Hi Have Ditra under slate tile around a very old pool. Some tiles are loose so am having them put back down. Question has come if the Ditra is loose from the slab should we 1) take it up and go without the Ditra 2) take it up and put down new Ditra 3) take it up and thin set the old Ditra back down Thank you

We recently bought a house here in the DFW area, and I've been doing some looking around at the various imperfections on the exterior that need correction. On the front of the house I've got a corner where the bricks meet at an edge that is mortar all the way from top to bottom. [ATTACH]50071[/ATTACH] The mortar is crumbling and falling out, and I'd like to fill it in. Here's an up-close shot. The gap is about a half inch, and it looks like the void space goes back about two inches. [ATTACH]50072[/ATTACH] How do i go about filling this in. I've never done any kind of brickwork/masonry, so I'm a complete noob in that regard. I've read a little on tuckpointing/repointing, but all the examples seem to focus on your basic vertical brick wall mortar joints. Should I be using backer rod here? Should I use the the typical mortar mix with pointing trowel? Or are there specialized tools for this particular application. :help: Thanks