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Mike Taylor
 
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Default Cement mix for rendering external walls in winter.....?

For rendering it should be done in 2 coats
1st coat I would use a mix aof 75% leighton sharp sand (not river washed
sharp sand ) and 25 % ordinary soft sand. Use this at 3 parts above to 1
part cement. Scratch it well when setting. Top coat just use leighton sharp
in a 3-1 mix with cement. Do Not Use washing up liquid or any other
palsitciser especially in the top coat. You will find that it will rub up a
lot easier without.
If Leighton sharp is not available then a lot of builders merchants have a
special rendering sand. Soft sand will be too fine and not very easy to get
a rubbed up surface