Bitumen dilema !! urgent

[bobski]

Hi Guys

I'm about to tile my kithen floor but heard heard so much conflicting advice about the above.

Bitumen is about 1" thick and is hard and fairly smooth and flat. I have already bought bal SPF (not rapid as i'm new to this) to tile 400x400 porcelain tiles.

My question is about prep, should I

1 prime with bal bond SBR and tile with SPF

2 Pour SLC laytex version then tile with spf

3 prime with Webber PR301 then tile with SPF

What would you guy's recomend?

Rob

[tile55]

Personally I would take off the bitumen then prime and tile.

[CJ]

#1

Bal SBR....then SPF

[Daz]

I've done loads of floors with a bitumen base.

I always prime then SPF, never had a failure.

[andy tiler]

bobski prime with weberpr301(iboprim) this is a 2 part bonding primer promotes adhesion to difficult substrates such as exhisting tiles and flooring grade ashfelt and then spf good luck

[cornish_crofter]

The bitumin is most likely the damp proof 'membrane'.

If it were my floor I would probably want to remove it, dig down and put down a proper .3mm damp proof membrane and screed over that with sharp sand/cement mix.

However I am good at overkill sometimes. As CJ and Capt Slow say should be fine.

[GirlRacerRed]

Hey Bobski
I have a bitumen damp proof membrane in my kitchen and I've tiled it before Christmas. Primed it and then used flexi adhesive and grout. Not had any problems with it. But listen to the pro's on here, they have some excellent advice to share.
GRR

[bobski]

I dont think its a membrane as I hacked up some small high spots and floated with sand and cement.

There was like a copper sheet which was the DPM is the same for the brickwork.

Still tempted to prime and SPF

What a dilema, I won't sleep tonight!! as im starting in the morning.

[cornish_crofter]

No, it won't be a membrane as you and I will know it.

It will be a damp proof layer. It will be in place of a membrane. If you leave it intact then you should be OK. Dig holes in it then you could have problems.