Mapei renovation screed primer

[EatingSnakes]

Hey guys

I've got a new, tampered concrete floor.

Not sure if I need primer before applying Mapei Renovation Screed

If yes, I've got a ton of SBR. Will this work?

The screed will be containing UFH pipes.

Thanks

ES

 

[Italy]

.............

 

[Qwerty]

As above, it's always best to follow manufacturers instructions and use the same primers. You could phone Mapei technical dept tomorrow and ask your question but I'm pretty sure they will stick to the primers listed above. They may possibly say that Primer G will suffice but to be honest your SBR will work and plenty here would use it with no issues. It does also depend if it is the correct type of SBR

 

[EatingSnakes]

Thanks guys

Yeah I had a good search of the forum and have seen plenty of people use SBR but just wanted to make sure as its my first time.

Its ever build brand Bonding SBR

 

[One Day]

I'd be happy using SBR. Diluted probably 3:1 as everbuild is quite diluted anyway.
Make sure you're not bonding dust though - vaccuum first.

 

[EatingSnakes]

Thanks mate.

So that's 3 parts SBR to 1 part water.

Thanks so much

 

[Wayne Brown]

What sort of underfloor heating going down? Electric or a wet system any insulation going down first

 

[EatingSnakes]

Wet.

got 100mm kingspan in place.

 

[Wayne Brown]

Like this ? 100mm celotex laid on the slab a polythene dpm laid on top the celotex and cut and taped expansion foam strip added all around the perimeter of the room and structures this one will have a flow screed pumped in to a 90mm thickness , please explain how your floor is being done em I missing something?

 

[EatingSnakes]

From bottom to top:
DPM
100mm Kingspan
DPM
100mm concrete
16mm pipe
28mm mapei renovation screed
Tiles