I've got a small damp patch inside the house, not too bad but needs fixing. On the outside in the same location there is a downpipe from the gutter which was blocked and hence water was running down the external wall. It's now unblocked and working correctly. However, I'm concerned that the blocked pipe wasn't the cause of the internal damp. Photos here:
https://s13.postimg.org/os75g1eh3/20170612_213552.jpg
https://s13.postimg.org/azxby5d3b/20170612_213616.jpg
Q1. There's a hole around the downpipe where it enters the tarmac (public pavement). Is this a problem? I assume that it just allows a bit of additional water to enter the drain/sewer. The angle of the pavement means that water runs away from the wall rather than towards it and down the hole, i.e. it's not overloaded. I'm more worried about debris getting washed down it and blocking it further down.
Q2. The rendering on the wall doesn't extend far enough down to meet the tarmac (public pavement). There is a feasible gap where water could contact the brickwork. Is this a problem? Should the rendering meet the tarmac, or is a gap intentional?
I'm tempted to fill the gap around the downpipe with some mesh to prevent stuff falling down the hole, and then put some tarmac over it to cover the hole, and bridge the gap between the rendering and pavement. Would this be worthwhile, make no difference, or actually cause harm? Anything better than tarmc from a bag for this job?
I don't want to call a damp company and get taken for a ride, so I'm trusting UKC on this one!
Many thanks.