets wet (obviously!) when it rains. How can I seal the gap, and make it weatherproof? I've included pics of the "shed" and the gap. Thanks for any advice!

 

[magicmushroom666]

I think you need a lead flashing that is cut into the wall

 

[Tigercubrider]

Flashing
They (the roof manufacturer) may do a folded metal section that you could chase into the wall

 

[Isolde1]

Thanks for both your replies.
It's just a corrugated metal roof, so I think getting someone to come and do that (flashing) would cost more than buying a new shed! Was hoping for a DIY solution, but maybe that's not an option.

 

[Harry Bloomfield]

Thanks for both your replies.
It's just a corrugated metal roof, so I think getting someone to come and do that (flashing) would cost more than buying a new shed! Was hoping for a DIY solution, but maybe that's not an option.

You can buy stick on flashing on a roll, but how well it might stick to that wall is difficult to tell. Its made from some sort of plastic. I used some around ten years ago and its still going strong.

I wonder why it was built with such a wide gap between it and the wall?

 

[Alastairreid]

Flashband and 4x1" screwed to the sheeting and wall.

 

[Harry Bloomfield]

Flashband and 4x1" screwed to the sheeting and wall.

Thanks, that is the stuff I used. I think the OP might need a double width of it, to span that gap and deal with the corrugations...
https://www.screwfix.com/p/bostik-flashband-grey-10m-x-225mm/22704

 

[catlad]

Those metal roofs are prone to condensation so the gap may have been left on purpose.

 

[Harry Bloomfield]

Those metal roofs are prone to condensation so the gap may have been left on purpose.

Yes, but rain will hit the house wall and run down it into the shed.

 

[Tigercubrider]

That's why the flashing solder for the corrugated roof is basically a straight bit of metal, folded to meet the wall, but leaving each lower section open.

 

[Leofric]

An abutment flashing to suit the profile of the roof sheeting, with a lead flashing turned into the wall and dressed over the upstand of the abutment flashing.