Crack between extension and house

[georgeca]

Hi,

I noticed the extension (Built approx 10 years or so ago) has moved away from the house slightly (See pics). There is a visible crack forming on the outside, nothing showing inside, apart from some damp which I assume is due to rain coming in from the crack.

My question is what would be the best way to fix this? I have posted countless jobs on site like mybuilder, check a trade etc and not one person has responded. I know of a plasterer who can come render it, but is that enough? Someone mentioned I should have a render drip bead installed, but not sure what that is or if its necessary. Any suggestions would be great! If I knew exactly what I should i get done, it would probably be easier to find tradesman for the job! Thanks

 

[DAZB]

It appears that the leadwork is coming loose from where it was mortared into the wall, photo 2 shows the lead has slipped, so nothing major. All it needs is raking out and refixing using lead plugs or fixing clips designed for the job and then repointing up with some paint to finish. A roofer or builder could do it but it is not beyond a competent diy'er too.