Pebbledash repair & Paint

You wanna hack off all lose or flaky render, back to bricks or block work. Water down surface with hose pipe, then prepare your mix. yes you can use lime, cement and sand, I’d use just cement & plastering sand myself with a bit of soft sand your looking for a radio of 1 part cement to 4/5 parts sand. You can use buckets or shovels to gauge your mix each one needs to be reasonably the same, you need two coats of render. The first is a scratch coat that needs to be 10mm thick or so give or take a little, the next is final coat that needs to be roughly the same to get it level with existing which should be around 20/25mm thick you need to wet down the surface again to stop the render drying out to quickly especially on a hot day. Don’t worry about getting it smooth or super flat as your going to be pebbledashing that will hide any mistakes but it needs to be reasonably flat, give the render a good 4 weeks to dry if it reasonably warm before painting 8/12 weeks if it wet or cold it needs to dry out properly before you paint otherwise your trap in moisture. Be sure to wash the pebbles in a bucket before applying to the render to get rid of lose grit. If your using a good quality paint like Dulux weather shield honestly you don’t have to mist coat If you don’t want too, if your using a cheaper brand do a mist coat otherwise the render will just soak up the paint a mist coat is 60/70% paint to 40/30% water. I’m a big believer you pay for what you get I’d steer clear from cheap materials myself with regards to B&Q paint there a reason everyone on site used delux and Layland paint there the two best brands on the market. Now you can use some special primers and watered down glue solutions before you put your scratch coat on I’ve never done this and I’ve always been fine but it up to you with how thorough you want to be I think the big thing is to make sure you wet down the wall before you start especially on a hot day and if it breeze blocks but it is generally good practice to do it regardless this ensures it doesn’t dry out to quickly and won’t crack. Hope this helps Regards Frankie BT Roofing Services

I thought the lime was already mixed in with the cement but not sure. As for the pva/ water down paint you don't necessarily have to as either way the paint will stick to the pebble dash anyway. As for the paint I would you sandtex as it more flexible and designed for exterior work others may say different but its personal preference

Well firstly its not an easy job youll need to fix the patches using a mix that will go off quite quickly and as soon as its levelled off you should place the dash as best you can by hand unless you have the right tool which is hard to find these days as it is a dying art, once dry you should apply stabilizer also best application for this and the paint is by a big masonry 4 or 5 inch brush which will be time consuming using a roller will pull out the pieces of dash and will create a terrible mess and itll take at least three good coats of paint with a brush maybe more after a liberal coat of stabilizer has been applied

Personally I wouldn’t use PVA or any adhesive before painting, a watered down coat will do perfectly well and provide a good base for the paint to take on next coat. Also highly recommend Zinsser Allcoat Exterior for any external painting it’s coverage is brilliant on any material/surface and lasts a very long time. A good 5 inch block brush will give best finish but most time consuming, I’d recommend a very thick pile masonry roller and then check patches with brush after, roll on brush off. As for the repair work, make sure there is enough depth to the cracks and other patches as possible or any render applied will soon come loose and crack. I’d recommend using a good plasterer as it’s a tricky job.

You will need a plasterer to patch it so it haves half a chance of looking right , my advice would be to use a dulux weathershield masonry or don’t use cheap brand paints

Hi first thing to tour questions as follows- yes lime sand and cement are correct you can get a machine to make the pebble dash affect just look online. Yes you can use PVA GLUE watered down or use a stablising solution it does the same job . One is water based and the other is a oil base. The last thing is not to by a cheap version of masonry paint it will not last. I recommend a Sandtex masonry paint or Dulux Weathersheid masonry paint it has a full body to the paint and it also covers better and also will give you the guarantee it will last for the years it says on the tin. from paul philpotts