Render advice please

[LaChab]

Hi,

I'm planning to use EWIPro 225, 333 and 076 on our eps blocks.

I just wondered whether it's necessary to rasp and or wash the blocks first, and whether we should use 310 primer first under the 225.

The blocks are about 6 months old, so not dusty yet.

Thanks for reading.

[ChrisJ]

I don't know the product you are using but any that I have used all requiring rasping

 

The block maybe clean but its also got too smooth a surface so the base coat will not adhere and be loose and potentially fall off

 

And even tho only 6 months old I can assure you there is some UV damage and a light film on it, rub your hand across it and you will see it on your hand but maybe not visible to see

Edited Monday at 18:47 by ChrisJ

[Conor]

Leave that up to your renderer. All of our walls were rasped.

[Chanmenie]

Yeah just had mine rendered, the guy cleaned with a brush first then rasped the blocks didnt take long 

[LaChab]

Thanks all. Rasping it is then!