Preparing A Concrete Floor For Tiling - Floor Has Bitumen Down

[philrab66]

Make sure it is an SBR slurry, not just SBR, and one coat will suffice. The rest of your plans are fine 🙂

Just found this on interweb for the SBR slurry is this ok
An SBR bonding slurry is recommended to improve the adhesion of cement based mixes onto surfaces of low suction, and also as a treatment prior to applying any SBR modified mix. To produce the bonding slurry dilute SBR Bonding Additive with an equal volume of water then mix to a smooth creamy consistency with ordinary Portland Cement. The approximate mix is 1 part SBR: 1 part water: 5 parts cement (by volume) giving an approximate coverage of 30m² per 5 litres of SBR per coat. Following preparation of the substrate as detailed above the bonding slurry should be brushed vigorously into the surface giving an approximate 1mm thickness. Subsequent coatings must be applied while the bonding slurry is still wet. Should the slurry dry then a further coat must be applied.

 

[Qwerty]

I very detailed techy reply but yes, it is correct. Don't fret about the last part where it says about drying, one even coat is just fine

 

[philrab66]

I very detailed techy reply but yes, it is correct. Don't fret about the last part where it says about drying, one even coat is just fine

Hi Geoff
Can I just check one more thing do you have to wait for slurry to dry or when it is tacky?
Thanks Phil.

 

[Qwerty]

When it's fully dry. Should dry fly overnight

 

[philrab66]

When it's fully dry. Should dry fly overnight

Cheers Geoff.

 

[philrab66]

Find the lowest point and level it to meet the desired height elsewhere. A long level or laser will help

Got it down today it looks like there are a few dips in it. Looks like the sand has dropped into the hollows maybe to much water. Will see how it turned out tomorrow. Hopefully it will be good enough to tile on.

 

[Dan]

Any pictures?

 

[philrab66]

Any pictures?

Not good enough for pictures a right mess . I think It was a bit to much for me first attempt. There was a hump in the floor which is still there. I basically have what was there before but a bit higher. If it was just one room I think I would done ok but it was a kitchen through into hall.

 

[Old Mod]

Not good enough for pictures a right mess . I think It was a bit to much for me first attempt. There was a hump in the floor which is still there. I basically have what was there before but a bit higher. If it was just one room I think I would done ok but it was a kitchen through into hall.

U can get a grinding cup that fits to an angle grinder to reduce the size of the hump. Messy tho, but easier than latex!

 

[philrab66]

U can get a grinding cup that fits to an angle grinder to reduce the size of the hump. Messy tho, but easier than latex!

It is across most of the room and about 2 foot wide so I was going to cut it out and try and level it up, to much to grind off.