Render scratch coat

How to scratch coat render on an outside wall. This video shows you how to apply render scratch coat on an outside wall ready for top coat render.

[@BuildWithAE]

Hi Sam cool video bud, have a awesome weekend all the best Tony 👍

[@SamDaviesBuilder]

Build With A&E cheers Tony! A weekend of work as usual, have a good one too!!

[@newry123]

nice one

[@SamDaviesBuilder]

Thanks!

[@babakopoulo]

Doesnt need a more thin , liquid cement part first ? If not, in which case this need ?

[@SamDaviesBuilder]

Sorry I’m not sure what type of plastering needs a liquid coat first

[@boxingcoachdz6846]

Did you mix just cement and sand or did you add waterproofer to the render?

[@SamDaviesBuilder]

I added a plasticiser to the mix. You could add a waterproofer/retarder if you didn’t want to use a plasticiser. You have to add one or the other to make it a workable mix

[@rockroll456]

How thick is the scratch coat bud and the top coat 👍

[@SamDaviesBuilder]

25 - 30 mm for both coats. So 12.5mm each coat roughly. Depends on what the wall is like too for how thin/thick it is, if the wall is all over the place then you’ll have to be a bit thicker to be able to straight edge it flat

[@rockroll456]

@@SamDaviesBuilder cheers bud it’s just the stop beads are only 12.5 mm thick so was wondering why they weren’t thicker 👍

[@SamDaviesBuilder]

@@rockroll456 you can get thicker stop beads in the plastic versions. I tend to put stop beads on the scratch coat and just use the ones for the 12.5mm thickness

[@rockroll456]

@@SamDaviesBuilder 👍

[@Zoltar1811]

What was the mix buddy

[@SamDaviesBuilder]

5:1 (5 sand 1 cement) with plasticiser

[@ferguson077]

is that plasterising sand?

[@SamDaviesBuilder]

I used building sand but you can use plastering sand too

[@ferguson077]

@@SamDaviesBuilder thanks reply could u help I plan to render inside of a pond would I need to do it in 1 go or could I split it to 2 times Thsnks

[@SamDaviesBuilder]

@@ferguson077 if it’s being rendered to waterproof it you don’t really want a join but if it’s not then you could do it in sections

[@babakopoulo]

@@SamDaviesBuilder What is the difference of building sand to plastering sand ? Its broken stone and sea sand you mean ?

[@SamDaviesBuilder]

@@babakopoulo plastering sand uses finer grains so it’s easier to float