Preparation of bitumin floor

im going to tile over a solid floor which has a thick layer of bitchumin over concrete. House probably built in the fifties. Tiles are porcelain my question is - What is the best method to prime or prepare the surface for tiling. Will be using topps own standard set addy
 
Remove any large deposits with a scraper and then prime with a SBR/ cement slurry or use a grit primer (prime & grip or eco prim grip)
Any pics?
 
Are you sure it is bitumen .
I've worked in ex council houses that had a red resin type floor down , I'm sure someone on here will know what that was, I can't remember the name ,
 
At 20mm built in the 50s be careful as it could be magnesite. These were often red, green or black and they will not take a tile adhesive or slurry. A quick easy test would be to use an electric damp meter like the ones used for testing rising damp. If its magnesite the moisture reading will be very high or off the scale
 
Is the colour of the floor black black(bitumin) or a deep burgundy (black pudding) colour?
I used to live in a 50's house, where the whole ground floor was supposedly levelled with a 20mm burgundy coloured coating, matt in colour.
 
Is the colour of the floor black black(bitumin) or a deep burgundy (black pudding) colour?
I used to live in a 50's house, where the whole ground floor was supposedly levelled with a 20mm burgundy coloured coating, matt in colour.
That’s called ‘Magnasite’ and is a banned substance now.
It soaks up water like a sponge.
They also used to use all manner of fillers in the product.
The most dangerous of all was asbestos.
It should be removed before work commences.
 
Haha I’ve just seen Alan’s post 🙂
Twice is better than none at all... at least that's what my Mrs says... magnesite was dreadful stuff though. Still an awful lot of it out there. It was mainly used in council houses....
 
try reading up on BAL FLEX BONE if the floor is flat and smooth just lay over and tile
That's a good point Ray. Would be interesting to see if they would recomend it over magnesite. Cant see why not...
 
Thanks for the replies to date really appreciate
I have included some pics hope this helps.
underneath the bitumen is a concrete screed
The light bits on the bitumen are paint and plaster splashes

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177.jpg
 
That's a good point Ray. Would be interesting to see if they would recomend it over magnesite. Cant see why not...
as far as a know from lewis the rep can be used on ant flat surface just ordered 6 rolls to day for a calsium screed floor we are doing next week and no sanding yesssssssssssss🙂
loose a day preping but gain a day laying so making more money win win 🙂🙂
Not if the floor has issues with damp.
its a bitumin floor quite thick last i heard bitumine is water proof also flex bone is breatherble
 
Ok from the pics its not magnesite. It looks like old fashioned blackjack. I would just check moisture. If dry cement slurry and tile. Or use the flexbone whuch actually looks pretty good.
 

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