Following a post by David Wall on yesterday's entry I found some people discussing bitumen and parquet. One person had used a product called Synthaprufe to lay his blocks. I did a Google and found some info on it. I then filled in their online enquiry form to find out more about the product and its suitability. Ten minutes later I got a mail back saying simply "Somebody needs help!". Charming I thought and wrote back to Jenie asking if this was a good way to deal with potential customers. Ten more minutes later I got a phone call and an apology. Jenie was new and has hit reply instead of forward. I'd thought this when I read the mail and had checked for a CC/BCC address. Apparently she has been reprimanded. Not sure what that means.
Anyway, the guy I ended up speaking to to was really helpful and had actually had experience with people laying parquet. He said that Synthaprufe Original is ideal. He would though wouldn't he? Well, no, you see the company is based in Matlock and this was a salt-o-earth kind of guy. We had a good chat about it all and I came away trusting him that this was what I was looking for.
Apparently the thing to do is lay my concrete floor and coat it with a 6:1 water dilution of Synthaprufe. This gives it a water-proof membrane. Then you simply paint the bottom of each tile with a thin coat of this bitumen paint and slap it down.
So, I've figured out how to stick the blocks down. All I need to work out now is how to deal with "self" levelling the floor to the required depth. Anybody know anything about self-levelling concrete? Is there a maximum depth?