How to remove external sand and cement render and the metal lath it has been adhered to.

You are correct in the fact the only render suitable for you type of property is N.H.L. render its the only one that will allow your walls to breathe, if painted it should be a lime wash 3 coats on new render then topped up every three years. under no circumstances use a water proofer on this type of building it will create dampness. unfortunately todays tradesmen do not understand how the materials used in the construction of your property all work together in keepinf it dry old building and new materials just dont work finding someone who can use the old materials may by far be your biggest task. In reality the only way to remove it is with small bolster or kanga Silicone is a water proof material &as such is none breathable Good luck alex

Hi Alib_66, the two coats of the same mix is not an issue and this render does allow the bricks to breath. In most aspects, including ventilation those synthetic renders are not a practical improvement to cement based render. I would avoid lime and use a mix of cement with waterproofer only, then paint over the render to create a barrier from the wind, sun and rain. Waterproofers, just like some masonry paints prevent water ingress whilst still allowing the render to breathe.