Hi Guys, this is my first post, hope someone can help. I am laying ceramic tiles onto a sanded asphalt floor (internal porch), the asphalt looks flat but I had to fill gaps at the edge along the door and noticed that the asphalt was not too thick and there was some sand below. I am not sure how thick teh rest will be, I am hoping that this was thinner as this was an edge, it also dipped a few mm from the main floor area. My concern is will there be any flexing, I've been advised that I should use Dunlop rapid set plus (which is supposed to have some flex) along with a standard grout and also the same adhesive with a flexible grout.
Could anyone confirm the best solution?
thanks

I would use spf adhesive with a flexible grout, Just make sure the asphalt is not to thin

It does not sound too good a surface to tile onto. Make sure its well stuck and use a SPF adhesive if the bitumen is old and fully cured.

Bitumen or Flooring grade ashphalt?

do it in sand and cement and put wire mesh through the bed if you have the threshold height this will be the best solution

thanks for replies,
asphalt is flooring grade, well cured
there is not enough height to do the sand/cement option

can anyone give more detail on spf? is this BAL spf? or are there any other products I can use, (I assume the Dunlop Set Fast Plus is not spf?)

thanks again

I would be using mapei Keraquick plus there grout as well, It's whats available in your area

You can use any a spf on flooring grade ashphalt. Check it's sound not brittle or soft, and nice and clean.
Set fast plus, is an spf so yes, you can use it

Originally Posted by Branty

You can use any a spf on flooring grade ashphalt. Check it's sound not brittle or soft, and nice and clean.
Set fast plus, is an spf so yes, you can use it

You wouldn't Prime?

Nope, make sure its sound and clean.

thanks for everyones help, much appreciated!

i would always use flexi adhesive on any asphalt surface with flexi grout bal spf is a single part flexi you could use a porcelbond adhesive for asphalt