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30th March 2008, 12:16 PM #1
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To seal or not to seal render before painting
I finished a house renovation around 15 months ago with a cement rendered finish over brickwork. I now have time to paint - I intend using 2 coats of Dulux Weathershield
One person tells me I must use a sealer/undercoat plus 2 coats, the next person tells me I just need 2 coats of paint. Anyone know?
RegardsLast edited by Bulldog Ward; 30th March 2008 at 12:23 PM. Reason: to get e-mail notification
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30th March 2008, 12:34 PM #2
Senior Member
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Check the Dulux site or supplier as many of their acrylic texture products require primer to reduce the effects of a fast absorbing medium.
In trade circles its called milking the walls. Its cheaper than paint too.
http://www.dulux.com.au/html/plannin...rep_coats.aspxc2=a2+b2;
When buildings made with lime are subjected to small movements thay are more likely to develop many fine cracks than the individual large cracks which occur in stiffer cement-bound buildings. Water penetration can dissolve the 'free' lime and transport it. As the water evaporates, this lime is deposited and begins to heal the cracks. This process is called autogenous healing.
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