Can you apply premixed render directly over existing worn render?

Existing render is on a concrete walkway and is worn in patches , cracked in others , and uneven.

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  • 2 months ago
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    you could ..but the chances of it stopping there are slim ..render needs a key ..hence the first is a scratch coat ...it gives a key as well as stops suction ..you could score the repair areas ..and apply a 50-50 pva mix ..add some pva to mortar mix ....ADD mortar for render is NOT with bricklaying sand ..either plastering sand or sharp sand 

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