Tiling Exterior Porch Area Walls

[gordybaillie]

Good Morning

I have a job where the customer would like their exterior porch area walls tiled. The walls I guess are not directly exposed to the elements although the Porch area is open (no door as its a sheltered area at the front door).
The walls are painted render and I am looking for help on the preparation of these:
- Should I fit hardiebacker first?
- Scrap off paint to leave a surface the adhesive is able to bond to?
- ?

Thanks in advance for any help! - not got any pics to help you visualise im afraid.

 

[Time's Ran Out]

Sand off all the paint and get back to the render.

 

[hmtiling]

Then prime and tile with a decent powder addy that's suitable for exterior work

 

[Time's Ran Out]

Although every surface has to be judged separately , you don't want to seal the render as it still has to breathe, so choice of primer; if any, is important.
IMHO.

 

[hmtiling]

Unlike lime render I didn't realise that was the case with s&c.
Would the paint not have sealed it anyway?

 

[Bill]

Why would you NEED to prime if back to the render? Never primed render and done tons of exterior stuff.

Sometimes things get overcomplicated.

 

[hmtiling]

Why would you NEED to prime if back to the render? Never primed render and done tons of exterior stuff.
To improve bond strength and regulate porosity which on a weak mix render I would do.
That's the first time I've heard priming referred to as complicated 😉
Sometimes things get overcomplicated.

 

[hmtiling]

I've done loads of external work too Tom and had no problems after priming

 

[Just Rizzle]

out side porch in feb? I wouldn't do till may at the earliest

 

[gordybaillie]

Looking to start this job today and I am going to use Mapei Mapeker Rapid Set which I have never used before but seems to get good reviews.

Anyone recommend a good primer or do I not really need to prime the area?

Thanks!