Pebble dash chimney repair.

[alexmc123]

We have a 3 story Edwardian house with chimney stacks either side. The one facing south takes the brunt of the weather, and we have always had slight damp issues eminating from it when the rain drives very hard in a southerly gale. A few months back I awoke in the night to very high winds and a nasty crash and crunch and slither sound!
Next morning the below had happened, not much damage to the tiles and a plastic gutter taken out, but now the scaffold is up and the house front to be painted and the damage repaired.

I am happy to have a go myself, having done many different construction and building things, albeit not to a prefessional level, but good enough for us. I've looked up Youtube videos on pebble dashing, but most seem to be mush smaller grained pebbles or chips, often much whiter in colour. Can anyone help me out with identifying the pebble aggregate shown here?
I assume I will have to carefully remove all loose pebble dash and render before re-dashing. Beyond that are there any treatments for the brickwork before rendering?
Any help is very much appreciated.


http://imgur.com/02WsGDz
http://imgur.com/Ba7xhsu
http://imgur.com/4QY0Q7w
http://imgur.com/e4H5I7P

 

[vinn]

For you to go and work on that roof on that high chimney stack you would need a roof scaffold platformed around the stack. Thats plus the in position scaffold you now have.
You would need a hop-up or short steps off the platform if any work was needed on the flaunching.

Remove all the four sides of rendering back to brickwork & open up the beds .
Your plain tiles where they abut the stack junction need soakers and cover flashing on three sides.
The dash is possibly a mixed colour spar - go to a local builders suppliers yard and see. Take some debris with you.

Have all 4 flues swept.

Where were your damp issues?

 

[Doggit]

It also looks as though the render is coming away on the front and the back of the chimney as well, so you'll need to hack these of before you do the job. You'll need to work out how far you have to go before you can start rendering.