Ceramic Tiling Concrete Floor preparation Advice needed

[Mike Mike]

Seems like everyone has there own method for this job :smilewinkgrin:

I ended up giving Mapie a call and they advice I remove as much paint as I can then Prime with There primer G before applying there Ultraplan restoration screed Self leveling compound,

So I've purchased the above with a angle grinder for the paint,

Removing the paint is going to be a ***** but I'll give it a go:mad2:

Now that's interesting. That is EXACTLY what I suggested to someone about a week ago, except sand with a rotary floor machine instead of an angle grinder, to remove and loose or flaking paint, prime with Uzin acrylic primer then trowel on a thin coat of smoothing compound, leave 2 hours then begin tiling. And I got no end of abuse and nonsense from people who have never done anything other than spend 'n' hours filling the house with (probably toxic) dust by trying to get all the paint off with an angle grinder! And despite the fact I've beend doing exactly that for 18 years and never had an installation failure, or a problem.

Seems the Tech Dept at Mapei also know what they're talking about...

Before you spend money on an angle grinder (sounds like you don't own one), see if you can hire a rotary floor machine. If you can, it will be a hundred times faster to sand the paint down to an acceptable level. Et voila, even in England, rotary floor sanders exist. HSS Hire - Commercial Floor Finishing Sander Hire and Rent Seems a bit of a lightweight one, stick a bag of self levelling compound on top of it while you're sanding to give it extra weight, and use the coarsest sand paper they have (24 grit, or even 16 if they have it).

That's what I'd do. A lot less dust and crap all over the house, and you'll sand it within 45 minutes. Once you've put your Mapei SLC on and it has dried, wizz over it with the sander again (10 minutes) and you're ready to tile.

 

[charlie1]

Hi Paul, I'm interested on the advice you got from mapei! They advised using primerG with renovatiion screed? I called them a few weeks ago and there tech dept categorically advised Eco prime with this product and not primerG! ....I'm confused!

 

[charlie1]

Btw Paul, I don't know what your tiling skills are like, so I would always advise in putting down a thin layer (about 3-5mm) even if you think your floor is flat! At this thickness a 20kg bag will cover 3-5m2, it will make your job much easier.

Good luck mate

 

[Qwerty]

I have always used Primer G prior to pouring Ultraplan Ren Screed based on advice from Mapei tech at the factory when I last visited. No problems to report here

The tech sheet does indeed mention Eco Prim T and not Primer G.......
http://www.mapei.com/public/GB/products/4007_ultraplan renovation screed_uk.pdf

 

[charlie1]

I have always Primer G prior to pouring Ultraplan Ren Screed based on advice from Mapei tech at the factory when I last visited. No problems to report here

The tech sheet does indeed mention Eco Prim T and not Primer G.......
http://www.mapei.com/public/GB/products/4007_ultraplan%20renovation%20screed_uk.pdf

Thanks blocko, might give it I try then as have heard very good reports but the price of the eco was putting me off!

 

[Ajax123]

EVERYONE has given him the wrong advice here. What is the matter with you lot.

You don't have to remove any paint, or waste any money on Ditra mat.

Just spread out a layer of sand about 1cm thick over the floor. Then re-screed it 10 cm thick, and use some reinforcing matting (stainless steel). Leave to dry for 10 weeks. They tile directly to it. The sand will act as a de-coupling membrane (same as Ditra, but much cheaper). This is how it was done for the last 3,000 years.

You see, there is ALWAYS more than one, two, or even three, ways to skin a cat... :lol:

Blimey....talk aboutretro...

 

[Diamond Pool Finishers]

if you go to a tool hire shop and hire a needle gun and give that a go first to remove the paint, then if that's no good take it back and ask for a scabbler, this will deffo removethe paint........

 

[Ajax123]

if you go to a tool hire shop and hire a needle gun and give that a go first to remove the paint, then if that's no good take it back and ask for a scabbler, this will deffo removethe paint........

Hmmmm.... A needle gun is a scabbler??

 

[Mike Mike]

Hmmmm.... A needle gun is a scabbler??

LOL, I was going to ask what "a needle gun" was because I've never heard that term before.

A scabbler is a bit OTT for getting paint off a floor (great if you want to remove half the floor). Rotary sander will get all the loose paint off, and will key the ingrained and well stuck paint ready for receiving primer and SLC. I'm doing my basement toilet precisely with this method this weekend, and did my laundry room last week. I honestly don't see what all the fuss is about re trying to remove all the paint??? It's paint, not the bubonic plague :lol:

 

[PaulJ220]

Hi Paul, I'm interested on the advice you got from mapei! They advised using primerG with renovatiion screed? I called them a few weeks ago and there tech dept categorically advised Eco prime with this product and not primerG! ....I'm confused!

Yeh charlie I was first adviced to use the Eco Prime but that wasn't instock at my local stockist so Mapei said Primer G would also be fine As they did have that in stock,

I Bought a dewalt grinder so I'm going to give that ago on the paint, Just waiting for my attachments to arrive so I can crackon with it, Even if i don't remove all the paint I can give it a damn good keying :smilewinkgrin:

Cheers for all the great adivce though peeps