R
roylec
I have just looked at a job in a flat with a 6m x 3m terrace balcony. The surface is asphalted to protect the flat below, and there are cheap and ugly non-slip concrete tiles applied by the builder about 10 years ago. It looks like they were glued on as they are laid tight to the asphalt with no adhesive layer I recognise. They will probably (hopefully) lift cleanly without damaging the underlying asphalt. These tiles are only 8mm thick (inc. the tread), so I am tempted to lay on top, although I would have to make up the 8mm where the tiles are proud of the edges by about 200mm
The customer was originally going to build a deck on the surface, but doing so would mean raising the floor level by at least 200mm, and that would require a new balustrade. So they have asked me to come back with some options for tiling.
To be honest, I have never tiled externally so I don't really know where to start. My first thoughts would be to quote on natural stone tiles so the surface is reasonably non-slip, and for preperation and laying something like:
- lift the existing concrete tiles;
- repair any damage to the ashpalt with a liquid bitumen.
- seal the floor with a coating of some external product like the old "black jack".
- use a BAL external waterproof adhesive;
- lay as a normal floor and grout with a BAL waterproof.
However, this job makes me nervous, so any advice you have about the approach, treating the substrate and the materials I should use would be helpful. ...and of course any gotcha's to look out for.
The customer was originally going to build a deck on the surface, but doing so would mean raising the floor level by at least 200mm, and that would require a new balustrade. So they have asked me to come back with some options for tiling.
To be honest, I have never tiled externally so I don't really know where to start. My first thoughts would be to quote on natural stone tiles so the surface is reasonably non-slip, and for preperation and laying something like:
- lift the existing concrete tiles;
- repair any damage to the ashpalt with a liquid bitumen.
- seal the floor with a coating of some external product like the old "black jack".
- use a BAL external waterproof adhesive;
- lay as a normal floor and grout with a BAL waterproof.
However, this job makes me nervous, so any advice you have about the approach, treating the substrate and the materials I should use would be helpful. ...and of course any gotcha's to look out for.