I am now coming to the conclusion of a complete house renovation and have just an extension to render and then paint. The extension was built before I moved in and is constructed in an external skin of concrete brick. The internal skin is block work and it is cavity filled.
My proposal is to use a 3:1 10mm scratch coat using grit sand and opc after using a watered down PVA mix to dampen the wall.
Top coat (3-4mm)I was going to use 5:1 using grit and building sand and a waterproofing agent.
Does this sound about right?? Do I need to throw any lime in either of these mixes as a few posts mention it?
With regards to beadings etc, stainless, galv or plastic??