tiling over asphalt

I have a customer that wants me to tile over asphalt...steps and risers etc.
i have used the watec3 system before for balconies and flat roofs but...how would you lot deal with this situation........if you can!......
you can also say you would not do the job...REFUSING is not the same as doing it wrong!!!!!!!!

i thought with a name like 'protiler' then you would be able to tell us?? lol

[grumpygrouter]

Checking the Ardex guide, it appears that assuming the asphalt is good, which it appears to be, you just need to use a leveling compound like Arditex and then use a flexy adhesive and grout.

Grumpy

grumpy..thanks for the post.......id love a copy of your ardex information....i called them and tech said no way!!!!!!

[grumpygrouter]

Log on to www.ardex.co.uk and navigate to "specifiers" and then "request literature. There is a section called Tiling literature set. I don't know what this gives but it sounds about right. My booklet is called "SytemArdex" Tile Fixing System. Don't know whay they won't send you stuff, you can't buy their products unless you know what they sell and where to use it.

Grumpy

[Pawelzik]

Hello protilers. My, resp. our, advice(s) acc. to your a.m. job and pictures is depending on your site conditions. Check this:

Any tiling, direct or with a drain system like Gutjahr´s Watec matting: You need a slope where any water can run to a draining point. So, have a slope or refuse the job.

Tiling with a drain matting system: As mentioned above, you need a slope and a point where the leakage water and surface rain water can run to. Adhesive and grouting acc. to. Gutjahr´s recommendations for UK.

For direct tiling: Slope needed as a.m.
Your asphalt seems to have a smooth surface. For the a.m. drain matting system okay butyou are not able to tile direct on it as you need a sanded asphalt surface as the adhesive needs it for better grip. If you don´t have that, you can´t tile direct and refuse the job.
If you have, you can tile direct buttering-floating by taking a C2-certified adhesive containing fine trass to reduce the danger of calcium carbonate spots which might occur within the years, especially at the stair riser grouting. This is something you should notice to your customer as it CAN occur and you can´t prevent.
Same with grouting: A grout containing fine trass would be my choice, better a flexible fine trass containing grout.

With regards from Germany, Martin